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Old 05-08-2017, 05:00 PM   #11
JerryHawk250   JerryHawk250 is offline
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Quote:
Originally Posted by Megadan View Post
I was actually wondering how a 17/40 combo would do for on-road use. What RPM do you sit at in 5th at 60-mph? I would love to gear the bike to sit right at 5400-5600rpm (right on the torque peak) at 60 for street use, and simply carry around the 15 tooth front for some trail cruising. For now I am doing the 17/45, but I have considered going with a 42 rear. If my math is right for the transmission ratios, in 5th at 60 with a 110/100-18 tire a 17/42 should sit around 5600rpm at 62mph. Swapping to the 15 with the 42 would actually gear it a bit shorter than a 17/45 combo, which should do fine for most of the trails around my neck of the woods.
I didn't really pay attention to the exact rpm's but I think it was between 5800-6000 rpm's. I was too busy enjoying the ride.
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