Thread: rear tyre widht in XTX
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  # 9  
Old 09-07-10, 05:44
miniroot miniroot is offline
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Quote:
Originally Posted by Powerfreak View Post
What does the ZR bit mean in this tyre size ?
'Z' is the speed rating (240kph+?), 'R' for radial construction.

http://www.carbibles.com/tyre_bible.html