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  # 27  
Old 29-10-10, 17:52
Jinxit Jinxit is offline
Junior XT-Moto
 
Join Date: Mar 2010
Location: Biggleswade
Posts: 29
Jinxit is on a distinguished road
Quote:
Originally Posted by RickM View Post
Will await your views with interest jinxit! I didn't want to fit a 140/80 due to the higher gearing effect and reduced clearance between tyre and swinging arm.
Incidentally, a prominant supplier assured me that the 140/80 made no difference to tyre diameter because the "80" was an absolute measurement (80mm) and not a percentage of tyre width!!

My new supplier is Mick at tyre-finder.co.uk.
Mmn. I went for the 140 as a) it was in stock and b) the mitas is quite a flat tyre and squashing it onto a narower rim should give it a bit more roundness. My theroy any way.
It is a bit naughty telling you that the profile is not related to the tyre width though. My calculations give a 8mm difference wich is only the tred depth so not concerned there. I run a 14 tooth front sprocket anyway so shouldn't be a problem. It will be interesting to see if the speedo changes any. I have a speedo healer so it will be obvious.