JRA...
Join Date: Oct 2003
Location: philly
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Bikes: trek 520 & 736, DeRosa Professional, Fuji Professional, Raleigh International 3-speed, Saronni (any info people?), Humber 3-speed, Raleigh Sports, Carlton Grand Prix coming soon!
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assuming the old spindle was symmetrical (which it probably was on 600) you're talking a 1.5 mm difference per side.