Rock shock steering stem swap

[Oldskool26er]

Hi guys....I'm sure I'm not the only one wanting to swap/change a 1-1/8" steering stem to a 1" stem. I know there are guys that do that and some forks have removable crowns. I have a set of carbon FSX rock shock forkd that I want to swap steering stems with. I have access to a 1" removable crown/stem assembly off a mag 21. I don't know for sure but I am assuming stanchion diameter is the same on both so would that be an option?....you guys are great and I love being associated with a group that indulges in the vintage 26 inch mtb's that were part of our early days of mountain biking

 

[ishaw]

As far as I know, mag 21 CSU will not fit, neither will quadra, indy etc. If you have a CSU with the bolt on crown, then it's a case of looking for the one you need. Or, you could get someone to press out the existing one and replace with a new one machined to fit the hole left in the crown, but with the 1 inch diameter steerer you need. I had this done once, the steerer was machined out of aluminium and was also made with a captive threaded top to avoid the need for a star nut. The challenge is finding someone who can do this for you.

 

[pw_pw_la]

I have a similar issue, but I need to replace the steerer on my FSX for a longer version.

Problem is, my model doesn't have the bolted clamps on the crown. So I have to find someone who can remove the pressed stanchions and switch out the crown for another I have with a longer steerer...

But as you say, it's finding someone who can do that for me!

 

[Magpiegifts]

Unfortunately the Mag series of forks have smaller diameter stanchions compared to the later Rock Shox forks like Judy etc.

 

[Oldskool26er]

Unfortunately the Mag series of forks have smaller diameter stanchions compared to the later Rock Shox forks like Judy etc.

Bummer....thanks for the heads up

 

[Oldskool26er]

As far as I know, mag 21 CSU will not fit, neither will quadra, indy etc. If you have a CSU with the bolt on crown, then it's a case of looking for the one you need. Or, you could get someone to press out the existing one and replace with a new one machined to fit the hole left in the crown, but with the 1 inch diameter steerer you need. I had this done once, the steerer was machined out of aluminium and was also made with a captive threaded top to avoid the need for a star nut. The challenge is finding someone who can do this for you.

Thanks for the heads up...what's CSU stand for...crown stanchion unit?

 

[Oldskool26er]

Since the Mag21 is a part of this thread how good of unit is it?

 

[Magpiegifts]

Crown steerer unit.

In their day they were very good. Compared to the Judy series not as good. The Judy fsx being a great looking fork that's very light and tidy. Wish I didn't sell my one
It all depends what you intend on using it for really. Riding or just to complete a retro build

 

[FluffyChicken]

Which FSX is this?

If it is a MAG series based one then yes it will fit.
If it is the Judy series based one then no it will not fit.

 

[Oldskool26er]

Judy series....thanks for the reply