Tuesday, 10 June 2025

Straightening a bike's forks

Here's the Elswick Hopper I got last week. Lovely bike, but the front forks had been pushed back by a collision at some point, so, though it's rideable, it bothered me, and I wanted that extra stability you get when there's lots of rake on the front forks; an old Omafiets I once had would ride perfectly happily no-hands..

 


I had to remove the front wheel and mudguard, and chainguard, and the rear brake rod assembly. 

Then I cut a 38mm hole in a lump of wood, this size approximating to the 1½" tubing of the bottom bracket.


 

....and then I cut the piece of wood in half, so I had two semicircular openings

 

....and cleaned them up with a half-round rasp, so that they fitted snugly on the bottom bracket. I held them loosely in place with some bungee, then secured a piece of timber to the front forks with a couple of screws, like this



...and used a car scissor jack to push the forks forward, taking them a little way past the point where they aligned with the headset, because they sprang back a little when the jack was released.



And there they are, nicely aligned! I had to tighten up the headset bearings a bit, because they'd slackened a little as the bearing cups came back into alignment. 

3 comments:

  1. Well done..a nice bike..just watch the down tube behind the head tube. With the forks being pushed back in a collision, you can see that it has been bent and there will be a weakness there.

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  2. I’ll be riding with caution for a while! But I’m not going to be breaking any records on this beast on the towpath… there’s a bit of crinkling on the downtube paint, but the tube seems pretty straight to me!

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    Replies
    1. Good to hear that on all counts! But it is a nice bike, worth the tlc

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