I run a 2807 in a 29" wheel and I gt about 40-50Wh/mile with varying speeds all the way up to 38mph (tops out at 40mph with 66V nominal). I run cooling holes,100A phase current, 3.5kW peak battery power.... It's fun. The motor smells sometimes. I built it into a velocity chukker because Chinese rim came loose every ride. Actually, if youre looking for a great lace job, I'll sell u my motor if u want and u can swap in the 2810 or 2808... The windings are about shot and this motor has a bad history. I'm waiting for the cromotor to arrive. Rim and spoke job is solid.almost hitting 800 miles and is still perfectly true? I think the 2808 would've been more appropriate for my needs.