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File: seatpost brake lever.jpg (63 KB, 600x400)
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narrower and higher pressure tire IS faster
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>>1959054
No
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>>1959085
How is it not. Less friction
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>>1959144
Less casing flex leading to less hysteresis loss yes but more losses due to vibration. Also how higher pressures make you go up and down over road imperfections instead of just slightly deforming and going over them. Rolling drum tests only show the first one because of how smooth they are which is why higher tyre pressures and therefore narrow tyres were used so commonly, so if you're doing all your riding on a perfect smooth velodrome go nuts.

Maybe aero reasons but if Dan Bigham as a massive aero nerd used 25mm tyres for the hour record then maybe that's a good reason to bin the 23s.
>>
>>1959054
yes it is OP but nobody except misinformed parrots are saying wider is empirically faster. The thing is, just because it's proven faster in lab conditions doesn't mean it'll make (you) faster. Yeah, you'll catch higher peak speed with 21s (does anyone even make 21s anymore?) over 28s but unless you're fit af, you'll fatigue out sooner from the harsher ride and produce a lower average speed. Just like how a "faster" bike won't actually make you that much faster, speed comes from within. You can min/max the bike all you want OP, in the end you'll still be a leglette with less than 3 horsepower
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>>1959085
Yes
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>>1959054
idk I'd say it depends
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>>1959054
lots of faggots posting old pasta recently. i remember this one too.
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>>1959054

anything below 28 is now officially retarded and the anger of those with garbage clearance on their old frames only feeds my amusement.
>>
Tubulars ARE better
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>>1959347
get with the times chud, the water level is now 30
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>>1959347
Hey NO, I get a more aerodynamically efficient AND structurally stronger and therefore lighter frame by completely designing it around 23mm rubber bands
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>>1959347
25 is fine, don't be a faggot
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>>1959351
A SVELTE twenty-one American pounds, FLAT
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>>1959351
>not 19's
ngmi
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>>1959353
I like 24 and 25. The S-Works 24 time trial tyres on my fixie are probably the best road tyres I have ever used.
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>>1959347
I think 28s are pretty much the best from both worlds.
Rode a lot of 23 and 25s and even tried out some 32 and 35s.
Somehow 28s get the cushyness and comfort from 30+ tires and the speed and nimbleness from 23s without the drawbacks. Its also a better feeling not riding downhill on 8bars+ at 40mph.
Rolling resistance seems also reduced compared to smaller ones.
>>
least gookiest fixed gear
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>>1959054
This dude be breaking with his dick
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>>1959054
This bike angers me. Its braking performance will be no better than a brakeless fixie. Either it's free and the brake has the disadvantage of requiring the rider to go one-handed or it's fixed and the brake is superfluous. Poor show.
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>>1959367

don't forget better braking from the larger contact patch, meaning corner entry has wider allowances.
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>>1959350

I rarely see 30s it's all 28 and 32
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>>1959394
>Its braking performance will be no better than a brakeless fixie.
Depends on the rider I guess. I won't speak for you, but in my case your statement would definitely be untrue.
>>
>>1959394
It's a legal compliance brake. Some places have laws that bicycles must have x equipment to be used on a road.
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>>1959054
Just get an e-bike with fat tires and maintain your level of effort. You'll be much faster and still get the workout you're doing it for.
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>>1959526
kys
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>>1959528
I don't have a sister to kiss.
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>>1959412
That's because we're early, the industry will meme 30s once the market is saturated with 28s.
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>>1959528
why are you posting the danish word for kiss, faggot
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>>1959149

I’ve seen results of these rolling drum tests 20 years ago in bike magazines and while those advantages regarding casing flex mentioned are true, there was the same absolute pressure put into each tire for comparison during the test cycles

So these were interesting phenomenons to be observed under lab conditions, but e.g. who rides a 28mm tire at 8 bar, compared to someone normally using a 23mm tire with that (appropriate) pressure and same total system weight?
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>>1959150

Continental Podium TT tubulars have around 20-21mm width
>>
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The science is settled.
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>>1959566
Bet he wasn’t riding on that grass in the picture though
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>>1959566
I use 80psi because I am 100kg and I don't want my 28 gatorskins to flat.
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>>1959592
I use 80psi because I’m 70kg and I don’t want my 25mm condomskins to flat
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>>1959566
i sue at least 110 in my tubulars
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>>1959609
How is the tubular life? If I’m considering a wheel and tire upgrade at the same time, is it worth looking into the cheap carbon tubular wheelsets/tiresets I see all over my local craigslist?
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>>1959530
>>1959532
kys
>>
>>1959592
>>1959566
I'm 102kg and I run 120psi in my 28mm foreskins. In my experience, I'm significantly faster at this tire pressure than at something like 85-95psi, and I'm able to not only build up speed quicker, but also able to maintain higher levels of speed with higher tire pressure.
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>>1959619
>german girl heiling on a bicycle
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>>1959054
damn this is peak bicycle aesthetics
what is this type of wheel at the front called? what is it purpose? damn this looks cool
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>>1960400
oh boy
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>>1959144
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>>1959382
Lmfao.Tats actually the only viable option to safely brake with that shit
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>>1960584
Ok but do you have actual data that isn’t the unverified opinion of a single man in charge of an oversized road bicycle tire company?
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>>1960680
Nobody does, Jan has the minds of roadies by the nuts, he can say whatever he wants and then post 4 or 5 of his last rides around the park as “proof” and people will eat that shit up

You know it’s been like 3 years since he said handlebar bags are aerodynamic and I don’t think anybody since then has tried to rigorously verify that because deep down we all know that’s retarded and just said for shock value to a community who admittedly has been mostly running on outdated dogma and historic trends for a long time
>>
>>1959439
Where is it legally required to mount a brake lever for the rear brake on the seatpost?
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>>1961854
don't be dense
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>>1962262
I'm not the one who put the brake lever on a seatpost.
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>>1959054
only on a perfectly smooth surface
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>>1959592
tfw 105 lbs rollin 80 psi on 23mm
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>>1959054
For track and maybe some TT situations sure
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>>1959054
on a velodrome sure but in real life there are corners, chunder, wet, mud all kinds of shit that will ruin your grip and rolling resistance
tyre width type and pressure are specific to the terrain you ride on
if you live somewhere with baeutiful smooth clean tarmac and no tight downhill corners and nice dry weather then good for you go as thin and hard as you want and enjoy that free speed but where i live (the cursed island west of france) anything less than a mountainbike is awful and dangerous
>>
>>1959150
minmaxing your bike means minmaxing for you, your terrain and your riding style
thats where speed comes from (besides gainz)
for some people narrow tyres are faster and for some people a fatbike is faster
>>1959300
this bicht knows <3
>>
>>1959382
i can picture it...
in my head its hot but i know better than to assume 4chan users are attractive
>>
>>1959439
>complying with laws
>on a vehicle that is uninforcable
>>1961854
its for aero obviousely
>>
>>1959619
i love viola
how does she do it???
>>
>>1959592
>>1959605
>>1959619
>fat planets thinking pizzacutter wheels on their road bikes makes any difference
looooool
you guys must look hilarious
>>
>>1960400
i think it looks rly bad
if you want aero and / or aesthetics just get disk covers
thats fixiefags for you though i guess
>>
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>>1959619
OK, which one of you misogynist told her that's how to ride a bike?
>>
>>1960400

It’s a five-spoke wheel for track racing, probably made out of laminated carbon. It’s likely very rigid and a pain in the ass to ride on road surfaces.
>>
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>>1960400
>>
>>1959054
speed comes from attunement to the inner light and blinding rage at the absurdity of existence
>>
>>1965963

This, and intransigent femoral muscles
>>
>>1959085
yes
>>
>>1965601
>>1959619
I would pay good money to see her get weinsteined
>>
>>1959054
no shit sherlock
>>
>>1959054

Fixies are retarded. Even on the flat I use more than one gear.
>>
PSI is dependent upon a lot of factors...
Tire Size matters the most, but also the weight of the rider as well, both are equally important!

The larger the tire, the lower PSI you use due to volume of air in tire.

For the record I got dusted on a road bike by a guy on a 27.5 inch trek with like 20 PSI in his tires on the road, so don't tell me what is faster.

It's may be faster on a smooth rolling surface, but most bikes are NOT those slim tires, & I've sold A LOT of bikes, so, your post is vehemently situational, period.
>>
>>1968856
no
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>>1971747
yes
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>>1971803
>For the record I got dusted on a road bike by a guy on a 27.5 inch trek with like 20 PSI in his tires on the road, so don't tell me what is faster.

I believe it. I am not being sarcastic
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>>1964608
Actually, dipshit, I use a higher tire pressure specifically for SPEED, not because I'm fat. My weight has nothing to do with my decision.
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>>1959054
Then why dont you ride solid 15mm tires?
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>>1959054
try that on a dirt track
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>>1962300
That seatstay suspension angle seems like it would be perfectly perpendicular (useless) to the direction of deformation. Am I missing something?
>>
>>1977262
It's a trackbike. Some dude spaced fork and headset so that the frame sits at a different angle than it usually would.
>>
Rolling resistance is determined by contact patch shape and pressure, and energy lost due to tire deformation.
Even for a perfectly smooth surface it isn't necessarily true that smaller is faster.

But road cycling is filled with lore, boomers and retards making a lot of noise. Combined with physics and tire physics being difficult subjects for most people topics like this are excellent bait.
8/10 OP.
>>
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>>1977263
>It's a trackbike
No, that's a road bike.
Those are definitely brakes and derailleurs, multiple chainrings even, so I'm guessing the number of gears is more than one.
The fork steerer is definitely some weird suspension fork, judging by the smaller "steerer" diameter probably entering a larger one.
And I'm not even talking about the fork. I'm talking about the seatstays. You didn't even answer my question.
Did you just decide to write some made up on the spot bullshit to seem smart on an anonymous image board and think nobody will notice? Are you stupid?
>>
>>1977263
Doesn't look like a track bike to me with the shifter bosses, cable stops and derailleur hanger? Does look like someone was fucking with the steerer though
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>>1977263
Source?
>>1977262
My guess is that the bike has front and rear suspension, since a short search turned up Cinelli experimented with it at some point.
>>
>>1977263
you're thinking of a criterium bike, sometimes referred to as a crit bike. Both track bikes and road bikes can fit the role of a crit bike but the underlying philosophy of a crit bike is a bike with sharp trackbike-like geometry, stiff triangles, but low gearing for explosive acceleration, designed for racing in small circuits with sharp corners.
>>
>>1971521
I'd pay good money to weinstein her
>>
>>1964606
It would be more aerodynamic if it were absent.
>>
>>1977262
Probably the idea is that the chainstay flexes near the BB and the rest of the rear triangle is rigid. The suspension element would be tangential to that movement.
>>
>>1960593
how? and is that a computer on the top tube? actual retard shit.
>>
>>1977310
When i was a kid and raced criterium, i had a 650b steel frame Razesa with a 48T, tubulars oc, Shimano 105 with no STIs still...

Wish i still had that bike.
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>>1977310
>Both track bikes and road bikes can fit the role of a crit bike
How can a track bike - having no cable stops, way to mount a rear derailleur, and a different rear hub spacing - fit the role of a crit bike?
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>>1980568
Because Red Bull Short Circuit (Fixed Criterium) is now a thing, so now there's track bikes with criterium focused geometry
https://youtu.be/qeuYw1Edmho
>>
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>>1980569
>>
>>1980570
https://youtu.be/U8Pm5Cxe5cs
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>>1980572
I refuse to refer to these fixed gear spectacles as "criteriums".
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>>1959566
i run 140 psi 23mm @ 70kg
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>>1980580
And you are right.
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>>1959085
yes.
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>>1959054
>>
>>1982632
kys
>>
>>1982634
u first bb
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>>1959592
people still ride gatorskins? I thought reddit moved on to gp5k
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>>1984303
it's a retrodouche hipster thing, like rim breaks or mechanical shifting. people with too much money get bored.
>>
>>1986600
Well, I'm fine with it, as long as they don't come for my peddles.
>>
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>>1959054
bros how come my fat tired 29 psi bike is faster ????
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>>1959054
I just changed from 32s to 38s because the roads in my city are shit (montreal), I don't feel like I'm any slower, but the ride is definitely more comfy.
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>>1987180
Lets roll down from the top
>fat tire
nope. That uses a radial tire that is a ton stiffer and heavier.
A "fat" tire motorcycle would be a cruiser with an even thicker and denser makeup. Like a 150/80-15.
That's probably has a 120/70-17 and a 150/55-17.
Let's not forget you have 6 speeds, and 30ish hp or 22,000 watts.
Let that sink in. 22,000 watts of power, where as an average human bicyclist is probably putting down 100-200watts.
>>
>>1959054
in my experience no
on my 100psi shwalbe marathons i feel every tiny bump and the grain of the road the gravel it all slows me down i have to be very picky about my lines
i have to slow down for potholes if i cant hop or swerve
cornering with hard skinny tyres on anything but smooth dry tarmac is scary as shit and i end up having to brake more for turns
>inb4 skill issue
maybe im not rly a roadie so im still learning how to corner on the road on tires like this
regardless i am slower
my gfs 1.95 conti double fighters at 60ps are faster
they roll smoothely over all that shit and i can corner muuuuch more confidently so i dont need to brake when theres a bit of gravel mud or wet in a corner
i think outside of aerodynamics and perfect tarmac thinner and harder is slower, much slower
plus on the wider softer tyres i can take shortcuts over rougher terrain that i just cant do on the marathons
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>>1959144
post sauces
as far as i know there is no hard evidence only speculation based on ideal conditions
in the real world based on actual experience it seems to not be true
fat tyres dont seem to roll any worse to me and in not ideal conditions (the real world) fatter tyres roll faster
>>
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>>1988360
It's obviously a 110 and 140. Nobody makes 150/55.

That's still a relatively wide tire, thoughever, a much lighter prototype racing bike of that displacement uses a 90 or 100 front and a 115 or 120 rear.
>>
>>1959054
If you only ride on smooth glass, sure.



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