That's a very personal question Dr Shaw, however I'll forgive your voyeristic tendencies just this once:

At Adcock I warm up on 48x15 on 622x23 tyres. Rollout is 6.83m. 85.5 inch gear. Legs can spin free at low speeds.

During racing I'm running 48x14 for a 7.31m rollout. 92 inch gear. Just over 50kmh at 120rpm. Effective top speed is 65kmh which, BTW, is pretty piss poor given that cruising speed during scratch races is normally 53kmh. I need plenty more power at high cadence. I see overspeed motorpacing in my future.

At DGV I use 50 x 14 for 7.62m rollout, which is about 96 inch gear. 55kmh at 120rpm. Effective top speed is 70kmh.

So why don't I just go to 94 or 96 inch gear at Adcock to get more speed? Wouldn't make me any faster in the long run. I can already feel my legs being 'behind the cadence' on 92 inches. It's like I just can't get over the gear and spin it out. I would probably be better off racing on 90 inches for about 6 weeks.

Enough detail? Good. Now we can all get some sleep