Tyre PSI

leigh_boy said:
because the tyre gets hot, and when things heat up they expand.
also stops the tyre from blueing and tearing.
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Exactly, and is also the reason you'd start with a higher pressure in the wet as the tyres don't generate as much heat.

I'm slightly staggered that someone would believe the maximum pressure rating on the sidewall is what you should actually inflate your tyres up to :eek:

For road tyres most of the decent tyre manufacturers will have recommended pressures for most models of bike, use these in preference to the manufacturers numbers unless you are using the OEM tyres.
 
Dogbreath said:
For road tyres most of the decent tyre manufacturers will have recommended pressures for most models of bike, use these in preference to the manufacturers numbers unless you are using the OEM tyres.
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^^^^^^^^^
This

My ducati 1098s came with Corsa's as standard, 1.9bar front and 2.0bar rear.
When i swapped them them out for 2ct's, Michelin website said 2.1bar front and 2.2bar rear. They run superb at those pressures on the road, very grippy and good wear rates. If your using the tyres on the road, always set the pressures to the tyre makers recommendation for the bike they are on. Not to the bike manufacturers recommendation.
 
Look at what tyre you have, including all the numbers and letters after the name, then go look it up on that particular manufacturer's website. Most have that information.

Even a few psi off can seriously affect the tyre's performance.

I will use what the tyre manufacturer says over what the bike manufacturer says because they made these tyres specifically to fit my bike (and in a couple of cases some are designed ONLY for this exact bike).

I've heard several others whine about how other riders simply 'don't know better'... Manufacturers have spent millions developing technology to work a specific way on which I'm hooning down the road/racetrack at up to 160mph and on which my life seriously depends - These riders have not, yet they think they know better?
I remain dubious... ;)
 
tl45 said:
That's the case with racing wets too, recommended pressures are higher than equivalent dry tyres. Reason being that it helps the tyre hold it's shape better so the edges of tread blocks are able to dig in better, and also for the tyre to displace water as designed.

Rough example from memory with Dunplops, D208GP's 30/29 compared to wets ran at 34/34.
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Wets always run lower than dry tyres :confused:

You need to keep the carcass warm, normal pressure tend to lead to overheating unless you're riding a monsoon. But that's track use anyway.

Road use I use 36/42, sometimes I drop to 34/40. I've found a bit better feedback and grip at 34/40 using PR3s and Pilot Power 3s.
 
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