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 Post subject: Skinny tires in the TdF
PostPosted: Fri Jul 07, 2017 5:10 pm 
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Anybody notice most riders using 23c or less in Le Tour? Even on that opening TT.
Looks like fairly high tire pressures, too, judging by the lack of tire compression seen in still frame shots.
Wondering if this is the ol' "ham sandwich in the mussette" mentality.
You would think pro riders are ahead of the curve on us.
Or does the pro team research differ from the data fed to us from tire and rim companies? :noidea:

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 Post subject: Skinny tires in the TdF
Posted: Fri Jul 07, 2017 5:10 pm 


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PostPosted: Fri Jul 07, 2017 6:52 pm 
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Ha, this is kind of like the "Why is no one using disc brakes in the tour" thread.

I haven't personally noticed what size tires most riders are using in the tour, but I wouldn't be surprised if there are just as many riders on 23's s there are on 25's. It's not like there are any huge heavyweights riding around there. I'm sure they're pretty much all on tubulars at least, with maybe an exception or two in the time trials. And I suspect they are mostly on 25mm tubulars, which are very close in size to what you get when you mount a 23mm clincher tire to a slightly wider (say 17mm internal rim width) rim. Where did you come up with this tidbit of information? Or are you just creating another entertainment thread?

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PostPosted: Fri Jul 07, 2017 7:14 pm 
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Just an observation, from pics and vids.
I'm presently riding some 22c tubulars (latex tubes), which feel a lot like 25c clinchers (std tubes).
My tubs measure more like 20-21.

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PostPosted: Fri Jul 07, 2017 11:16 pm 
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As I understand it, wider tires only roll better when compared to skinnier ones at the same air pressure. Skinnier tire pumped to hell still have less rolling resistance and are more aero, but obviously this would likely be detrimental in a downpour TT like Stage 1. It's also not just about the what the tire label says anyway, many teams put 23mm tire but they actually measure wider (24-25mm) because of the hoops they're using.

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PostPosted: Sat Jul 08, 2017 8:14 am 
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bilwit wrote:
It's also not just about the what the tire label says anyway, many teams put 23mm tire but they actually measure wider (24-25mm) because of the hoops they're using.

Doesn't work that way with tubs.


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PostPosted: Sat Jul 08, 2017 5:11 pm 
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Kittel has been using 26mm Specialized tubs, on disc wheels.

Good enough for three stage wins thus far.

Actually, that extra couple of millimeters in radius might have helped earn him that last win.


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PostPosted: Sat Jul 08, 2017 5:36 pm 
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This is JUST like the disc brakes issue. Recreational riders love disc brakes and big soft tires. Rim brakes and skinny hard tires are faster* so that's what racers use. Add compact chainrings, 32t cassettes, and tall headtubes to the list. Nothing wrong with being comfortable and going slow (I mean for you, I couldn't hide the shame.)

*Unless you're riding in the rain on crappy pavement, which most of the time racers are not.


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PostPosted: Sat Jul 08, 2017 6:58 pm 
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23c tyres will measure 25-26mm on recent-decent rims anyway..


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PostPosted: Sat Jul 08, 2017 8:09 pm 
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vejnemojnen wrote:
23c tyres will measure 25-26mm on recent-decent rims anyway..

Doesn't work that way with tubs.


(Echo, echo, echo..... :P )


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PostPosted: Sat Jul 08, 2017 8:50 pm 
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Here's a closer look. 25 and 26 mm for all teams. Not in TT though.

http://www.bikeradar.com/us/road/gear/a ... ance-50337

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PostPosted: Sun Jul 09, 2017 5:25 am 
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Lelandjt wrote:
This is JUST like the disc brakes issue. Recreational riders love disc brakes and big soft tires. Rim brakes and skinny hard tires are faster* so that's what racers use. Add compact chainrings, 32t cassettes, and tall headtubes to the list. Nothing wrong with being comfortable and going slow (I mean for you, I couldn't hide the shame.)

*Unless you're riding in the rain on crappy pavement, which most of the time racers are not.


Today's race in the Jura was a great day to ride 26mm tubulars.

Like many of the racers on the course today. :)


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PostPosted: Sun Jul 09, 2017 7:19 am 
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http://www.bikeradar.com/road/gear/arti ... nce-50337/


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PostPosted: Sun Jul 09, 2017 8:57 am 
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Lelandjt wrote:
*Unless you're riding in the rain on crappy pavement, which most of the time racers are not.
I think we need to know where you live, everywhere I've lived, raced or ridden has had tarmac rough enough that the "narrow hard fast" mantra was rubbish the vast majority of the time.


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PostPosted: Sun Jul 09, 2017 12:34 pm 
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This is always a clinch between what the generally overweight new cyclists need and what sub 70kg racers need. 25mm tubulars are now the standard in the pro peloton and what data I can find shows that the aerodynamic penalty of going wider outweights the rolling resistance benefits for non-cobbled races. And anyone who has ridden 25mm tubulars to compare with 25mm non-race clinchers know that the tubular is considerably more comfortable than the clincher.


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Posted: Sun Jul 09, 2017 12:34 pm 


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PostPosted: Thu Jul 13, 2017 11:46 am 
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wingguy wrote:
vejnemojnen wrote:
23c tyres will measure 25-26mm on recent-decent rims anyway..

Doesn't work that way with tubs.


(Echo, echo, echo..... :P )


Hahahaha. Wingguy, that made my day. Thank you.


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