27-08-2013, 06:23am
(26-08-2013, 11:10pm)aussiemonster Wrote: For a road rider, on road tyres, another way to look at it is this.I went with 30/30 and they came in after the first session with 32/34. So I brought them back to 30/30 and never touched them again. I think you're right, and I will play around next time when I can get some lap times to compare.
Tyre pressure increases with heat (hot air expands), on road tyres you're looking to drop the pressure enough so that when it heats up, the pressure is the roughly same as your normal road riding pressure. Depending on how hard you ride, this could be 3 to 5 psi front and rear or maybe a little more.
You then need to measure the pressure ASAP when you come in at the end of the session to check what the pressure is when hot and adjust the pressure as required to be similar to your road riding pressures.
The advantage of this (for a road rider) is that the bike and tyres will feel much the same as when you're riding on the road. It's what I've worked to when I've gone to the track and always provides consistent feel and no surprises.
It's also a safe way to start, and you can then play around with the pressures more as you become more experienced if you want to.