track racing question • the big lie

[oldpotatoe]

Yikes, pretty funny thread, pretty sure not to be taken very seriously...BUT
'Tis the Season'...

[11.4]

Whhaaatttt?

I must still be digesting turkey. I don't get this thread. Is there a question? I don't see the title of the thread addressed here. Is someone looking for a serious discussion about track tire pressures and diameters?

Please pardon me if I can't figure out the obvious here.

[11.4]

And Marc, I should have bought back that Spectrum from Bironi and never let you get your dirty little hands on it. You don't deserve it. Nobody deserves it. I should never have sold it. Best bike ever. I'll never find one like that again.

[m_sasso]

Lane that beer can BMC is now hanging from the joists at Burnaby, all I ride is the Spectrum for mass starts. Lost a quarter of my face to Melanoma this past week so you may get the Spectrum back in the not too distant future.

[11.4]

Originally Posted by m_sasso

Lane that beer can BMC is now hanging from the joists at Burnaby, all I ride is the Spectrum for mass starts. Lost a quarter of my face to Melanoma this past week so you may get the Spectrum back in the not too distant future.

OUCH. You Canadians and your excessive sun exposure. Hope you have a good prognosis.

[AgilisMerlin]

Originally Posted by 11.4

Whhaaatttt?

I must still be digesting turkey. I don't get this thread. Is there a question? I don't see the title of the thread addressed here. Is someone looking for a serious discussion about track tire pressures and diameters?

Please pardon me if I can't figure out the obvious here.

Right, what's the track standard¿

[unterhausen]

Originally Posted by spoonrobot

Waiting for someone to win Snake Alley on 42s or Unbound on 2.35s or sub-50 hour PBP on 48s or 1 hour 40k TT on 35s or Ironman Championship on 38s

I noted that you picked 48mm and 50 hours for PBP, because my guess is that someone has done a Charly Miller time on 44mm tires. Granted, the people who are riding it in 44 hours are riding smaller tires. I'm sure they are bigger tires than they used to be though. There was only one short stretch where I really wished that I was riding bigger tires than 32mm. Roads in France aren't so great, so something bigger might not have been so bad.

I recently watched the rerun of Paris Tours and it seemed like most everyone was riding fairly large tires. They looked bigger than 32mm to me, but those guys are all really skinny so maybe I'm wrong. That's some very tame gravel.

[spoonrobot]

Originally Posted by unterhausen

I noted that you picked 48mm and 50 hours for PBP, because my guess is that someone has done a Charly Miller time on 44mm tires. Granted, the people who are riding it in 44 hours are riding smaller tires. I'm sure they are bigger tires than they used to be though. There was only one short stretch where I really wished that I was riding bigger tires than 32mm. Roads in France aren't so great, so something bigger might not have been so bad.

I recently watched the rerun of Paris Tours and it seemed like most everyone was riding fairly large tires. They looked bigger than 32mm to me, but those guys are all really skinny so maybe I'm wrong. That's some very tame gravel.

I picked 48 bc I mis-remembered what Jan was riding for the 2019 edition. Turns out he was on 42s.

It would be pretty surprising is someone has done Charly Miller time (56:40) on 44s since RH is the only producer of fast tires in that size and 1. the type of person to do such a fast ride would probably also be 2. sharing that info with Jan.

• Year Tires Time
• 1999 700cx28mm 75h55m
• 2003 650bx38mm*52h45m
• 2007 700cx30mm 50h00m
• 2011 650bx38mm 53h10m
• 2015 650bx42mm 71h15m
• 2019 650bx42mm 56h35m

*Tandem

I'm sure they are bigger tires than they used to be though.

Perhaps, I looked up photos of the first few dozen finishers back in 2019 and came away with the impression that all were on 23s/25s - maybe a few on 28s. They eschew fenders as well.

[many_styles]

You know the Silca tire pressure calculator has both wooden and asphalt tracks as a surface selection.

Under bike weight distribution, there’s an option for track too

I added my weight plus a hypothetical weight of a 14lbs bike with 32s and the suggested PSI is 88.

This calculator is to calculate the best PSI for the fastest possible air pressure and not comfort.


Sent from my iPhone using Tapatalk

[nooneline]

Everyone's got an axe to grind in this thread, but one of the reason that track racers prefer high pressure is that g-forces through the turns and certain turns uptrack and downtrack on the banking can cause larger and lower pressures tires to fold. This is VERY unpleasant to feel at 40+ mph on 43 degree banking...

[many_styles]

Originally Posted by nooneline

Everyone's got an axe to grind in this thread, but one of the reason that track racers prefer high pressure is that g-forces through the turns and certain turns uptrack and downtrack on the banking can cause larger and lower pressures tires to fold. This is VERY unpleasant to feel at 40+ mph on 43 degree banking...

Ah that's a great point!


Sent from my iPhone using Tapatalk