You are reading a single comment by @Five-Hats and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
@Five-Hats
I have got a B&M USB-werk which is fine as long as you're going at a reasonable speed. 25km/h along a nice flat river path=full usb power. 10km/h up a mountain=no power at all. But I expect that is the same for all devices.