Spreading a front fork

[John Galvin]

My ebike kit is on the way and I'm going to be fitting a front hub motor to a Tern Link P9, which has
already been fitted with a steel front fork.

I'll be using a threaded bar and two bolts to spread the fork by around 10mm to make the motor fit. Do I need
to worry about the two legs of the fork spreading at different rates or can I assume that each leg will spread
by the same amount?
Is there anything I need to do to guard against this happening?

Thanks

 

[trex]

it won't take more than 5 minutes and there shouldn't surprises with a steel fork.

 

[Deleted member 4366]

If one side goes more than the other, whack it with a mallet until it's central. Steel forks bend very easily. Threaded bar is overkill. You'll probably be able to do it with your bare hands.

 

[John Galvin]

Thanks. I'll be grand so.

 

[muckymits]

While on the subject of fork spreading would like every ones opinion on spreading a rear fork (ally) 25/30 mm?

 

[Deleted member 4366]

It should be possible as long as there's not too much bracing. I stretched a Rocky Mountain rear sub-frame close to that. I tested a scrap alloy frame a while ago. I just put my foot on one side and gave the other a good heave an it set about 25mm wider at the first attempt.