Time Trial / Time Trialling / TT

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onyerbike in reply to @hippy

Your 3W penalty is only at certain pressures and per tyre, btw. This is the TT thread and we wouldn't want any bad maths misinforming anyone's tyre choice.

Wrong again. It's 1.5w per tyre and was running them at 90+ psi.

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Colin_the_Bald in reply to @onyerbike

What I would take from that test is that the tt version is faster and you should whack the pressure up. The load of 42.5 kg is a bit odd as the weight distribution front/rear would be very different. Even @hippy wouldn't quite place 42.5 kg on the front wheel. Also, anyone doing a tt at 18 mph should take up knitting instead.

I'm ancient, we used to use Wolber Piste 18mm tubs whacked up to 160 on fast courses, because someone faster than us said they were quick. We carried a spare tub under the saddle and a frame fitting pump. On a fast 25 course and a fast day we disposed of both, at worst it was 6 miles to a marshal with a car. If you puncture, your race is over anyway on a short tt.

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hippy in reply to @Colin_the_Bald

I tried 20mm Vittoria Diamante Pro on our club course once and they were slower so never bothered running them again. Obviously there were other variables but I didn't like them enough to try again. Think they were at something like 140psi. Bone shaker mode.

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