Another Proflex Elastomer/Elastometer fix

David E posted a comment about another fix he’d found for a replacement on his Proflex Elastomer, in the comments section of my other post on fixing your Proflex elastomer shock. He said he’d used the rubber portion of a 1 1/2″ pipe plug in the plumbing section of his hardware store. I asked him for some pictures to share with everyone, and he complied with some excellent photos. Thanks David!

I found a fantastic fix for my Proflex rear shock. Go to your local Ace Hardware or plumbing store and ask for 1 1/2 inch test plugs, or they might call them pipe plugs. Take the wing-nut off, remove the bolt, then take the washers off from both sides. You should be left with a chunk of rubber that has a center hole that’s almost exactly the same diameter as the elastomer was. I used a little soapy water and mine slid right on the shaft the elastomers were on. 3 of these did the trick for me and it’s holding up just fine.

Here is what it looks like in the store, and the final product (click for bigger):

In other news, it looks like a bike shop in New Hampshire has used my inner tube fix on a customer’s bike. I’m glad I was able to help!

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7 Responses to Another Proflex Elastomer/Elastometer fix

  1. mud says:

    I dont understand… there are 2 things going on in ANY working shock absorbers..
    1. a spring to absorb bumps and 2. some damping to control the springs return..
    It seams your solutions skip the damping part.. thus turning your Proflexes into pogo sticks..
    mcu,s or elastomers have a controled rate of re expansion after compession..
    For my Proflex I found a big fat comfort saddle with elastomer suspension on the back.. was a bit soft but I’m not that heavy so it does until i find better. Keep looking everyone I am sure somewhere some one is using mcu’s for another purpose that we can adapt.

  2. Jim C says:

    The damping is in effect solved by the stiction of the spring medium on the damper rod. It would be pap on the end of a 6″ 2011 bike but remember that is is solution to fixing a pretty basic 15yo short travel suspension design.

  3. Pingback: Proflex elastomer | Alleverythingr

  4. JB says:

    Thanks so much! I have a hand-me-down Proflex (1995?) and the rear shock recently went to goo. I took it in for a tune-up with this print-out and the bike mechanic was able to replicate the above, and it worked great! It’s just my commuter bike, it doesn’t have to be the perfect shock-absorbing mountain bike….

    I found replacement kits on, but they were expensive and it wasn’t clear if those were actually new elastomer or not. And living at altitude with intense sun, I didn’t know how long they would last anyway. This was a fantastic alternative!

  5. Tim M says:


    This seems great. You can also get something like the real thing here:
    Really easy and most like the original $53 (worth it for an authentic fix):
    Other years and models:

    Haven’t tried these yet.

  6. Messias says:

    Holly, I know, it’s crazy! All of a sudden I just pppoed out. I’m kind of nervous to go to the doctor today to see how much weight I have gained. Our scale broke around the time I found out I was expecting, so I have no idea how much I weigh.

  7. Antony says:

    Hey there, I’m doing this tomorrow and I see no problems that may occur, only thing is do you think this would work fir the front girvin fork too, running a vector 2 on mine. Only picked the bike up yesterday and in fixing it up for somene old skool riding this summer, getting board of the Orange five a bit :S

    Also sorry to post here I see this was written a while ago.

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