250w Ebike Kit with KT Controller

[azy77]

Thanks for all the input guys. That's a real bummer about the shallow dropouts on the carrera vengeance. I'm going to have to find some time to look into this a bit more.

Appreciate the breakdown on the different types of setup and the LCD's. From all the input so far, I reckon it will be a KT controller I go for. When and with what and from where I don't know yet.

 

[Cadence]

I've just fitted a torque arm to a Carrera Subway, which looks to have the same drop outs as the Vengeance. There are lots of them on eBay, but the one I bought is particularly neat as it uses the threaded mudguard hole. In my case I used a longer bolt to fit a mudguard and rear rack as well using the same hole. I've also fitted one to my wife's Pendleton Brooke. Both needed a very small amount of filing to deepen the drop outs slightly. You only need to fit one, on the non-drive side.

E Bike Torque Arm Set Fit Rear Motor M12 M14 M16 Axle UK Universal High Strength Carrera, Trek, Voodoo, Boardman. – E Bike Power Uk

ebikepoweruk.com

 

[saneagle]

Thanks for all the input guys. That's a real bummer about the shallow dropouts on the carrera vengeance. I'm going to have to find some time to look into this a bit more.

Appreciate the breakdown on the different types of setup and the LCD's. From all the input so far, I reckon it will be a KT controller I go for. When and with what and from where I don't know yet.

I've fitted motors to at least three of those frames, and never had any issues. The dropouts are the same as any other frame. Whenever you fit an ebike kit to any bike, there are always some minor adjustments you have to do to get it right. Of course, some people are unable to recognise that their installation is sub-standard, and they're happy in their ignorance.

I think about all those guys fitting Swytch kits after watching the video on how to fit it to any bike in 5 minutes. You see upside-down axles hardly fitting inside spindly aluminium dropouts. I wonder how many of those guys did face plants after their wheel span out of the drop-outs? I can guarantee that there were at least some. If Swytch took the time to explain all the ins and outs of different forks and the different fitting problems, everybody would be too scared to fit one of their kits.

 

[Nealh]

I have had to file /dremmel nearly all of my bike drop outs over the years , it is one bit of crucial info kit suppliers omit and for a lot of buyers would be beyond their capabilities.

 

[azy77]

I've fitted motors to at least three of those frames, and never had any issues. The dropouts are the same as any other frame. Whenever you fit an ebike kit to any bike, there are always some minor adjustments you have to do to get it right. Of course, some people are unable to recognise that their installation is sub-standard, and they're happy in their ignorance.

I think about all those guys fitting Swytch kits after watching the video on how to fit it to any bike in 5 minutes. You see upside-down axles hardly fitting inside spindly aluminium dropouts. I wonder how many of those guys did face plants after their wheel span out of the drop-outs? I can guarantee that there were at least some. If Swytch took the time to explain all the ins and outs of different forks and the different fitting problems, everybody would be too scared to fit one of their kits.

This is the dropout on mine, it looks similar to other carreras. Have to admit it can be fiddly to place a motor wheel into the dropouts I was about to give up on the yose build thinking I'd need to file but then a final nudge managed to get it to slot in.

 

[saneagle]

This is the dropout on mine, it looks similar to other carreras. Have to admit it can be fiddly to place a motor wheel into the dropouts I was about to give up on the yose build thinking I'd need to file but then a final nudge managed to get it to slot in.

Rear drop-outs are normally 10 mm, so there's a good chance that a motor will go straight in. Q/R front drop-outs are normally narrower than the motor, so need filing wider.

Whatever drop-outs you have, the 12 mm motor axle will cause the axle to sit around 2.5mm off centre. Theoretically, that could cause the need to adjust the derailleur B-screw, or it can cause the disc pads not to line up with the area of the disc. Filing the drop-out deeper solves that. All bikes are different. You don't know what it's going to be like until you try it.

 

[azy77]

That looks a suitable donor bike. If you follow the link in the 1st post that has a 250w rated 48v rear hub cassette wheel with 17 amp kt display/controller ( that's roughly 850 watts peak power from the controller !). Choose correct wheel size 29 in ?
I would pair that with a 48v 20ah battery. E.g. https://www.pswpower.com/products/eu-stock-electric-bicycle-battery-dc-5c-brand-inr21700-48x-21700-cells-pack-48v-192ah-36v-192ah-lithium-ebike-battery-fits-1000w-bafang-tsdz2-tong-196 (check it fits !)

The kt levels correspond to a power level rather than a speed

So
Level 1 = 13% full power
2= 20 %
3= 30%
4= 50%
5= 100%

You will rarely need to go above level 2

Is it me or does that battery on pswpower seem to have it's bolt holes way higher up near the tapered end compared to other batteries?

On the other hand it seems to be way better priced than uk websites, maybe that yose alignment bracket could work with this.

 

[Peter.Bridge]

It's just the standard "Hailong Max" battery cradle. With a 48v 20Ah battery you ideally need 3 attachment points on the down tube. Lots of posts here how to do it search for rivnuts. You sometimes need to lengthen the slots on the battery cradle

 

[azy77]

Rear drop-outs are normally 10 mm, so there's a good chance that a motor will go straight in. Q/R front drop-outs are normally narrower than the motor, so need filing wider.

Whatever drop-outs you have, the 12 mm motor axle will cause the axle to sit around 2.5mm off centre. Theoretically, that could cause the need to adjust the derailleur B-screw, or it can cause the disc pads not to line up with the area of the disc. Filing the drop-out deeper solves that. All bikes are different. You don't know what it's going to be like until you try it.

Would the filing possibly have to cover something like the red marked area?