I weighed my wheels (standard and Magtek) a couple years ago and I thought I posted the results. You might do a search. I just weighed my RS wheels and they are silly light! The tire weigh almost three times as much. I have a front magtek on the shelf if you want me to weigh it.
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james
Its not how fast you go...Its how you go fast.
MC21 Rothmans
RS250
RC31
CRF250X
748R
Porsche (many)
http://members.rennlist.com/j911brick/rennlist3_002.htm