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Are Fork Foam Rings Brand Specific?

July 23, 2023, 7:52 p.m.
Posts: 111
Joined: Feb. 13, 2018

Servicing my Ohlins RXF 38m2 I noticed my foam rings are toast. I’m wondering if the foam rings for any 38mm fork will be compatible (Zeb, Fox 38 etc)? Or do I need to find the Ohlins ones? The wiper seals are fine. I assume I can put the foam rings from the Fox 38 or Zeb in there instead but appreciate if anyone can confirm compatibility before I do that, just in case the rings from other brands are a different diameter, density, who knows.

Thanks in advance.

July 23, 2023, 8:22 p.m.
Posts: 2046
Joined: Nov. 8, 2003

Hopefully somebody has actual experience, but...

Do they look the same? I used all kinds of random looks-close-enough-to-me foam rings in my Lyrik without any problems whatsoever.

July 23, 2023, 9:35 p.m.
Posts: 111
Joined: Feb. 13, 2018

Unfortunately I can’t check because I’m all out. I’ll try Suspensionwerx or S4 tomorrow.

July 23, 2023, 10:31 p.m.
Posts: 1531
Joined: Sept. 30, 2006

Depending on how toasted your current foam rings are, they can often be cleaned and re-used. Soak them in some isopropyl alcohol and squeeze them out between a couple of shop towels. Repeat until they look like new. If they are ripped or so mangled they can't be re-used then then you'll need those new ones.

July 28, 2023, 7:57 a.m.
Posts: 864
Joined: June 29, 2006

One time a friend bought a 100 foam rings on aliexpress for a couple bucks. He raved how they were so much cheaper. Turned out they didn‘t hold any liquid. Maybe the material they were made of would have been perfect for tire inserts in that regard.

Apart from that I used Fox 36 foam rings in 35mm Lyriks. Worked. Other way around as well. Installation can be tricky, if they are too loose and get caught in the bushings and rip. But you‘d feel that for sure. I did and had fun to fish all the bits out of oily lowers…

 Last edited by: Znarf on July 28, 2023, 7:58 a.m., edited 1 time in total.
July 28, 2023, 8:44 a.m.
Posts: 533
Joined: Feb. 16, 2013

Yeah, either reuse the old ones (I do that often) or stop by the suspension shop. SW should have them in all sizes.

Aug. 10, 2023, 10:30 a.m.
Posts: 16
Joined: Jan. 8, 2018

During COVID, I couldn't find Rockshox 38mm foam rings, so I used FOX 38 foam rings in my ZEB without any issues. Now that parts are available again, I'm back to using Rockshox foam rings, but they appear identical to the the FOX ones. Not sure about Ohlins though?????

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