Advice please

[flecc]

eZee fit them as standard on their more powerful models. Here's one of their neat front arms pressed into service
as a rear anti-torque arm:

 

[cogs]

I'm very pleased to see people taking torque arms seriously, and the newly designed one from Wisper appears excellent.

When my front wheel hub turned out of my forks I was cycling uphill quite slowly - in all probability throwing my weight towards the rear of the bike and slightly lifting the front. I was still thrown over the bars. Fortunately the helmet was on, and little injury resulted, but it could have been far worse.

My feeling is that a properly designed and fitted torque arm would have prevented my spill. Basically, its a safety issue.

 

[Deleted member 4366]

If you have a 250w motor (750w peak), as long as you install the tab-washers correctly and tighten the nuts up to the correct torque, there should be no need for torque arms. The Americans with bikes rated at 1000w or more do need them. I'm not sure about whether you need them for a 350w BPM motor. I don't have any on mine, but I have steel forks. Naturally, if for whatever reason, your dropouts are already worn, then you'll need them, but otherwise there's no reason to panic - just make sure that the tab washers are properly located and the nuts are tight.