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Anyone converted 1" forks to 1 1/8 steering tube ?

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monkeybat:
Found some looka-like forks for my Mongoose DMC but they are 1" thread type and need to be 1 1/8.
Anyone every converted theres to a 1 1/8 steering tube ?
Have some old 1 1/8 forks to use the parts for this and also need to put bosses on them.

ozone:
Buy a headset reducer like this one...

http://www.sourcebmx.com/product/bmx-racing-products/bmx-racing-components/stems-headsets/headset-spacers/sinz-headset-reducer/2103.shtml

Discostu:
This can be done by fitting a small 1"1/8th top headset cup and loose bigger bearings greased up. Most 1"18th headsets such as Fsa pig had a smaller top cup compared to a Bottom one. The outside dimensions of the cup are the same as a 1" but the inside is an 8th of an inch bigger. So that is why bigger bearings are needed. You may be able to find some that fit complete in a race. But to be honest unless you have shed loads of spare headsets your probably better of putting loose bigger bearings from the lower part of a FSa pig in as they are bigger.  Or you can use a headset shim like the sinz ones in the post above.

The only other thing I need to say is "why are you doing this" !!!
You already have a frame that accepts an 1"1/8th headset which is a far better set up than the old threaded 1" version which comes loose. That's why all bikes have moved on in that direction. I can understand riders converting there 1" frame to accept a 1"1/8th forks/headset/stem set up for a bike that's going to be ridden as the steering is super smooth. Without coming loose. Why anyone would want to fit 1" forks into a 1"1/8th frame is beyond me. Having said that I suppose if you had one of those retro quads/rippers you could deceive some people if it had an old type 1" headset and the brake mounts removed. But it wouldn't be as good to ride. However your frame isn't a retro frame. I would just find some nice chrome or painted forks that are 1"1/8th and fit them to it until some correct ones turn up. There must be someone that can help you out with some. To save yourself a lot of bother and effectively making your build worse. I hope this helps. Cheers stu :daumenhoch:

TwoBobRob:
Got to agree with Stu, you're on a hiding to nothing there buddy.

They're not going to be very lookalike up at the stem eh? The steerer tube isn't long enough for a clamp on stem is it?

john4130:
i did this years ago with my standard sta, 1 1/8" frame and gsport 1" forks. my solution was to get a piece of aluminium sheet 0.7mm from work and cut it to the same length of the headtube, roll it so it fits in the headtube with a tigh fit and the ends of the rolled piece butted together, then just use a regular 1" threadless headset for the gsport forks. never had a problem with it for years. i originally bought the headset reducers that fitted the frame but they would not fit a regular 1" headset, i think they may only fit the 1" roadbike or mini bike headsets. worth finding out if you go down that route, or just do what was said and use bigger balls in an 1 1/8" headset.

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