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tyre-pressures [2009/04/29 16:50] (current)
80.177.31.81 created
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 +===== 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 ยท Last modified: 2009/04/29 16:50 by 80.177.31.81