u/Super-Frame677

It was like the sky was on fire, it was insane.

Bike specs for those who care:

72v 3kw motor from NBPower running an 80a controller they included, so 5kw.

72v 20ah Amorge battery with Eve 50PL cells, capable of 200a continuous 240a peak.

Eventually I plan on getting a Fardriver ND72360 and Statorade to push this build even further, but so far it's a ton of fun. Hit 95kmh the other day, downhill with wind at my back. Normally I get 80-85kmh flat ground.

Literally looked like the sky was on fire.

I'm looking into upgrading the tires on my 72v 3000w (running 5000w) converted MTB since I frequently go fast and I'm worried about these current ones. I'd still want knobby tires since I do go off road occasionally, but I need them to be safe for 70+ kmh on pavement as well. Any help is appreciated.

Oh and cheaper is better for me. I know that cheap and good don't usually go together, but still.

After several long months of waiting for things to arrive, I've finally got my ebike conversion kit fully built! It rides awesome, and seems to top out around 80kmh weirdly enough. I thought I'd be able to hit 90 or higher, but it's totally fine. If anyone has any explanation please let me know, but honestly 80kmh is already too much for a bike frame so I don't need more.

Specs are as follows.

72v 3000w motor kit from NBPower with an 80a controller.

Custom 72v 20ah battery from Amorge with Eve 50PL cells. This thing is crazy, claimed 200a continuous 240a peak power which I'll never use. It's nice having an overkill battery because there's barely any voltage sag and it doesn't get hot at all even in the battery bag.

And of course a pair of Grin Tech v6 torque arms to keep my bike in one piece lol.

Got the Grin Tech v6 torque arms installed, now I'm just waiting on the battery and battery bag. Should be about another week till they're here, then I can finally ride lol. I definitely still need to figure a few things out, such as a proper seat mount that isn't zip ties and bolts through plastic... but overall it's come a long way and I'm happy with it.

I'm getting two Grin Tech v6 torque arms and ideally I'd like to fit them both like in the first photo, but one side doesn't fit because of the derailleur. Can I mount that one like in the second photo? I know it's not ideal since the motor torque will then be trying to pull it away from the frame, but would it still work properly? If the hose clamps are too weak for that orientation I could also try to source a custom steel clamping bracket that's more sturdy. Any help is appreciated.

Edit: I should add that this is for a 3000w motor with an 80a controller, so 5000w.

Amorge battery hasn't arrived yet so I'm trying it out with Makita batteries haha, definitely fun so far though! Torque is really good and it feels nice and stable to ride. I'll clean it up (remove all the tape and such) when the battery gets here.

It's uh... something special alright... I got the motor kit a little while ago and Amorge hasn't even made the battery yet let alone shipped it out, so I decided I'd try it out with 4 Makita batteries in series. They get a little hot but I've limited the controller to 40a for now and it's already insane, I hit 70kmh (43mph) flat ground today. About 10 minutes of cruising around before it's dead, but still pretty fun to try it out before the real battery arrives lol. Really happy though, I've been wanting a bike for over a year now and finally got it. I'll definitely flush everything out looks wise (such as the seat zip ties and all the tape...) when the battery gets here lol.

I realize my kits stock torque arms were terrible with a single hose clamp and the way I had them they could easily slip, so I modified them (one currently done, I'll wait for some feedback before I do the other one) to bolt right into an existing hole on my frame. I filed a bit off the side of the arm so it could clear the axle bolt. Does this seem like it would be okay with two like this on a 3kw kit for a month or so? I'll order Grin v6 torque arms soonish, I was just hoping these could work in the meantime. Also this is my third post within two days about torque arms, I'm sorry lol. Any advice is appreciated.

I finally got my NBPower 3kw kit a few days ago and I've been trying it out a bit with 4 18v Makita drill batteries in series (janky as hell, I know...) since the Amorge battery isn't even shipped yet. So anyways before the proper battery gets here and I ride this daily, do I need better torque arms? I've got one of these on each side. Controller is 80a currently limited to 40a so I don't fry these makita batteries, but when I get the proper battery I'm going to want the full 80a. What thickness do the arms need to be? I'm just trying to be as safe as I reasonably can be with 5kw strapped to a bicycle lol...

Also I tightened the hose clamp to the point where it bent the torque arms towards the frame because they wouldn't fit properly any other way. Had to add spacers before the torque arms because my dropout area is weird.