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Discussion Starter · #1 ·
Considering turning an 03 450sx into street legal supermoto.

Bike is a hybrid with 450 exc tranny and e-start, and 525 piston and jug.

Pretty sure the swingarm is still the 450sx.

Want to know if a 5.0 rear rim will fit with a 160 tire? Will still probably switch back and forth to dirt trim and am not good enough to be able to tell the difference riding between a 150 on a 4.25 and a 160 on a 5.0, but would like to have the 5.0 if it is an easy fit.
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