I put a 17t on the front shortly after getting the Hawk, and installed the 45t rear after around 700 miles. I really like the taller gearing, the bike is much smoother at lower revs, and is much more pleasant to ride. thinking of going lower on the rear, maybe a 42, curious if the 39 would be too low for occasional off road....
The OEM chain seems to be working fine for me, fwiw...
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