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  1. #1
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    RockShox XC28 spring upgrade

    I have the Guardian with the stock XC28 80mm fork. I came across a RockShox manual that recommends for my weight (195-200lbs) I should be running a firm spring as opposed to the factory medium spring.

    http://cdn.sram.com/cdn/farfuture/w-...4149_rev_c.pdf

    I found the spring kit at several outlets for about $23, not too bad.

    Here are my questions:

    1. Is the spring swap worth doing?

    2. How difficult is this spring swap? Has anyone here had one of these apart?

    3. Most of the firm springs I have found are 100mm. Will a 100mm spring work in my fork?

    The fork is not doing a bad job for my type of riding. Mostly single track with lots of roots and an occasional short drop. I have the preload maxed out. If I can improve the performance for 23 bucks I'm all for it. What do you guys think?

  2. #2
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    I bought firm red spring(80mm for my Guardian) but haven't got it yet.
    Once I get it I will let you know.
    Anyway Im 205 lbs.(225 was in April) I feel stock xc28 is little light. so $23 for firm spring..why not?

  3. #3
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    Quote Originally Posted by mark729 View Post
    I bought firm red spring(80mm for my Guardian) but haven't got it yet.
    Once I get it I will let you know.
    Anyway Im 205 lbs.(225 was in April) I feel stock xc28 is little light. so $23 for firm spring..why not?
    Where did you buy this? I'm having trouble finding it. I'm having a similar issue but I'm at 220lbs.

  4. #4
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    Quote Originally Posted by hrbib21 View Post
    Where did you buy this? I'm having trouble finding it. I'm having a similar issue but I'm at 220lbs.
    RockShox XC28 Spring Internals Left 29 80 Firm Red - AEBike.com

  5. #5
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    Quote Originally Posted by mark729 View Post
    I bought firm red spring(80mm for my Guardian) but haven't got it yet.
    Once I get it I will let you know.
    Anyway Im 205 lbs.(225 was in April) I feel stock xc28 is little light. so $23 for firm spring..why not?
    I think it could be well worth the money. The part that concerns mi is tearing down the shock. I have never had one of these apart. Part of my brain is saying leave well enough alone. I am really eager to see how your tear down and reassembly goes. Best of luck!

  6. #6
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    Quote Originally Posted by TheDocTx View Post
    E

    I think it could be well worth the money. The part that concerns mi is tearing down the shock. I have never had one of these apart. Part of my brain is saying leave well enough alone. I am really eager to see how your tear down and reassembly goes. Best of luck!
    https://www.youtube.com/watch?v=aa-b...e_gdata_player

    Well..it does not look hard.

  7. #7
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    That's as easy as it gets.

  8. #8
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    I took apart my xc28 last summer. The spring comes right out. It's way easier than servicing an air fork.
    Nathan

  9. #9
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    Quote Originally Posted by mark729 View Post
    Wow, yeah. Not much to it. Time to order parts!

  10. #10
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    RockShox XC28 spring upgrade

    Does anybody have a link for RockShox XC28 Spring Internals Left 29 80 X-Firm Blue? I'm only finding RockShox XC28 Spring Internals Left 29 80 Firm Red.

  11. #11
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    Quote Originally Posted by KrazyKreitzer View Post
    Does anybody have a link for RockShox XC28 Spring Internals Left 29 80 X-Firm Blue? I'm only finding RockShox XC28 Spring Internals Left 29 80 Firm Red.
    I dont think you can find it.
    I've searched almost week but no luck..

  12. #12
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    I got UPS today. Firm Spring~!

    RockShox XC28 spring upgrade-20130620_184828_zps0d5211fa.jpg
    First unscrew top knob which has preload adjustment.
    after take it out, push down handle bar and take out top spring part.

    and take bottom nut(A) with allen wrench.
    RockShox XC28 spring upgrade-20130620_201752_zpsec27fac3.jpg
    RockShox XC28 spring upgrade-20130620_202334_zpsd76aeac4.jpg

    Bottom part(B) won't come out unless you hammer it(C) out.
    RockShox XC28 spring upgrade-20130620_202306_zpsdbedc851.jpg

    Put some grease on new bottom part and put it back to the shock.
    Put some grease on new top spring part and put it back to the shock.
    It will push down bottom part so you can screw the bottom nut which is A in picture
    and tight the preload adjustment knob.
    that's it.
    It would take 20minutes.

    and for someone like me.
    Here is the picture shows how preload work.
    RockShox XC28 spring upgrade-20130620_202847_zps041ad0a6.jpg

  13. #13
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    Dude, awesome write up. Thanks, I'm ordering the replacement right now.

  14. #14
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    Same here, nice write up! Had to throw some rep your way for that!

  15. #15
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    Quote Originally Posted by TheDocTx View Post
    Same here, nice write up! Had to throw some rep your way for that!
    Yep... I just gave rep to everyone here that I could. Looks like the rest of you I have given rep to before and it won't let me give you more till I give out more to others.

  16. #16
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    I'm not a bike mechanic or an expert at working on forks, but I'm betting you can damage your bike by hammering on the fork while it's still attached to the bike. Especially while it's laying upside down on the garage floor. I would take the fork off the bike and work on it independently.
    Nathan

  17. #17
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    Quote Originally Posted by Barheet View Post
    I'm not a bike mechanic or an expert at working on forks, but I'm betting you can damage your bike by hammering on the fork while it's still attached to the bike. Especially while it's laying upside down on the garage floor. I would take the fork off the bike and work on it independently.
    Well...totally understand what your saying but once you see what I mean, it does not need real hammering, it just need lightly hammering to take out bottom spring part.

  18. #18
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    Was it worth it?

  19. #19
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    Yes. Absolutely.

    Side note, there was hardly any grease on the stock spring. No wonder it made so much noise.

  20. #20
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    Quote Originally Posted by hrbib21 View Post
    Yes. Absolutely.

    Side note, there was hardly any grease on the stock spring. No wonder it made so much noise.
    I need to get off of my lazy rump and do this. Between family, work, and riding there is not much time left! I was thinking about this while riding this morning when I bottomed out the forks about 10 times.

  21. #21
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    Anyone know if it is possible to increase the travel to 100mm?

  22. #22
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    I would like to know that as well. I think I saw a forum post about adding spacer(s) to make 100mm.

    I'll be ordering mine as well, I think.

  23. #23
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    I was looking at the parts diagram for this shock and the only parts that are specified as being different between 80/100mm are the parts included in the spring kit. I may very well may be missing something here, but it looks like installing the 100mm spring kit may yield a 100mm fork. Admittedly I found it difficult to decipher the parts diagram/list, so I could be completely off base with this. I need to get off of my bum and just give it a shot.

    Here is a link to the parts diagram I was referring to:

    http://cdn.sram.com/cdn/farfuture/QX..._spc_rev_c.pdf

    The diagram and parts list are on pages 9 and 10. Take a look and see what you think.

  24. #24
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    I think you might be right! Tougher spring and more travel= good to me! 100mm Spring Spacer Kit..

  25. #25
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    So, would it be safe to assume that if you were to get the 80mm spring kit for an XC28 that was originally 100mm, it would reduce the travel (and, more importantly, the A2C distance?)

    This is for an older bike, so I'd like to keep the A2C around 450, and the XC28 is 471, probably do-able, but under 450 would be better (running a Surly Instigator fork at 445 and its perfect right now)

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