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Posted

Need some help please

Build a duel suspension 29er bike (new frame / new rear shock)

Give the local engineering guy a go to make me the bushes to fit the shock into the frame.

It does work, but plenty of play on the rear eye bush.

So I guess I need to buy the genuine Fox bush kit – or perhaps an “eye needle bearing kit”

Or some low friction bushing kit – as per google search…

So my question : where in South Africa can I buy the genuine Fox hardware for this shock online

The shock eye to eye is 165mm

Attached a photo of the shock

Thanks for reading

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Posted

In your picture it looks as though you are missing the inside sleeve/bush that should be pressed into the shock.

These are what I have replaced before when I have had play.

Posted (edited)

Regarding the new fighting-suspension bike you're building and the shock bushing.

Lets distinguish between some parts in the shock mounting system,

1) Shock eye - the round eye at the end of each shock. These are not wear parts and wear parts need to be pressed into them. You shock eye is missing a wear part.

2) DU Bushing. This is the wear part that fits directly into the shock eye. As you've measured, the shock eye is 15mm and therefore the DU bushing should have an OD of 15mm (in reality a titsy bit bigger).

3) Reducer bush. Such a bush is a two-part affair as pictured in your first photo.

4) Through the reducer bush goes a mounting bolt. These are available in two sizes and the sizes are frame-dependent; 6mm and 8mm. They are usually special bolts and should ideally be made from stainless steel. In your case it is a smooth-shaft male-female bolt in SS. Make sure that the leading edges are nicely chamfered lest they eat up the Teflon inner coating of the DU bush,

 

 

 

What's missing from your picture is the DU bush. Go to Bearing man and order a 15mm x 1/2 inch x 1/2 inch DU bush. Press it in using a soft-jaw vice.

Inside the DU bush will be your reducer bushes. The ones you have don't look to buggered but measure them at two places on the narrowest section - against the flange and at the end. If the measurements differ, get new ones.

 

If you're having a machinist make you new reducers, make them from 6000-series aluminium. The measurements are as you confirmed, except for the area where I said you should measure. There you should be 1/10th of a mm oversize. It should be a tight press fit inside the DU bush.

 

The hole drilled through the centre is nominally a 6mm or 8mm but in reality, a 6mm or 8mm drill will make a 6.1mm and 8.1mm hole, which causes some irritating play between reducer and mounting bolt. I drill those to 5.9mm and 7.8mm for a better fit.

Supply of reducers is erratic. In theory Omnico (Fox agents) should have these bushes in stock by the dozens, but they don't. Reducers come in various widths and I believe every bike shop should have a little compartmentalized container with a few of each size in stock at all times. The Omnico rep should come around once every two weeks and replenish it. This happens in Nirvana only, hence our frequent problems and self-manufacture.

Edited by Johan Bornman
Posted

I can mail them to you, if that counts as an online order. You have two options - the new style IGUS plastic kit or the older DU bush and aluminium reducers.

 

Mail me on andrew(at)stokesuspension(dot)com with the diameter of the bolt and the spacing between the mounting tabs on each end, or the make and model of the frame, and I can quote you on both options.

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