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There is no such limitation for hub motors. The Stromer, for example, has a 600W hub motor and is a Class 3 bike. Electric motors work by generating a magnetic field, via coils, that creates a force against a series of earth magnets. That force will be present as long as electricity is being...

I just got the email from Orbea too, labeled "THE NEW ORBEA GAIN IS HERE". From a quick review, all of the enhancements appear to be incremental, with no substantial changes to the important specs (torque, range, weight). Most critically for me, the US versions are still limited to 20mph. I...

Tale of two rides, both ~35 miles long, a few days apart, one on a mix of rollers, small hills and flats, and the other with more long and challenging climbs in N. Georgia. RIDE #1 Bike Model: M20i, 2019, US version (20mph) Battery Extender: No Ride Mode: level 2/orange for entire ride. I've...

The Park 5.2H will work on any Shimano lock ring, on any bike. The difference is that it is a single piece unit, and the back is open, as you can see above, allowing greater clearance. You will still also need a chain whip to provide counter-rotational force to unscrew the lock ring.

Hi. Gain M20i here. If you are DIY on cassette removal, you may want to try it with your existing tools on your Gain. My Park chain whip with Park adaptor (FR-5.2) for Shimano doesn't work. That's because the FR adaptor doesn't have enough clearance. Because the rear hub is not a removable...

Bike Model: M20i, 2019, US version (20mph) Battery Extender: No Ride Mode: level 1/green for entire ride, stock motor settings. Rider Weight: 175 lbs Height: 5'11" Skill Level: Fast Recreational Rider, long time roadie. Pedaling style: High-ish cadence, ~85 RPM Ride Location: Roswell...