Rear torque arms for Carrera and Pendleton

Cadence

Pedelecer
Feb 23, 2023
190
151
Having bought a cheap Pendleton Brooke to convert for my wife, I discovered that the rear aluminium dropouts looked a bit shallow to fit a rear hub motor - particularly on the forward edge. I had resigned myself to fitting a front motor until I discovered these on ebay:-

Carrera Ebike Torque Arm Washer Set Universal Fit Rear Motor M12 M14 M16 Axle | eBay

I'd seen posts elsewhere on the forum where others had concerns about the dropouts on various Carrera bikes and looking at the photo's I thought these might also fit the Pendleton:-

WP_20230903_14_47_15_Pro_LI.jpg

This is just a trial fit without having a motor to try (bike upside down), but it looks good enough to consider a rear hub motor now. I might need to file the dropouts slightly, but not much.
This looks a rather elegant solution to me and I can't see them mentioned elsewhere. It does rely on the M5 screw in the mudguard mount staying tight, but it should be OK for a relatively low powered motor (250/350W). I'll be using Loctite or a spring washer.
The vendor was very helpful, sending me some photos and dimensions before I ordered. Advertised as for Carrera models, these might also fit other Halfords brands (Boardman?).
 
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saneagle

Esteemed Pedelecer
Oct 10, 2010
4,709
2,293
Telford
There are two axle sizes. 12mm x 10mm fit most of the motors we use on this forum. 14mm x 10mm fit the larger direct drive motors. Make sure that you get the correct ones for whatever motor you use.
 

Cadence

Pedelecer
Feb 23, 2023
190
151
Having finally decided on a Yosepower rear hub kit, I was able to see how the torque arms fitted:-
WP_20230925_13_25_20_Pro_LI.jpg

WP_20230925_13_26_04_Pro_LI.jpg
I think these are a rather neat design, and I didn't need to file the dropouts. Purely for personal preference I've swapped the supplied stainless hex screws for stainless domed socket screws (actually spare bottle cage screws).

The Pendleton Brooke was a steal at £35.00 and has made a good bike for my wife. "Step over" rather than step through, there was just enough space in the frame for a Hailong 36v. 13Ah battery:-
WP_20230925_13_31_23_Pro_LI.jpg
Items I've added are mudguards (already "in stock"), rear rack, North Road-style handlebars, long adjustable stem, kickstand and new cartridge-type brake pads. The handlebars and stem mean that I can adjust it for me to ride if she doesn't take to it. ;)
 

AGS

Esteemed Pedelecer
Feb 12, 2023
553
171
Your wife should be pleased with that. It’s a lovely bike.