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We're doing lots of night cycling on dark lanes, and I'm getting fed up with remembering to keep lights charged on my wife's 3 year old Carrera Crossfire. There's a USB output socket under the speedo, but the manual states that the 5 volt output is only 0.5 amps. The 2.5 watts available would be...

I tried a very short ride on a friend's Kalkhoff. It has a bottom bracket motor so it drives through the gears, whereas the Crossfire's hub motor is effectively a single speed and not so good at steep hills. The Kalkhoff seemed slightly noisier and less refined, but is better-equipped with...

Don't think the chain is anything unusual, it should be a standard derailleur 1/2" x 3/32". Specifying a heavier chain (eg 1/8" width as used on single speeds) wouldn't be logical as the motor drives the wheel directly so the chain experiences no more than normal cycling demands. Regarding the...

Thanks to all for excellent info on this forum. After much research we've just bought a Crossfire, and very pleased we are after 100 miles. A few random observations, hope they're of interest: 1. We bought the "large ladies" 18" frame which fits my wife at 5ft 4" and easily accommodates me at...