Credible Hulk
Active Member
A while ago I acquired an old cruiser bike which I cleaned and fixed up. It looks beautiful but it has a heavy steel frame, forks, rack, fenders etc. and it's a beast to ride (or walk) on hills. So, I thought I might convert it to an e-bike using a hub motor kit instead.
I do have prior experience with ebikes (an e-fatbike with pedelec and throttle, and an e-scooter with twist throttle only) but have never done a conversion. That's why I'd like some input from people who have experience converting older bicycles to e-bikes.
I'd like to preserve the look of the bike as much as possible while still creating a fun and safe e-bike. Here's what the bike looks like:
So far besides cleaning it up and lubricating it, the only change I've made is to switch to cream coloured smooth tread city tires. This bike will be ridden primarily on city streets and paved bike trails. I live in an area with some hills, including a few steep ones.
My first concern is brakes. This bike doesn't support disc brakes, because there are no eyelets on the forks to support the activator and the wheels don't support the discs. I plan to get a hub motor/wheel and I could put a disc on that wheel, but again - no eyelets on the forks. Could the activator be installed using hose clips and some kind of adapter?
I've read that the old style caliper brakes can work on an ebike with the right pads if they're in good shape, the cables are good, and they're properly adjusted. My wheel rims are alloy and pretty heavy and sturdy, and the brake calipers are also heavy and solid. Another option might be a disc brake on the wheel with the motor, and caliper on the other wheel. I'm thinking this might work better if the motor/disk brake were on the front wheel. For brake pads (caliper) I read that Kool Stop Dual-Compound brake pads are good for higher speed.
Second concern is the best wheel for the motor. I'm not interested in a mid drive (looks horrible on this style of bike and I'm afraid to try installing one). Right now I'm leaning heavily towards putting it on the front wheel.
Reasons:
- bike has a long, heavy steel rack on the back
- I plan to install the battery on the rack because there isn't much space for it on the frame
- since it's a cruiser the rider sits upright rather than leaning forward
So I thought it might be better to put the motor on the front wheel to balance the weight of the bike. It will also be easier to install, however I'm willing to install it on the back wheel if that would be better. On the front wheel I would use two torque arms. I'm not sure if any would be needed on the back wheel (with the motor on the front). Both of the ebikes I've had so far had rear wheel motors, so I'm wondering about the learning curve to drive a front wheel motor ebike.
For the motor I've decided on this one, it's available for front or rear hubs. It's called a Magic Pie Vector. The motor is brushless gearless. Specs:
Built in fan
Improved heat dissipating
Easy Disk Brake mounting
Major improvement in quality of wiring harness and plugs
Motor:
24v- 60v
250W – 1500W
Brushless Gearless Hub Motor
High Efficiency / High Torque
Super Slim for common bikes
Controller:
Vector Controller with Sine Wave Technology and Bluetooth!
24v/36v/48v Multi voltage
Max 25a Continuous power
Upgraded Mosfet
Regenerative Braking
Easily replaceable by plug
PC programmable
Forward/Reverse
For the battery I'm thinking of a 48V 13.6AH Panasonic Shark Pack because of the weight of the bike and the hills in my area. I also tend to travel fairly long distances (like running multiple errands) so I need a bit of range.
Pedelec?
I prefer throttle only, but in my city all ebikes using bike infrastructure must be pedelecs. To replace the bottom bracket to install a sensor, is a torque wrench needed? I don't have one and they're expensive, so I'd need to budget for it.
Also, has anyone ever used one of these sensors?
https://www.goldenmotor.bike/product/pedelec-2/
It's simple but compatible with the motor I want. I can get a "smart screen" which works with this motor's controller and allows me to control the level of this pedelec.
That's all I can think of for now. Sorry about the novel but I thought it would make more sense to include my questions in a single thread.
I do have prior experience with ebikes (an e-fatbike with pedelec and throttle, and an e-scooter with twist throttle only) but have never done a conversion. That's why I'd like some input from people who have experience converting older bicycles to e-bikes.
I'd like to preserve the look of the bike as much as possible while still creating a fun and safe e-bike. Here's what the bike looks like:
So far besides cleaning it up and lubricating it, the only change I've made is to switch to cream coloured smooth tread city tires. This bike will be ridden primarily on city streets and paved bike trails. I live in an area with some hills, including a few steep ones.
My first concern is brakes. This bike doesn't support disc brakes, because there are no eyelets on the forks to support the activator and the wheels don't support the discs. I plan to get a hub motor/wheel and I could put a disc on that wheel, but again - no eyelets on the forks. Could the activator be installed using hose clips and some kind of adapter?
I've read that the old style caliper brakes can work on an ebike with the right pads if they're in good shape, the cables are good, and they're properly adjusted. My wheel rims are alloy and pretty heavy and sturdy, and the brake calipers are also heavy and solid. Another option might be a disc brake on the wheel with the motor, and caliper on the other wheel. I'm thinking this might work better if the motor/disk brake were on the front wheel. For brake pads (caliper) I read that Kool Stop Dual-Compound brake pads are good for higher speed.
Second concern is the best wheel for the motor. I'm not interested in a mid drive (looks horrible on this style of bike and I'm afraid to try installing one). Right now I'm leaning heavily towards putting it on the front wheel.
Reasons:
- bike has a long, heavy steel rack on the back
- I plan to install the battery on the rack because there isn't much space for it on the frame
- since it's a cruiser the rider sits upright rather than leaning forward
So I thought it might be better to put the motor on the front wheel to balance the weight of the bike. It will also be easier to install, however I'm willing to install it on the back wheel if that would be better. On the front wheel I would use two torque arms. I'm not sure if any would be needed on the back wheel (with the motor on the front). Both of the ebikes I've had so far had rear wheel motors, so I'm wondering about the learning curve to drive a front wheel motor ebike.
For the motor I've decided on this one, it's available for front or rear hubs. It's called a Magic Pie Vector. The motor is brushless gearless. Specs:
Built in fan
Improved heat dissipating
Easy Disk Brake mounting
Major improvement in quality of wiring harness and plugs
Motor:
24v- 60v
250W – 1500W
Brushless Gearless Hub Motor
High Efficiency / High Torque
Super Slim for common bikes
Controller:
Vector Controller with Sine Wave Technology and Bluetooth!
24v/36v/48v Multi voltage
Max 25a Continuous power
Upgraded Mosfet
Regenerative Braking
Easily replaceable by plug
PC programmable
Forward/Reverse
For the battery I'm thinking of a 48V 13.6AH Panasonic Shark Pack because of the weight of the bike and the hills in my area. I also tend to travel fairly long distances (like running multiple errands) so I need a bit of range.
Pedelec?
I prefer throttle only, but in my city all ebikes using bike infrastructure must be pedelecs. To replace the bottom bracket to install a sensor, is a torque wrench needed? I don't have one and they're expensive, so I'd need to budget for it.
Also, has anyone ever used one of these sensors?
https://www.goldenmotor.bike/product/pedelec-2/
It's simple but compatible with the motor I want. I can get a "smart screen" which works with this motor's controller and allows me to control the level of this pedelec.
That's all I can think of for now. Sorry about the novel but I thought it would make more sense to include my questions in a single thread.