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tyre-pressures

===== Tyre Contact Patch ===== When radials first came out for public consumption we were told by the tyre techs to run pressures for the rise in pressure from cold to hot... sizes up to a 120 width tyre........10% rise sizes:-120-160......................15% rise sizes :- 160 and up..the percentage is one tenth of the width (160..rise 16%...180-rise 18%) These were recommendations for best wear and grip....other circumstances may warrant alterations.(ie carring a passenger ) I routinely run less than the above when roads and air temps are on the cool end...just for tire warmup and compliance. I think it's worth experimenting for side wind handling. ** Above Notes By RR ** ---- == Notes added by Y-G == One trick is to go ride the bike get the tyres upto temp and then ride thro a patch of sand thrown on a smooth floor and see how wide the sand patch is on front & back tyre. At 180 lb in body weight of rider and hot tyres I like to se between 1.5 - 1.0" sand lines on the tyres. Measure the pressure HOT If you do this again when the tyres are cold ie look at a fresh sand line on the tyres & measure the tyre pressures you will get what is right for you. Remember that **"THE BOOK"** is only a recommended pressure not what is right for you.(you may weigh 140lbs all wet or 280lbs bone dry :-}

tyre-pressures.txt · Last modified: 2020/10/19 11:51 (external edit)