Enduro needle bearing shock bushing replacement kit

Enduro was showing off their Needle Bearing Insert to replace the DU bushing in Fox shocks, and they’re looking at making them for other brands, too.

Cory Caldwell, an Enduro engineer, says they can improve shock feel so much you end up needing to run the air pressure 10-15 psi higher because they reduce movement drag. Depending on the frame, and how much rotation a shock mount sees, you may only need one. For example, they say in a Niner Jet 9 you’d really only benefit from replacing the top bushing.

They’re $25 per bearing, and they’ll need a special tool to remove the old bushing and put the new stuff in. Well, to do it right anyway…and after Caldwell explained the process, you should just talk your shop into ordering the tool.

Thirty five widths are offered and they have a database of frame measurements, so they can likely get you set up with the right one for your bike.


  1. Bollocks on the special tool. Two sockets and a vice grip do the job in under a minute.

    If one end rotates a lot, it does make a difference.

  2. Steer clear, buy OEM.

    My experience with this product tells that the inner race and roller bearings are not made with an accuracy suited to this role. I remade an inner race for this bearing and it ended up being 0.2mm oversize to take the slop out of the bearing needles. At the saddle of a Giant Trance the initial slop with the bearing out of the packet resulted in a 2mm of clunk clunk movement. Thoroughly unacceptable in terms of linkage bearings. Thoroughly unacceptable in anything! Buy two sets of RP bushes instead for the same price and swap them out regulary. If it was such a good idea Fox would already be doing it.

    • Bringing this back because I found the same issue. On my 2016 5010CC I started with the ‘+’ supplied bushing. I very quickly realized that there was slack and switched to the ‘++’ bushing. There was still slack and now I’m going back to stock style bushings. Nice idea, but it just doesn’t work…As you mentioned, Fox would already be doing so.

  3. I put one of these in my Reign without special tools. Absolutely no slop after 7 days in Moab. I did have to increase shock pressure because it was blowing through travel easier than usual.

  4. Actually, I think the bearing above actually qualifies as a full compliment bearing and not a needle bearing. A needle bearing would have a cage that retains the rollers. Full compliment bearings are better equipped to handle high side loads. This is why they are often found in rear motorcycle suspensions. Splitting hairs I guess, but sometimes it’s okay to geek-out.

What do you think?