Quote:
Originally Posted by Ausinanas
I'm no expert but going off what i've read in FAST BIKES
shouldn't it be the other way round ?
31psi for hot conditions and building up psi for colder wheather???
with maybe 1psi more in the front than the rear??
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there is an ideal temperature where the tyre compound will be at its stickiest
there is an ideal pressure where tyres shape and level of carcass flex is perfect
when ambient/track surface temperatures are not ideal or water is present (which has an incredible ability to suck heat out of a tyre) then anything you do will be a compromise
if tyre pressure is too low its shape will be sacrificed
if tyre temperature is too low it wont stick, if too high it will melt also not sticking
when its cold or raining i drop the pressure to increase carcass flex which increases the tyres temperature
when its hot, i increase the pressure to reduce carcass flex, to reduce the tyre temperature
thats my thinking anyway, it is my understanding that all of a tyres heat build up comes from carcass flex that occurs as a tyre with weight pressing down on it rolls down the road at speed, at least until its hot and sticky enough to start generating heat from friction that only comes when banked over (without sliding off the road), accelerating hard without spinning or braking hard without sliding.
edit: if you want to maximise milage of your tyres for street riding and not square them off so fast then yes, lower pressure in summer and higher in winter. but we are talking about sliding bikes around tearing tyres up not poontling along the river worrying about how many miles we can get out of them
