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3,178 Posts
39 will be better off the line and improve low speed traffic and manuevering ability.
15/38 is stock, 14/38 is the cheap mod for a new bike with a new chain, 15/39 or 40 with a new chain is the way to make the bike more street freindly, and as pat had stated, easier to run tracks with tight/short corners.
15/38 is stock, 14/38 is the cheap mod for a new bike with a new chain, 15/39 or 40 with a new chain is the way to make the bike more street freindly, and as pat had stated, easier to run tracks with tight/short corners.