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  1. #1
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    SB66c Stop Bolt Bumper - Replacement ideas?

    Hello,

    We had "lots" of rain lately in the bay area and I took this as an opportunity to service my SB66c.
    I removed the eccentric pivot/bearings and noticed that the bumper was not on the stop bolt anymore. The bumper is in a very bad shape. I donít know how long itís been like this, maybe did it fall when I took everything apart.

    SB66c Stop Bolt Bumper - Replacement ideas?-sb66c-stop-bolt-bumper.jpg

    I reached out to Yeti for a replacement and got sent to my LBS (Sports Basement in Sunnyvale) as they don't have it for direct sale. I ordered replacement bolts and bumpers 10 days ago, and today was said that Yeti does not have the bumpers in stock! I contacted Trailhead and Passion Trail and they donít have the bumpers in stock either.

    Here are the part numbers:
    300030234 - Bolt stop m12x1.25x10mm
    300030235 - Bumper stop

    So I donít know what to doÖ Are there any SB66 owners who found a replacement solution? Someone used a rubber cork (SB-66: Worn-out stop bolt - Page 3) but I donít know if that thing worked out or not.

    Do you guys have any suggestion or know of a place where I could rapidly get that piece of rubber?

    Thanks!

    Hoki

  2. #2
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    There's a bunch of kerfluffle about the bumper, and I wonder what the purpose *really* is when with the bike fully assembled the *shock* is limiting the rotation of the Switch.

    When assembling things, sure, I get it, but once assembled does it really matter?

    I just rebuild the pivots on my sb95 (new bearings and bushings) and my bumper "hat" is MIA also, but I refuse to sweat it as I don't think it can be touched. I need to de-pressure the shock though and check max-compression to be sure though.

  3. #3
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    Go to your local auto parts store and ask to see their selection of vacuum port plugs.

  4. #4
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    I have used a slightly trimmed Schrader valve cap with huge success.

  5. #5
    bog
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    This issue shouldn't happen at all but it is even worse that Yeti won't stock such a small item. They obviously have them somewhere because they continue to build frames. What's next, no replacement bearings!? Very poor customer support.

    I had an aluminum SB66 which cracked apart on my (rear triangle) and the stop was hammered by the Switch link. Yeti replaced the front and rear triangles under warranty and I sold the frame. I still love the fit and the ride and would love a SB-66C but these issues worry me because I had to wait 3 months for the replacement bearings after my first frame had the bad bearings.
    SC Tallboy C : Giant TCX SLR : Giant Propel Adv SL DA9070

  6. #6
    undercover brother
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    I had 3 frame warrantied because of this issue. I would wear through the bumper in one ride. I absolutely love the ride and feel of the 66, but after my last warranty frame, I sold it and am waiting on a banshee spitfire. Without a doubt one of the best pedalling 6" bikes out there, but I was plagued with issues and I can stand a little less efficiency and a little more reliability. Yeti was superb to deal with though, and I can't say enough good things about their CS.

  7. #7
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    I talked to Matt from Yeti and he said that I could:

    1 - ride without the bumper.
    2 - put some super glue inside the bumper to hold it on the stop bolt.

    #1 does not work for me as I don't want to damage the eccentric. I know that some are unsure if the bumper is really useful, but I don't want to buy a new eccentric at $140 a pop. BTW, the easiest and fastest way to get a new bumper would be to order a new eccentric kit...

    I was not sure about #2 as the bumper is in a very bad shape. So I went to OSH and bought one of those rubber corks. I worked on it with a Dremel, added some Gorilla glue inside and voilŗ:

    SB66c Stop Bolt Bumper - Replacement ideas?-sb66c-homemade-stop-bolt-bumper.jpg

    It looks almost like a brand new bumper! I'm still putting my SB66c back together so I cannot tell if that really works. Hopefully it will hold up until I get the genuine bumpers I ordered from Yetifan!

  8. #8
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    O'reilleys sells different size rubber caps List: Search for 'vacuum caps' | O'Reilly Auto Parts

  9. #9
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    bringing back this topic... it's quite a shame this issue for a few reasons

    1 - yeti knows about it, doesn't deny the issue but at the same time doesn't come up with a reliable solution
    2 - the suggestion to ride without the bumper brings the question why it's even there in the first place if you don't need it? and if you don't need it why it's all trashed when it's supposedly not being used?
    3 - yeti keeps saying this is a wear part and needs replacement, but I haven't seen it mentioned in the schedule maintenance they have in the manual

    I'd expect no less than parts available for replacement, as well as a better, reliable solution so you don't have to take the bike apart every other ride to replace this rubber bumper stop.

    This makes me wonder if I should just return my brand new sb66c and get something different!

    Definitely a design flaw in terms of material that yeti needs to find a solution for! I find it very hard to accept that yeti keeps asking people to replace it or replacing frames instead of coming up with a better material that will last for at least a season of usual riding for a 6" travel bike!

  10. #10
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    For what it's worth...A Schrader valve cap has been the best solution to date for my SB66C. I make it a point to take apart the eccentric for inspection and cleaning quarterly, which I fully expect to change out the bumper condom at that time. Takes me 30 minutes from start to finish.




    Quote Originally Posted by mfa81 View Post
    bringing back this topic... it's quite a shame this issue for a few reasons

    1 - yeti knows about it, doesn't deny the issue but at the same time doesn't come up with a reliable solution
    2 - the suggestion to ride without the bumper brings the question why it's even there in the first place if you don't need it? and if you don't need it why it's all trashed when it's supposedly not being used?
    3 - yeti keeps saying this is a wear part and needs replacement, but I haven't seen it mentioned in the schedule maintenance they have in the manual

    I'd expect no less than parts available for replacement, as well as a better, reliable solution so you don't have to take the bike apart every other ride to replace this rubber bumper stop.

    This makes me wonder if I should just return my brand new sb66c and get something different!

    Definitely a design flaw in terms of material that yeti needs to find a solution for! I find it very hard to accept that yeti keeps asking people to replace it or replacing frames instead of coming up with a better material that will last for at least a season of usual riding for a 6" travel bike!

  11. #11
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    Quote Originally Posted by mfa81 View Post
    2 - the suggestion to ride without the bumper brings the question why it's even there in the first place if you don't need it? and if you don't need it why it's all trashed when it's supposedly not being used?
    I think of it as an assembly/disassembly element, guarantees the switch is properly oriented during frame assembly.

    I have the belief that you could safely run the bike w/o the stop bolt at all once assembled.

    But it's just that, a belief.

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