Chainring Reccomendation for High-Speed Pedal Assist

[chvidgov.bc.ca]

I'm using a Vuelta 60" on my 20" wheeled Cannondale Hooligan. It is nice for pedalling into the mid 20mph range, with a small front motor and an 11 tooth cassette on the back. I did need to improvise a chainkeeper for it, with a pipe clamp and a piece of metal.

 

[jkbrigman]

Phat Bike runs great with the VueltaUSA 53T up front and the 11-28T freewheel. I can usefully pedal up to 35mph. I'm loving the vueltausa parts - they a have a few hundred miles on 'em and are holding up well.

Side note: some are missing the boat if they think your legs offset power draw only as much as they put power in. When you put in 100W, you can reap much more than that in energy saved. I often put in 100W and save about 225-280W. This agrees with the curves shown in the sims.