Sometimes hub-drive bikes come in that have an inboard pad adjuster that is not possible to access. 95% of hub-drives with mechanical brakes are out of adjustment and barely work. So, what is to be done? Here I drilled the rim of the motor for access painted it black and then put a white dot on it to quickly find the access port.

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I am not sure what to think of that. It works and I doubt it compromised the hub, but I probably would have taken a different approach if it were my bike. Most likely I'd pull the caliper off and adjust it while waiting for the new hydraulic brakes to come in.
 
Bend ball end allen key also does the job in my experience
In some cases it is higher than 45 degrees and won't work. The customer is 135 kg and lives on a hill. He couldn't stop. I have shown him how to adjust the inner pads and the notch will make it easy. The ball end 5mm hex worked on his other bike.
 
In some cases it is higher than 45 degrees and won't work. The customer is 135 kg and lives on a hill. He couldn't stop. I have shown him how to adjust the inner pads and the notch will make it easy. The ball end 5mm hex worked on his other bike.
What bike manufacturers make brake adjusters inaccessible? I've had 3 hub-drive bikes with Tektro mechanical brakes. I usually took the proper hex bit from my 3/8" drive set, snapped it on a 6" extension, went to the other side of the bike, and stuck it between the spokes. Straight shot.
 
What bike manufacturers make brake adjusters inaccessible? I've had 3 hub-drive bikes with Tektro mechanical brakes. I usually took the proper hex bit from my 3/8" drive set, snapped it on a 6" extension, went to the other side of the bike, and stuck it between the spokes. Straight shot.
It's not the fault of the brake manufacturer. Hub motors have a much larger diameter than a standard bicycle hub.
 
It's not the fault of the brake manufacturer. Hub motors have a much larger diameter than a standard bicycle hub.
As I say, I've had 3 bikes with hub motors and mechanical brakes. Two had direct-drive motors, with larger diameters than my 750 W geared motor. On each, the adjustor was a straight shot for a 6" driver shaft. I wonder if the problem comes from e-bike manufacturers using disk calipers intended for push bikes.
 
I'd install a larger rotor and have better braking and better access to the adjustment screw instead of hacking things.
Probably less work as well... but that's just me 🙃
 
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That was a $600 bike. It had many problems including a front wheel that would not rotate. It only hit half the gears. The levers went flat to the grips. I did not allow the battery indoors. When he reported the front wheel problem they sent him a second bike. 2 X POS=____? Now back to tools.

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So if the front wheel doesn't rotate.... Why does it need brakes? 🙃
 
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