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Thread: Ask the experts

  1. #2676
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    The Park Internal Cable Routing Kit is one of my favorite tools on the bench.


    Sent from my iPhone using TGR Forums

  2. #2677
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    Quote Originally Posted by El Chupacabra View Post
    I have a little bit of play in a SRAM GXP crankset - any suggestions on how to get rid of it? I thought it might be bad bearings, so removed the cranks - and bearings are smooth, no play. Cleaned and regreased splines, reinstalled and torqued, and there's still a little play.

    Threaded GXP BB, and the washers are in place and in the right order. No wavy washer, but IIRC that is only for the press fit GXP BB.

    This is the stock, original crankset and BB on this bike.
    Just add a BB spacer. I ran into that with a Wheels Mfg GXP BB. Called them and the guy was like, ďyea man just do what feels right. Itís not like every BB shell is exactly the width SRAM wants it to be.Ē


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    Lots of Cream, Lots of Sugar

  3. #2678
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    Quote Originally Posted by jm2e View Post
    Just add a BB spacer. I ran into that with a Wheels Mfg GXP BB. Called them and the guy was like, ďyea man just do what feels right. Itís not like every BB shell is exactly the width SRAM wants it to be.Ē


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    BB spacer as in the type that goes between the BB cup and the frame? Or as in one that slides onto the crank spindle?
    Quote Originally Posted by powder11 View Post
    if you have to resort to taking advice from the nitwits on this forum, then you're doomed.

  4. #2679
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    My fat bike is a pig. Easiest way to drop a couple pounds is going tubeless but it came with non-tubeless OEM Maxxis Minions and non-tubeless Sun Rims.

    I can seal up the rims with tape and whatnot but can I get the 4.9 inch non-tubeless tires to seal up? I don't want to waste the sealant trying unless I know I can do it.

    Anyone have success with this type of tubeless fat bike conversion?

  5. #2680
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    Quote Originally Posted by El Chupacabra View Post
    BB spacer as in the type that goes between the BB cup and the frame? Or as in one that slides onto the crank spindle?
    Between BB cup and frame. I suppose you could use the spindle one too. But Iíll bet the frame/cup spacer works better.


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    Lots of Cream, Lots of Sugar

  6. #2681
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    Quote Originally Posted by HankScorpio View Post
    My fat bike is a pig. Easiest way to drop a couple pounds is going tubeless but it came with non-tubeless OEM Maxxis Minions and non-tubeless Sun Rims.

    I can seal up the rims with tape and whatnot but can I get the 4.9 inch non-tubeless tires to seal up? I don't want to waste the sealant trying unless I know I can do it.

    Anyone have success with this type of tubeless fat bike conversion?
    https://m.youtube.com/watch?v=Omj1_-TNovg

    This but i used the pink foam that normally goes between a foundation and stud wall to build up the rim bed. Sent you a PM if you want to talk it through.
    That Don't Make No Sense

  7. #2682
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    Quote Originally Posted by skaredshtles View Post
    Internally routed shit is really irritating. Bike industry:

    Santa Cruz...we made it easy. You're welcome.

  8. #2683
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    Quote Originally Posted by jm2e View Post
    Between BB cup and frame. I suppose you could use the spindle one too. But Iíll bet the frame/cup spacer works better.


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    I'll dig around and see what I've got in the parts bin. Thanks.
    Quote Originally Posted by powder11 View Post
    if you have to resort to taking advice from the nitwits on this forum, then you're doomed.

  9. #2684
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    Quote Originally Posted by Cabinfever View Post
    https://m.youtube.com/watch?v=Omj1_-TNovg

    This but i used the pink foam that normally goes between a foundation and stud wall to build up the rim bed. Sent you a PM if you want to talk it through.
    looks like the old ghetto tubeless setup but with the foam liner is that to give a little more structure to the rim where normaly there is just a rubber membrane ?

    I'm interested but I havent even got the new bike yet,
    Lee Lau - xxx-er is the laziest Asian canuck I know

  10. #2685
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    Quote Originally Posted by joetron View Post
    The Park Internal Cable Routing Kit is one of my favorite tools on the bench.
    I may have to invest. Some companies seem to be doing this a lot better with guide tubes and such, but Commencal just puts a couple holes in the frame and wishes you good luck. Their grommets suck, too. Great bikes otherwise. The Absolut 24 is completely dialed and definitely the best 24" DJ available right now, and it costs a couple hundred less than its competitors.

  11. #2686
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    Quote Originally Posted by jm2e View Post
    Between BB cup and frame. I suppose you could use the spindle one too. But Iíll bet the frame/cup spacer works better.


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    The bb spacers might be too thick for what he's describing. If so, use the spindle spacers.

  12. #2687
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    Quote Originally Posted by Roxtar View Post
    The bb spacers might be too thick for what he's describing. If so, use the spindle spacers.
    Yup. Not a lot of BSA cup spacers out there thinner than 2.5mm.

    Also, thereís likely to be a little trial and error involved and spindle spacers will be much quicker and easier to deal with with.


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  13. #2688
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    Quote Originally Posted by Dantheman View Post
    I may have to invest. Some companies seem to be doing this a lot better with guide tubes and such, but Commencal just puts a couple holes in the frame and wishes you good luck. Their grommets suck, too. Great bikes otherwise. The Absolut 24 is completely dialed and definitely the best 24" DJ available right now, and it costs a couple hundred less than its competitors.
    I think itís worth it. I bought the kit to have at my garage workshop in SLC, but it now lives on top of my bench at the shop.
    Basically removes the headache of fishing housing through any frame that doesnít have TITs (Tubes In Tubes - Does Transition still uses this joke?).


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  14. #2689
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    Quote Originally Posted by joetron View Post
    Yup. Not a lot of BSA cup spacers out there thinner than 2.5mm.

    Also, there’s likely to be a little trial and error involved and spindle spacers will be much quicker and easier to deal with with.


    Sent from my iPhone using TGR Forums
    Well, I'm intrigued now. My money is on a regular old cup spacer fixing the problem. What do you guys think will happen? Right now he tightens it down and there's play. Add 2.5mm, and the play should go away. Am I missing something? Threaded BB cup is literally one of the easiest things to pull on and off a bike.
    Lots of Cream, Lots of Sugar

  15. #2690
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    The fixed length spindle binds the bearings if the crank has less than 2.5 mm worth of play(which is a lot).
    Yeah, itís easy to take cups out, but why remove the cranks and a bb cup when you can just remove the cranks? It probably needs like a .5mm washer on the spindle.


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  16. #2691
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    In an air fork with a self-equalizing negative spring (via "dimple" transfer port on the inside on the stanchion), does that the amount of travel that is run impact the air spring curve in any noticeable way? When swapping an air shaft to change travel, the negative spring volume remains constant, and therefore proportionally larger at lower travels.

    Does running less travel require a higher air pressure to avoid excessive sag caused by the proportionally larger negative spring? And, assuming that forks have a certain design travel, does deviating far from that design travel result in negative ride characteristics?

    This is all a bit theoretical, but I was trying to figure why Rockshox's recommended air pressures for the Lyrik are higher for a given rider weight at 160 mm of travel and below than for 170 mm and above, which is what got me thinking about the relative negative spring volume and resulting required setup.

  17. #2692
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    Quote Originally Posted by jm2e View Post
    Well, I'm intrigued now. My money is on a regular old cup spacer fixing the problem. What do you guys think will happen? Right now he tightens it down and there's play. Add 2.5mm, and the play should go away. Am I missing something? Threaded BB cup is literally one of the easiest things to pull on and off a bike.
    Because 2.5 mm is a lot of space. I'm guessing he doesn't have that big a gap

  18. #2693
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    This crankset just has a little play - a 2.5mm BB spacer will be too big. Haven't dug around in the parts bin yet, but will look today.

    I have a bunch of O rings, and could fit one on the crank spindle as a spacer. Don't know if that would help or hurt though.
    Quote Originally Posted by powder11 View Post
    if you have to resort to taking advice from the nitwits on this forum, then you're doomed.

  19. #2694
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    Quote Originally Posted by El Chupacabra View Post
    This crankset just has a little play - a 2.5mm BB spacer will be too big. Haven't dug around in the parts bin yet, but will look today.

    I have a bunch of O rings, and could fit one on the crank spindle as a spacer. Don't know if that would help or hurt though.
    Visit the Ghost of Christmas Past:
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  20. #2695
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    Quote Originally Posted by El Chupacabra View Post
    This crankset just has a little play - a 2.5mm BB spacer will be too big. Haven't dug around in the parts bin yet, but will look today.

    I have a bunch of O rings, and could fit one on the crank spindle as a spacer. Don't know if that would help or hurt though.
    I used a rubber gasket/O ring as a spacer on my XTR for the last two years, it worked perfectly.
    Forum Cross Pollinator

  21. #2696
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    Quote Originally Posted by El Chupacabra View Post
    This crankset just has a little play - a 2.5mm BB spacer will be too big. Haven't dug around in the parts bin yet, but will look today.

    I have a bunch of O rings, and could fit one on the crank spindle as a spacer. Don't know if that would help or hurt though.
    go to any bike shop. They'll have more little plastic spindle spacers then they know what to do with

  22. #2697
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    Quote Originally Posted by Dee Hubbs View Post
    Heh. Different bike, different crank, different BB.

    But this gave me an idea. Will go check if I have any extra SRAM BBs, in case any came with a thin spacer than didn't get used.
    Quote Originally Posted by powder11 View Post
    if you have to resort to taking advice from the nitwits on this forum, then you're doomed.

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