3000W HUB MOTOR + 72V 25AH + 80a CONTROLLER BUILD?!?

[Jezza68]

Hi all, I recently bought a 3000w hub motor kit paired with a 80a controller and a 72v 25ah battery (with 80a bms). I am currently converting this onto a Giant Talon 1 mtb hardtail frame. Firstly wanted to know if there is anything that I should know with this kind of build due to me being fairly new to this. Will this sort of pairing work? I did a test run with some mates the other day and figured out i have a problem with my brake rotor bolts rubbing into my phase wires. As well as i also somehow cracked/chipped half of the top end of the dropout. Is there anyway to fix either of these issues???

Any help and insight from anyone would be greatly appreciated.

Cheers, Jedd

 

[scianiac]

Some pictures would help, what kind of torque arms are you using?

 

[Jezza68]

Some pictures would help, what kind of torque arms are you using?

Just standard torque arms, what sort of photos are you after?

 

[gromike]

What frame?
A picture of your drop-outs with the condition that you describe would be most informative.

 

[Jezza68]

here’s some pictures. My frame is a medium Giant Talon 1 2022 HardtailView attachment 357496

 

[Jezza68]

 

[AGS]

You are going to need a much stronger frame for that motor and a brake disk spacer to stop the wiring from rubbing on the brake disc screws.

What torque arms did you fit? I can’t see where you have drilled a retaining hole for the torque arms.

If it is the motor that I think you have then a disc brake spacer like this is needed to stop the cable from chaffing.



And torque arms similar to these to stop the frame from breaking.

 

[99t4]

Yeah, that dropout is too far gone for a 3000W/80A build.

Depending on your skills, you may be able to fabricate some bolt-on dropout reinforcement/TA combos.

Examples:

An off the shelf product like this might secure the axle in the broken dropout sufficiently: