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Latest update. I ended up dropping this bike in at Halfords for repair. They said it needed a new torque converter. (£31) A week later they rung me and said the new convertor had made no difference and it needed an new ECU. (£160) A week later they had fitted the new ECU and it was ok...

Have made more progress. I have received my chain hub splitter and removed it. Stripped it down and cleaned it, its all like new. Removed the torque sensor completely. It is like new. see pic. If I turn the handlebar readout on with it removed, the error 21 has gone ! Does this sensor need...

Have owned a Carrera Subway electric bike for 4 years. It has been absolutely fantastic.

Have owned a Carrera Subway electric bike for 4 years. It has been absolutely fantastic. After charging the battery a few days ago I now get a "21" error when switching on. I searched YouTube and a gentleman was recommending I check the torque converter, behind the crank. Checked it over and...

Hello lads .. thanks for the interest. The next day I rode the bike to work ( am a metal machinist). I removed the lower panel and undid the torque converter. I cleaned and blew it out with our compressed air. It is now longer surging. This morning when I powered up the bike moved forward...

Its been very wet for the last 6 weeks. I take the car in the heavy rain......but light rain I ride it.

I'm Keith. I am 65 and have push biked to my last 2 work places (both about a mile away) for the last 30 years. 12 months I purchased a Carrara Subway electric bike. It has been absolutely fantastic. However on the journey home this afternoon I encountered a major problem. Half way home she...