ScooterMan101
1 MW
There are a few problems with the MAC 500 Rear Hub Motor, and perhaps other Rear Hub Motors as well.
Problem :
1) The Rear Disc Brake Body Rubs on the Motor Hub, I bought a bike to convert that has the cheep mechanical disc brakes, and when I put in the MAC Hub Motor into the dropouts it would not go in , the Body of the Disc Brake is too wide ( 32mm from the innermost part of the Disc Caliper to where it bolts onto the frame .
So I went to my parts bin and pulled out a Avid BB7 Mechanical Disc Brake, tried to installed it , only to have the same problem it is also 34 mm wide . from the innermost part where the spokes are, or rather , where the hub motor body is .
What Rear Disc Caliper have you found that is 25mm or even 20mm inner body and Bracket width ?
Note that my bike has a all in one Shifter/Brake Lever, so a mechanical/cable disc brake is preferable over a Hydraulic Disc , but I would change out the Brake Lever/Shifter levers if I had to .
2) The Hub width is too wide to accept a 8 or 9 speed freewheel, First I bought a Sunrace MFEX9 9 speed freewheel, which by the way is what Sunrace says is made for electric bicycles, only to find out that the hub body interferes with the back of the Sunrace 9 speed freewheel, and I would have to use spacers so that the outermost/smallest cog does not rub on / have clearance with the frame .
I did get a 8 speed cog from Sunrace , but then bought a 8 speed bike to work , and came across the problem listed above with it having a combined
Shifter / Brake lever.
So have you found a 9 speed freewheel that works on the Mac 500 Rear Hub Motor ?
It seems like we need a thread on these two problems with Hub Motors .
Problem :
1) The Rear Disc Brake Body Rubs on the Motor Hub, I bought a bike to convert that has the cheep mechanical disc brakes, and when I put in the MAC Hub Motor into the dropouts it would not go in , the Body of the Disc Brake is too wide ( 32mm from the innermost part of the Disc Caliper to where it bolts onto the frame .
So I went to my parts bin and pulled out a Avid BB7 Mechanical Disc Brake, tried to installed it , only to have the same problem it is also 34 mm wide . from the innermost part where the spokes are, or rather , where the hub motor body is .
What Rear Disc Caliper have you found that is 25mm or even 20mm inner body and Bracket width ?
Note that my bike has a all in one Shifter/Brake Lever, so a mechanical/cable disc brake is preferable over a Hydraulic Disc , but I would change out the Brake Lever/Shifter levers if I had to .
2) The Hub width is too wide to accept a 8 or 9 speed freewheel, First I bought a Sunrace MFEX9 9 speed freewheel, which by the way is what Sunrace says is made for electric bicycles, only to find out that the hub body interferes with the back of the Sunrace 9 speed freewheel, and I would have to use spacers so that the outermost/smallest cog does not rub on / have clearance with the frame .
I did get a 8 speed cog from Sunrace , but then bought a 8 speed bike to work , and came across the problem listed above with it having a combined
Shifter / Brake lever.
So have you found a 9 speed freewheel that works on the Mac 500 Rear Hub Motor ?
It seems like we need a thread on these two problems with Hub Motors .