Road bike tires

GP4000sii

>>1038237
This ↑ desu. Tour Magazine confirms it.

>>1038240
SWorks Turbo 2 b h

Vittoria Open Corsa

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>>1038237
Best all-around tire. Anything else is a waste of money.
Check online for discounted deals on them.

>>1038232
>20-40psi
BOINGY! BOINGY! BOINGY! BOINGY! BOINGY! BOINGY! BOINGY! BOINGY! BOINGY! BOINGY! BOINGY! BOINGY! BOINGY! BOINGY! BOINGY! BOINGY! All the way down the road.

>>1038252
t. someone who's never ridden on low pressure tires

>>1038252
This guy will never feel the speed and ease of good low psi road tires

>>1038252
Fat bike tires at 20 psi feel hard as a rock.

>>1038232
>26x4.5

WHAT

>>1038229
if we're talking straight numbers and performance tires, it's undeniably the s-works turbos. the cotton ones.

It used to be GP who was making the best tires, but ever since specialized hired their designers, their shit has come out on top. turbos my man

>>1038237
>>1038250

I came from Vittoria Rubino Pro 3s and bought the Conti GP2000sii since they were the only thin in stock. They're okay but I'd switch back to Rubinos in a heartbeat, They don't have the same grip in the wet and actually feels less compliant too. Also, they're more expensive for some reason

Aren't the specialised ones more a pure "raceday" tyre, low durability etc?

I personally had a very good run with Schwalbe™ Ones, lasted a good while and acceptably few punctures. Would buy them again but trying out some others to see how they compare. Currently running Vittoria Corsa G+. Haven't used them quite long enough to make a proper comparison, but had one puncture in 600-ish km so far.

>>1038376
Yes, I'm sure the Turbo Cottons are probably the #1 choice for racing, but I would not even use them as a training tire unless you are just rolling in dosh. Get the conti's for everyday riding if you still want to go fast but you want some reasonable amount of life out of them.

>>1038373
GP2000sII? How old are they? I somehow have a feeling they are nothing like the 4000 that is so highly rated in all the tests I've seen.
>>1038376
This is a semi-unrelated rant, but fuck specialized. They have constructed some asshole agreement that their stuff can't be bought from online stores to my country, supposedly to support the lbs. But if your lbs doesn't have their shit then you're just fucked and you can't buy anything from them. What an excellent marketing plan.

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>>1038237
>>1038242
I've put lots of miles on both Turbos and GP4000s in the same 22/23mm size (the regular versions, not the race-only Cottons or GP Supersonics) and they're both great options for general road use. The difference between the two is that the Turbos roll very slightly faster but wear out in about 1,000 miles, versus the GP4000s which give 2,000+ miles before the rubber on the rear tires wears down to a noticeable flat shape. If I were picking between the two at the same price point I'd definitely go for the Contis, but if you find the Turbos at a significant discount (I bought my first pair of them during a 2 for 1 sale at dealer cost, then another pair of takeoff Turbos at a swap meet for $20) then you should snap them right up.

>>1038455
>>1038373
yeah, GP2000s? I've ridden and seen plenty of the old Yellow label GP3000 tires, and I was under the impression that they were just "Grand Prix" tires before that.

>>1038462
This picture is shooped. I can see from how the mortar is mysteriously evenly worn right along the top tube, from some of the pixels and from having seen quite a few shoops in my time.
Your post is fiction and so is your bike!

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OP again, installing these tonight

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>>1038749
You FUCKED UP

THE ONE TRUE MEME THAT IS COMPASS

>>1039018
Nigga why 23c, at least post some 25c.

Not the OP but Schwalbe One's actually ride really smooth. Still overpriced tho imo

>>1039312
They were always a few dollars cheaper than gp4k on wiggle when I was looking.

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What's your opinion on conti gatorskin tires? Was the only ones I find on local dealers on Mexico, still haven't tested, just 50km and liked how stiff they feel, the potholes are a nightmare here.

>>1039018
NOPE, i'm loving the Contis

>>1039576
I've had Gatorskins on one of my bikes for a year and change and they are really good, the only punctures i had were from shoddy rim tape. The guy that build me the bike was really surprised by them, it's not a tire he recommends as he usually goes for schwalbe marathons and big apples, he said he didn't think a tire made to avoid punctures would roll that well, i agree.

>>1038237
>>1038250
If you don't run these, you are a colossal faggot who should also remove saddle

>>1039576
if you want your bike to weight an extra 2 kg

>>1038455
>>1038462
Sorry, I must have mistyped as I was posting tired after work. They are indeed the much renowned GP4000sii and they still feel like they someone taped a layer of wax paper on my old Rubino p3 when running in the wet

>>1039576

I found them a right bitch to get on, they were so rigid.

Had some gatorskins on for nearly a year no problem.

Also got some Conti 4 Seasons for winter, done a couple of races on them and they run good, good for UK winter weather too.

>>1039724
>Conti 4 Seasons
>races
you fucking wat mate
are these cross races or what
wtf are you doing

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>not posting based Panaracer

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>>1039771
Also OEM for other folks like Soma Fabrications

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>>1039773
as well as Compass Cycles

>>1039592
I have a cheap trek 1000 bike that I use to commute so no big problem with the weight, my old tires (stock tires) weight almost the same so isn't a big issue for me, I just want to arrive on time to my office and don't be worried about punctures

>>1038282

specifically for cycling down stairs

>>1039771

panaracer: good or gook meme tyre?

>>1039951
Like, is there a point to them when known-good tyres (ie, gp4000IIs) exist other than to be a unique flower

>>1039953
>why would you use anything other than the thing that I like
A future retrogrouch in the making

>>1038250
>GP4000sii

Has anyone judged these against Rubino Pros?

>>1039951
Panaracer is a company, not a model of tire.

>>1040235
>Rubino Pros

Found my answer. Contis win

http://www.bicyclerollingresistance.com/road-bike-reviews/compare/continental-grand-prix-4000s-ii-2014-vs-vittoria-rubino-pro-iii-2014

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babe it looks like the Vittoria Corsa is the fastest tire though imho

>>1040239
It's cool that you're comfortable admitting that you take nonsensical information posted on the internet like a greased up dick.

Are you a cat 1 racer? Then information like the link you posted doesn't matter, you wont notice a difference.

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>>1040241

But the Schwalbe One has the best puncture protection

(no big surprise)

Schwalbe is the most practical roadie tire, as usually. I can't believe I've been shilling for Rubino Pros for five years now

>>1040244
>>1040243

Oh shit I just noticed the Schwalbe Ones are TUBELESS

TUBELESS??? WTF???

Contis back in the lead leadin the way

http://www.bicyclerollingresistance.com/

EDUCATE YOURSELVES PLEBS

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Final verdict:

1. Corsa has skinwall
2. Corsa has better puncture protection than contis
3. Corsa is slightly faster than contis

Corsa is best

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>>1038229
>ITT: There is only Conti or Vittoria

Hey OP, if you like numbers and paragraphs of convoluted information regarding rolling resistance, there's an ENTIRE QUARTERLY MAGAZINE published about how great Compass tires are.

(and they are pretty great from personal experience)

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>>1040249

Yes, goy. Everything is relative. You can't really measure anything. So how about you maybe buy these $80 panaracers from a guy who thinks cycling tech peaked before WWII

>>1040257
I can't hear you over my tires lack of rolling resistance and the unreal subtleness of my sidewalls.

>>1040259
What do you mean by subtleness?

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>>1040257
>a guy who thinks cycling tech peaked before WWII
... have you even read Bicycle Quarterly or are you just being edgy?

Pic related.

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>>1040262

COMPASS CYCLES!!!

"ULTRA-ROMANCE RIPPED US OFF"

"THE THIRD BOTTLE IS PISS"

"HE STOLE THAT IDEA TOO"

"THREE CHAINRING BOLTS = GRAMZ"

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People don't realize that Jan Heine once fractured his skull riding a modern road bike because it was able to come to a complete halt in less than 30 yards. He was so startled by it he did a header, and woke up thinking he likes in the hillsides of France, 1925, as a world renowned "Rándonéur" (gibberish word he made up)

Jan Heine hate thread?
Jan Heine hate thread.

Sign me up.
>imb4 muh ubrakes

>>1040307
Why does it seem like opinions on him are so polarized? Seems everyone who's aware of him either takes what he says as gospel or thinks he's a smug retrogrouch.

>>1040311
He pretends to be a scientist and has a "journal" where he does testing, but also shows off his extreme bias.

But you'd find the same kinds of people attracted to grant or veganrider anyways.

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>>1038232

>>1038229
Michelin Pro 4 Endurance.
They're not the *fastest* but they're way, way faster than Vittoria Randonneurs.
If you truly want the fastest then you'll be on race tires and you'll get a flat every time you hit a little sharp thing. Go with something like the Pro 4 Endurance and you'll be almost as fast and almost never get flats. They are considered road bike training tires (as opposed to race tires)

>>1040326
Oh and specifically get them in 23c
A lot of people like 25c but whatever
I ride 23s and I love them. So go 23 if you're cool, or 25 if you're not cool. Either one will be good. Just don't go with some super wide >25 shit.

>>1040327
>riding 23c
Don't listen to this a retrogrouch.

>>1040327
>go 23 if you're cool, or 25 if you're not cool
Get a load of this hipster

>>1040327
>the difference between cool and not cool is 2mm

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23s are pretty cool on a light flexy steel frame imo

If you have a modern stiff road frame or a stiff hiten shitter then 25s will give you a stiff/ stiffer ride than a flexy steel ride with 23s

Just my 2c

also i really like pro 4 service course, 23s and 25s, but they're not nearly as durable as 4000s II, and i fubared a new one underbiking

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>>1040257
2edgy4me

Jan's not a complete retrogrouch. He's fully onboard with STI shifting, clipless pedals, modern 2x11 drivetrains, etc. Pictured is his favorite bike nowadays, which even has disc brakes (although he did insist on replacing the crank with one of his 3-bolt Rene Herse ones).

>>1040267
>Rándonéur" (gibberish word he made up)
bruh

I don't take Jan's musing as gospel but the dude rides more than all of /n/ put together, so I do take an interest in what he has to say.

>>1040265
>"THREE CHAINRING BOLTS = GRAMZ"
what's wrong with three bolt chainrings?
>>1040249
I'm not saying compass tyres are bad or anything but that entire quarterly magazine is written by the guys who make compass.

>>1040408
>that entire quarterly magazine is written by the guys who make compass.
jokes.jpg

>>1040343
>>1040345
Oh look, it's the "wider tires are better" meme!
>>1040353
Yep. I'm glad you understand.

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>>1040356
>dat gearing

>>1040451
some memes are good anon
this is one of them

>>1039951
Paselas are god-tier on steel road bikes. Make sure to get the PT/TG version though, the standard version gets flats way too easily. The PT/TG (PT and TG are the same thing, just different names different years) never get flats and they ride really fucking nice. I have them on my OTS and wouldn't trade them for any.

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>>1038259
>speed

>>1040453
ITT: /n/ memes newfags into getting fat (25mm) tires so that if we ever meet said newfags irl, we can beat them in cat6s

>>1040262
>carbon fork
>hydro disc brakes
>downtube shifters
WHYYYYYYYYY

>>1040247
>300km later

>>1040456
Stop being silly Anon.

http://www.bicyclerollingresistance.com/
wider is better

>>1040493
We know, just ignore the 23mm troll

>>1040468

Not defending randomemeurs but Lance used to use a left side dt shifter for muh gramz

>>1040468
lightweight/non-jittery, good stopping power, low-maintenance. why so mad?

>>1040533
also, front mechs in the mid-late '90s were still friction-only i.i.r.c.

>>1040468
Were hydraulic Shimano STIs a thing yet when this bike was built?

>>1040554
>also, front mechs in the mid-late '90s were still friction-only i.i.r.c.
Incorrect. 7400 came out in 1990 and had indexed F shifting. Lance did it for the grams.

>>1040569
Aside from the retro-ish frame look at everything else on the bike. Of course they were, it's got modern dura ace (well, now 1 model behind after the refresh) components.

>>1040262
>>1040468
>>carbon fork
>>hydro disc brakes
>>downtube shifters

I agree, its retarder, but its muh unique snowflake. carbon fork for stifneess isnt eventhat much of an advantage with tires those size.

>>1040533
>but Lance used to use a left side dt shifter for muh gramz

not for grams, but for preventing loosing the chain.

>>1040362
why the traditional bend on a touring bike?
I never got along with triple doe, smart choice of double is best imho - less to thing about and easier to adjust.

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even meme king rides a double, its really far more range than you need

>>1041352
also notice the high end pinned flat pedals with ultra low profile, none of this strap or spd memes

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>>1041352
Which meme king?
>not having both at once

>>1041352
Nothing wrong with having two chainrings if they are the right size. Almost always they are not.

Oh and try mounting that small ring on shimano, sram, campy etc...

>>1041369
The trick is to use a shimano road triple with a 130 or 110 BCD and a 74 BCD. Then you only use two chainrings. You can get nice combinations like 46/30 or 42/24.

>>1041378
Also component manufacturers are working to (re)make off the shelf double cranksets with very small inner chainrings for the growing adventure/gravel market. FSA has a 43/30 that should be out by now.

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>>1041367
>Which meme king?

ultra romance

>>1041369
>if they are the right size. Almost always they are not.

compact 50/36 with a wide range casette (11-32) should do the job even for a touring bike, but putting a trippler with 24t as the smallest is a gear for wall climbing.
I do understant your point about mounting smaller chainring on doubles - customization is a pain, but double is much more "user understandable" from a driving point of view that tripple which often creates weird chain lines and jump between chainrings is often to big. my 2 cents.

>>1041378
>>1041379
>The trick is to use a shimano road triple with a 130 or 110 BCD and a 74 BCD. Then you only use two chainrings. You can get nice combinations like 46/30 or 42/24.

why not use a MTB XC category double 40/26 and upgrade the bigger ring, youll have to solve the Q factor doe

>>1041385
50/11 is not a sensible option for any touring bike. 36/32 is very limited too. Loaded and faced with a hill offroad most people would have to push the bike. What one needs is an inner chainring small enough to go up a hill, spinning, not standing, in any condition, especially offroad. MTB double cranksets (say 44/28) would be perfect for most tourers if it weren't for their wide chainlines and Q-factors.

>>1041387
Many manufacturers choose this option but then you're pretty much limited to barcons/downtube shifters if you want to use drop bars. STIs have to be used with a road front derailleur and those usually have trouble dealing with 50mm+ MTB chainlines.

>>1041389
I guess you are right, I dont have much experince with heavy touring bikes but now own a pretty god 90s road bike that is stuck with 39-23 as the lowest which is an absolute pain for climbs.

I do hate tripple so much that I would rather suffer a bit and have satisfactory shifting or put a compact on it in the future.

http://www.bikeradar.com/road/gear/article/super-compact-chainsets-the-next-big-thing-for-road-cyclists-48974/

>>1041409
>super-compact-chainsets-the-next-big-thing-for-road-cyclists
I'm okay with this, road bikes have typically come stock with highest gear ratios too high for most riders to ever make much use of - outside of actual racing, a 4:1 ratio is plenty big enough. Switching to smaller, closer-spaced chainrings is an easy way to give most riders better shifting and a better suited range of gearing.

>>1041395
>stuck with 39-23
Why would you be stuck with a 23 on the back though? most road derailers will handle at least a 25, and you could always get a derailer with a little more capacity...

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>>1041409
It's sad that it's considered to be the next big thing when 50 BCD cranks with tiny inner chainrings used to be very common. Better qfactor than modern cranksets too.

Everything that t is old is new again.

>>1041431
No they were not very common. RH cranks aren't 50BCD and TA were often used with large rings.

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>>1041389
>50/11 is not a sensible option for any touring bike
People on /n/ are so weak they can't run 53/11 on their touring whips?

Spin that shit up like a mad cunt bomb hills bitch descend mountains 100km/h errrr day breh smash out the miles err day run this shit like nasdaq

>>1041409

40 / 26 on my touring bikes. Chill rides babe

>>1041463
in b4 that pasta.

>>1041436
They were very common in Europe and while there are 70BCD versions the 50.4BCD version is the most common.

>>1041493
>They were very common in Europe
No they weren't

>while there are 70BCD
RH cranks such as the ones you pictured are EXTREMELY uncommon

>the 50.4BCD version is the most common.
No. As previously noted, those were often paired with big rings. TA and Stronglight used 50.4BCD for standard 52/42 cranks.

Only in your imaginary fairytale retrogrouch land were tiny chainrings common.

>>1038490
Btfo! confirmed for not having a top tube!!

>>1041463

Yeah dawg get that 300lbs worth of bike, rider, and gear up to 50mph on the downhill brah. Gotta go fast ya'll

>>1041350
I thought garbon was about lightness and Al was for Stiff&Jittery

>>1041378
Hmm yeah that might work.

>>1041379
I tried to buy the FSA 30/46, but couldn't find it anywhere but their own website. Ended up with 34/44 rings on a 110BCD road crank. 44 feels about as big as I'll ever need, but the 34 could be smaller ( or I could bodge a bigger cassette, but it's already a 12-32... )
I'm not sure how well the 16t jump works, it was pretty annoying with 34/50, the usual cruising gear was right in the middle so that you were almost always cross chained...

>>1041385
Yeah I guess this is one of those things that depends on where you live, what cadence you like, how heavy stuff do you carry and all that. Personally I'd enjoy that "wall climbing" 24.
But I don't get how triples would have bigger jumps? All I've ridden have around 10t jumps. 22/32/42 on my MTB. 30/39/50 (or 40 in middle.) on hybrids and the like
Usual double setup seems to be a 12-16t jump.
Also I find I get to ride with a better chainline with triples, but obviously there is the possibility to get it horribly wrong if you have no idea what you are doing.

>>1041387
I think there are some issues with shifter/derailleur/chainline compatibility. I'd like to try a setup like that if it worked out mechanically.

>>1041389
Right, exactly my thoughts.

>>1038232
>26 × 4.5
wut
Also
>Have fun in the rain with those smooth tires

>>1041560
http://www.sheldonbrown.com/tires.html#traction

>Unfortunately, most people assume that a smooth tire will be slippery, so this type of tire is difficult to sell to unsophisticated cyclists. Most tire makers cater to this by putting a very fine pattern on their tires, mainly for cosmetic and marketing reasons. If you examine a section of asphalt or concrete, you'll see that the texture of the road itself is much "knobbier" than the tread features of a good-quality road tire. Since the tire is flexible, even a slick tire deforms as it comes into contact with the pavement, acquiring the shape of the pavement texture, only while in contact with the road.

>People ask, "But don't slick tires get slippery on wet roads, or worse yet, wet metal features such as expansion joints, paint stripes, or railroad tracks?" The answer is, yes, they do. So do tires with tread. All tires are slippery in these conditions. Tread features make no improvement in this.

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>>1041560

Get gud. Not running master race tier 20psi front, 200psi rear.

>>1038243
RIP IN PIECE
LONG LIVE OPEN CORSA G
>tfw Corsa Evo CX III is/was a personal favourite

>>1039576
Super durable, but if you're looking for maximum durability, look into Gator Hardshells, and Schwalbe Marathon Plus

I've been meaning to try out Challenge's line of tires, maybe sponsors will give me the opportunity to try them, or the Turbo Cottons

>>1040356
Service Course are like half the price of 4KsII though

>>1041576
Would also like to add, one of my bikes came with Vittoria Competition Formula Unos and they are straight fire. The rear exploded on some glass though.

>>1041569
>dat fork design

>>1041431
>mfw these would cost over 600aud

fsa supercompact wide release when

>>1041513
Yea dawg you totally understand basic physics

>>1041619
Which where you after? Pretty sure you can get praxis works 48/32 here in aus

>>1041557
>22/32/42 on my MTB.

no matter how I tried, I never got used to this combo, front chainring gave either too big or too small ratio, and I always needed to change to bigger RD gear after front downshift, so irritating - once I gone to 24/36 (its a bigger jump but somehow it was optimal for trail riding) I never looked back but it was a heavier AM type mtb not XC... I would still preffer smth like 24/38.

>30/39/50 (or 40 in middle.) on hybrids and the like

mmm, this sound pretty nice.

>>1041638
Oh yeah, I have looked at those. The Zayante seems pretty nice and at $360 the strayatax is even fairly reasonable. Then you add in the proprietary BB and it comes out to more than double what I paid for a new ultegra crank on my other bike.

Also kind of curious about 46/30 but that might be overkill I don't know.

>>1041642
Got a spare 5 bolt crank? Just buy the buzz chainrings then

>>1042433
The crank on the bike is 5-bolt acutally (RS500), but
>48/32 110BCD VIP NOTE – This is a custom ring set that can only be installed on the new Praxis Works branded 110BCD road cranks. This specific set includes custom bolts required for installation. This set will not install on prior generation “TURN” road cranks or other brand cranks.

unfortunately no help.

>>1042451
Goddamn proprietary bs

>>1042451
Is the 48/32 even different enough from 50/34 to even bother looking for them?

Also guys like TA make everything from 33 to madness for 110 cranks. You could pick 48/33 if you like that. I got the 44 ao I have 44/34 and I like the shift a lot better than 50/34.

Vittoria G+
Tubeless if possible
If not, latex innertubes
Wide as possible too

>>1042468
It's less proprietary than a smaller BCD. Normal 110BCD simply can't fir smaller than a 33. It has nothing to do with goddamn proprietary BS.

>>1042710
No, it's not that different. That being said 50t is too big for most people with an 11t cog.

>>1039576
Absolutely amazing, I've had one puncture in 6500 miles with my duraskin hardshells

>>1038749

I tried GP all-season tires once, they felt slippery cornering in descents. Otherwise, you can't go wrong with them. I'd recommend Michelin pro race tires though.

>>1039925
>I have a cheap trek 1000 bike
Can I see it?

>>1038253
>>1038259
>>1038262
t. filthy casuals who never exceed 10mph (except downhill).

>>1046751
t. filthy casual who only has one bike

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What does /n/ think about the Conti Grand Prix 4 Season tires? Any good for touring?

>>1046869
>hard as a rock
>no black chili
>blatantly under dimension
>expensive for what it is
Meh.

>>1046872
What would you recommend?

>>1046873
"Touring" is too loosely defined. I've "toured" on everything from GP4ks to Racing Ralph. If you want a good slick in wider dimensions the Vittoria Voyager Hyper is an interesting tyre. I have a set that I've not ridden much yet, but they feel promising. If you want a narrow slick it's the GP4ks - Black Chili, low rolling resistance and class leading puncture protection. For semi-slicks ... well, there are loads.

http://www.bicyclerollingresistance.com/tour-reviews/vittoria-voyager-hyper-2016

>>1046869
Insanely good puncture protection for the weight. Can be found at 28 mm and maybe even 32 mm, but they're actually narrower. Fast (according to tests). Don't pay the full msrp. I've riding my second set of these (28 mm). I had only one puncture flat and that was after some 3000 - 4000 kilometers. Tires were worn through and I changed them.

Do tires with an internal puncture-breaker layer lose puncture resistance after so many miles? Or only once the layer itself gets compromised?

>>1038229
I really like Schwalbe One. Its very fast and very grippy. Its quite a soft compound so it does wear quite quickly, and they are quite expensive.

>>1047200
Not that I've heard of, but I'd imagine if it happens, you'll notice the tread delaminating or the sidewalls cracking before it gets to that point.

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the Continental Grand Prix TT is the fastest clincher tyre

http://www.bicyclerollingresistance.com/road-bike-reviews

Are 32c Conti Gatorskins cool, too?

>>1047230
Open TLR with a latex tube would be faster.

>>1038229
Training: Clement Strada LGG in 25mm or 28mm, or GP 4k sii
Racing: SWorks Turbo 26mm clinchers, or Vittoria Corsa Evo 25mm tubulars.

>>1038229
I was flirting with the idea of a coaster brake road bike vs. a fixie. Most of these come with 25mm tires. Are there any special considerations with tire width and braking effectiveness? Also rear tire wear. If it's not practical I will buy a standard fixie, but have no desire to ride fixed gear.

>>1047308
>SWorks Turbo 26mm clinchers
I bought some of these for tooling around on when specialized had a 2 for one, they are definitely the best tires I've ever used, super fast but also extremely comfortable. The 26mm Turbos were far more comfortable than some 28mm tubulars I had.

>>1047301
You'll always be cool to me champ.

>>1047200
I figure its minimal on like nylon and possibly kevlar protection belts,but vectran used in both some schwalbs and conti's gets me worried

"Vectran Disadvantages
Although the tensile strength is similar to Kevlar, Vectran still tends to experience tensile fractures when exposed to significant stress. The wispy, hair-like fibers tend to fray, to easily acquire dirt, and to readily entangle in hook-and-loop fasteners, from which they must sometimes then be cut or (when possible) torn.[2] If used without protective coatings, Vectran has low resistance to UV degradation."

Is there a chart online that shows what PSI one should run on 700x25 tires for a given rider's weight (50 kg. 60, 70, etc)?

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>>1049903

>>1049905
>mfw have been over inflating by 15 psi for 4,000+ years

>>1049906
It's not an exact science