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Old 02-02-2013, 06:23 PM   #32893
thumpididump
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Joined: Jul 2009
Location: Germany
Oddometer: 2,353
54R refers to the load index (54) and speed rating (R)


load index "54" is up to 467 lbs
speed rating "R" is up to 106 mph


Some references:

http://www.rockymountainatvmc.com/do...ad-Ratings.pdf

http://www.tirerack.com/tires/tirete....jsp?techid=35
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