Well it's all fitted now but not being used as the off side crank arm squashes the peddle assist sensor to a point where the crank arm barely turns by hand, way too much pressure on the sensor to take it out riding. I would swap out the bottom bracket for one with a longer axle but it's stuck in the frame. So far approx £400 spent and it's not been used onse hehe. My only idea to make it work is to take an angle grinder to the inner face of the crank arm and grind off 2mm. I'm not happy about doing this as it's a really nice original Shimano unit. The bike has been shoved to the back of the garage for now.
Retro E-Bike conversion.
- Thread starter Trebz
- Start date
Got a pic?
Depending on the motor the pedal sensor is not absolutely necessary. Sometimes it can even remove any speed limiters as the bike's electronics believe the bike is always travelling at 0 mph
For stuck bottom brackets, I've found nothing can resist an impact wrench. I keep one just for that job now.
Might start here
ebikes.ca
ebikes.ca
Personally I’ve only built mid drive motor Ebikes where after brakes and placing the extra mass it’s the chain line and wheel strength that are most important.
Futility of Motor Power Ratings
"There's no such thing as a rated watt!" Read here for why we don't advertise a simple power rating for the motors we sell. Also, have a look at our Youtube video where Justin talks about the power to propel bicycles in <a href="https://www.youtube.com/watch?v=ALde6zhLPs0">"School of Watts"</a>.
ebikes.ca
Motor Simulator - Tools
Our ebike motor simulator allows you to easily simulate the different performance characteristics of different ebike setups - with a wide selection of hub motors modeled, and the ability to add custom batteries and controllers and set a wide variety of vehicle parameters you'll be able to see...
ebikes.ca
Personally I’ve only built mid drive motor Ebikes where after brakes and placing the extra mass it’s the chain line and wheel strength that are most important.
Retrorockit
Old School Hero
Grin technology in Canada is a good resource for hubmotor info. Actual engineers there.
I see links to them just above this, but I'll leave it in to 2nd the motion.
In fact I just looked there and they're overstocked on their smaller hubmotor kits because every one is buying their own all axle motor instead. So they're offering 30% off on not just the motors, but whole kits until their inventory levlels off.
FWIW Avid BB7 cable discs can handle anything your likely to encounter at 250W. I started a thread here on them.
www.retrobike.co.uk
They'll be fine as is at that level, but upgrades can be added as you go.
In fact I just looked there and they're overstocked on their smaller hubmotor kits because every one is buying their own all axle motor instead. So they're offering 30% off on not just the motors, but whole kits until their inventory levlels off.
Avid BB7s in the modern world.
My 2004 Gary Fisher Solstice 26" comfort bike ahd Avid BB7s added to it when new. It's also had a 1500W motor a few years ago. The BB7s are still there. But the stress of the motor led me to a few upgradesthat I feel keep them on par with all but the be$t hydraulics. First off there are 2 series...
www.retrobike.co.uk
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