Join Date: Jun 2007
Location: A Coffin Called Earth. or Toronto, ON
Bikes: Bianchi, Miyata, Dahon, Rossin
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quite a bit.
I think the steel rims from an R20 are about 1kg each.
the entire thing is quite heavy. Aside from rims, you can save weight by not using the SA-3sp hub, another 1.5kg alone, seat post, saddle, handle bars and cranks.
the stock parts are almost all steel, so changing any of those to an aluminum part will save weight greatly.