LFGSS CC - LFGSS Cycle Club

Crank length is quite important, at least on the right hand crank, to avoid pedal strike on the banking.

Just ride faster Clive.

Crank length isn't even something the ever fussy UCI care about.

What days are you lot riding?

It's just I want to set up the camcorder when the 170mm+ crank brigade off here get on the track.

You've Been Framed will have new footage for once!

165mm... for the win spin.

I take it the rules don't apply to HH? I've ridden 180 cranks round Hh.

Don't know the height if the Bb, but 27inch wheels means I'm probably a bit higher?

Well not really because HHV tops out at about 30 degree banking whereas indoor ones are nearer 45 degrees.

Like Indra said, the banking at Manchester is much steeper and noticeably equally steep top to bottom. Ironically, there is probably more risk of pedal strike for a novice rider on a more gradual circuit as the tendency to lean through the curves is much higher. No idea though, what the rules and regulations are at Herne Hill in terms of crank length and bottom bracket hight.

BB height must be 265mm to use 165mm cranks.

Interesting... So with a higher bottom bracket you would be allowed to use longer cranks, yes? The thing is, that needless to say you will naturally lean going through the curves at speed, but the steeper banking at modern velodromes will compensate for that and even it out, hence I very much doubt that the said 165mm crank length limitation at Manchester applies to elite riders in all type of races regardless of bottom bracket hight. In fact I'll bet my life on it.

Yes, I've used up to 172.5mm cranks there and I crash far less there than on the road...

That being said my bike has a 290mm high BB anyway.

Oh and nobody ever checked how high the BB was or long the cranks were.

"... I crash far less there than on the road."

Glad to hear it, not you crashing less than on the road viable parameter for general safety standards... ;)

What days are you lot riding?

It's just I want to set up the camcorder when the 170mm+ crank brigade off here get on the track.

You've Been Framed will have new footage for once!

Good luck with that idea, I've ridden slowly round the top at Calshot on 175s without any trouble. Cornering clearance is much better with modern narrow clipless pedals than with classic track pedals, so it's pretty hard to get pedal strike if you're riding in the direction of the track. The only time I've ever clipped the boards with the edge of my shoe was doing a slow right turn to get up to the rail.

Narrow clipless pedals certainly makes a huge difference, much more than crank length. Besides I seriously doubt that scottmac really understands metric measurements. Pure speculation of course...

Pedal stack, Q-factor and crank length all play a roll so obviously there's gonna be room for negotiation here.

Which is why specifying just BB height and crank length is dumb, when a simple V-shaped channel could be used as a go/no-go gauge. Even tyre section width plays a small part in determining the ultimate limit of cornering clearance.

Nobody got time for that shit, a simple rule is required not some complex math problem.

It's not a math problem, tester is suggesting a bit of guttering you put your bike in if the pedals touch the side it's dangerous. Like the boxes at airports they use to check your carry on isn't too large.

Sounds complex

I agree, too much leaning.

Will people never learn.

Nobody got time for that shit, a simple rule is required not some complex math problem.

I've kept it simple; in truth, because the bike rolls around a sector of a cone in the most steeply banked parts of the track, the wheelbase becomes material to the question of how fast you have to go to avoid pedal strike. At the fine scale, even rake and trail can have an influence, because the head tube rises and falls as the bike is steered.

Will people never lean.

ftfy

It's not a math problem, tester is suggesting a bit of guttering you put your bike in if the pedals touch the side it's dangerous. Like the boxes at airports they use to check your carry on isn't too large.

agree that it's not a math problem
IT'S A MATHS PROBLEM

Ian is Oliver AICMFP.