D
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I won't insert photos of the bike just yet because it's the same as those that you'll see on any website. I decided to try my spare Cute Q100 rear motor that I bought from BMS battery. I have two: a 24v and a 36v. I'll use the 24v, but run it at 36v because they're both 201rpm versions for 26" wheels. A rough calculation says that at 24v it'll do about 12mph and at 36v about 18mph.
I laid it in place and it overlapped the drop-outs by about 5mm, but can easily be sprung in. I checked the alignment and it's about 2 to 3mm off centre.
Next, I assembled the free-wheel to check that it fits OK. I only have a 6 speed with 14T top gear. It's 32mm thick and there's enough room for 40mm. 14T is no good. On my mountain bike, my comfortable top gear pedalling is about 17.5 mph with 52/14T gears, so the Dahon with 14/52T would be about 13.7mph, which is a bit slow with electric assist. It's not that the bike would go slower, it means that I'd be pedalling a lot faster, which I don't want. A quick call to Cyclezee and hopefully he can provide an 11T 7 speed, which'll give top gear pedalling at 17.5mph, which is about the top speed of the motor. we think this free-wheel is 36mm thick, so I can shorten the spacer bush on the motor by 4mm so that I don't have to spring the drop-outs and the wheel will be more central (lucky that the wheel is off-centre the right way).
Now I need a rim and spokes. I need to talk to Catsnapper.
I laid it in place and it overlapped the drop-outs by about 5mm, but can easily be sprung in. I checked the alignment and it's about 2 to 3mm off centre.
Next, I assembled the free-wheel to check that it fits OK. I only have a 6 speed with 14T top gear. It's 32mm thick and there's enough room for 40mm. 14T is no good. On my mountain bike, my comfortable top gear pedalling is about 17.5 mph with 52/14T gears, so the Dahon with 14/52T would be about 13.7mph, which is a bit slow with electric assist. It's not that the bike would go slower, it means that I'd be pedalling a lot faster, which I don't want. A quick call to Cyclezee and hopefully he can provide an 11T 7 speed, which'll give top gear pedalling at 17.5mph, which is about the top speed of the motor. we think this free-wheel is 36mm thick, so I can shorten the spacer bush on the motor by 4mm so that I don't have to spring the drop-outs and the wheel will be more central (lucky that the wheel is off-centre the right way).
Now I need a rim and spokes. I need to talk to Catsnapper.