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  1. #1
    mtber mtbtrek's Avatar
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    Fork upgrade question

    I have a 2006 trek 4900 with rockshox j1(80mm). if i were to uprade the fork how much travel could i get.
    also how do i tell if is a threadless or not
    [SIGPIC][/SIGPIC]

  2. #2
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    if you have 80mm i wouldn't go over 100mm

  3. #3
    Old School Rad mtnbiker66's Avatar
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    Quote Originally Posted by sirtigersalot View Post
    if you have 80mm i wouldn't go over 100mm
    I would...........
    Like a circus monkey on a stolen Harley......

  4. #4
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    you could put a very long travel fork on it but the geometry is gonna get screwy, even a 100mm will change it but it won't be drastically diff, but w/e throw somthin long on there if u want

  5. #5
    Type 1 Racer rydaddy's Avatar
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    I haven't looked up the specs but I am sure it's threadless. Does your stem have 3 bolts, 2 side and 1 on top? That would be threadless.

  6. #6
    mtber mtbtrek's Avatar
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    yay my stem has 2 bolts on the side and 1 on the top
    [SIGPIC][/SIGPIC]

  7. #7
    Primate Metzinger's Avatar
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    Yay indeed.
    But make sure that new fork improves over the old in a meaningful way.
    More travel does not mean better fork.
    I'd rather have a predictable 10mm fork than a 100mm leaky piece of twisty junk.
    Check the reviews.

  8. #8
    ****** (can I say this?)
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    Dont get a dart. One of my spare rotors has been ruined by leaking oil from my old dart
    “Speed has never killed anyone, suddenly becoming stationary... that’s what gets you.”- Jeremy Clarkson

  9. #9
    ed
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    Quote Originally Posted by ca7erham View Post
    Dont get a dart. One of my spare rotors has been ruined by leaking oil from my old dart
    Oily rotor + alcohol = good rotor.

  10. #10
    ****** (can I say this?)
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    Hmm, well then, I guess you should get a dart. I never read the end of that thread.
    “Speed has never killed anyone, suddenly becoming stationary... that’s what gets you.”- Jeremy Clarkson

  11. #11
    mtber mtbtrek's Avatar
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    how about the rockshox recon 351 Coil
    [SIGPIC][/SIGPIC]

  12. #12
    ed
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    Recon = good

  13. #13
    mtber mtbtrek's Avatar
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    will the recon fit on my bike
    [SIGPIC][/SIGPIC]

  14. #14
    ed
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    Yes

  15. #15
    Senior Member z415's Avatar
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    Are you going to DIY? I recommend getting a shop to do it - it has a few steps.
    Falling is learning...[SIGPIC][/SIGPIC]...learn to not fall in a box.
    Any good American will watch THIS -and- WHERE WAS MY BIKE MADE?

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    mtber mtbtrek's Avatar
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    what are the steps on replacing it
    [SIGPIC][/SIGPIC]

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    I would throw on a tora solo air or a reba. Both are good forks for the price and tunable. You can run 100mm travel without too much issue but there isn't a point to put more unless you're doing riding other than xc, in which case I would consider getting a different bike.

    As far as installation, check out park tool's mechanics corner.
    http://www.parktool.com/repair/readhowto.asp?id=111

  18. #18
    Senior Member Jameson's Avatar
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    The steps are as follows. Remove bolts from stem. Remove topcap from headset. Pull out fork. Remove brake attatchment. Install headset race on new fork. Cut fork to proper length. Install new starnut into fork. Slide fork into headtube after installing bearings from headset. Tighten topcap and stem bolts. Attatch brake.
    These steps are not exactly in order. Installing the race on the fork requires a specialty tool but I've done it twice using various methods. Same with the star nut. You risk damaging the race and setting the star nut wrong with the shadetree method. If your not confident, take it to a shop. They can also recommend a suitable fork.

  19. #19
    ed
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    Quote Originally Posted by Jameson View Post
    The steps are as follows. Remove bolts from stem. Remove topcap from headset. Pull out fork. Remove brake attatchment. Install headset race on new fork. Cut fork to proper length. Install new starnut into fork. Slide fork into headtube after installing bearings from headset. Tighten topcap and stem bolts. Attatch brake.
    These steps are not exactly in order. Installing the race on the fork requires a specialty tool but I've done it twice using various methods. Same with the star nut. You risk damaging the race and setting the star nut wrong with the shadetree method. If your not confident, take it to a shop. They can also recommend a suitable fork.
    Well, I followed your instructions...but after you cut the fork to proper length, how do you get the front wheel to stay on?

  20. #20
    In search of moar cowbell dminor's Avatar
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    Quote Originally Posted by chelboed View Post
    Well, I followed your instructions...but after you cut the fork to proper length, how do you get the front wheel to stay on?
    Silly person . . . you're supposed to cut the stanchions, not the sliders .

  21. #21
    Senior Member Jameson's Avatar
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    Quote Originally Posted by chelboed View Post
    Well, I followed your instructions...but after you cut the fork to proper length, how do you get the front wheel to stay on?

    Really? You're going to pick that? As if anyone would actually cut both legs?
    Very weak. Not your best effort I'm afraid, but I'll concede stranger things may have happened. You'd have to be all sorts of dumb though. Just thick headed as heck. The mind boggles imagining such an individual.
    For the record, cut the steer tube.

  22. #22
    Senior Member z415's Avatar
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    You can always cut the bottom of the drop outs to be more shallow to shed some weight...
    Falling is learning...[SIGPIC][/SIGPIC]...learn to not fall in a box.
    Any good American will watch THIS -and- WHERE WAS MY BIKE MADE?

  23. #23
    ed
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    Quote Originally Posted by Jameson View Post
    Really?
    Really what?

    Quote Originally Posted by Jameson View Post
    You're going to pick that?
    I'm gonna pick what?

    Quote Originally Posted by Jameson View Post
    As if anyone would actually cut both legs?
    Hence the spirit of the neener in the air.

    Quote Originally Posted by Jameson View Post
    Very weak.
    At least I got a nibble.

    Quote Originally Posted by Jameson View Post
    Not your best effort I'm afraid, but I'll concede stranger things may have happened.
    I always give 110% to my wonderful BF.net compadre's.

    Quote Originally Posted by Jameson View Post
    You'd have to be all sorts of dumb though.
    Didn't you know?

    Quote Originally Posted by Jameson View Post
    Just thick headed as heck.
    You obviously haven't spoken with my beloved wife.

    Quote Originally Posted by Jameson View Post
    The mind boggles imagining such an individual.
    Just give me a minute...I will astound you.

    Quote Originally Posted by Jameson View Post
    For the record, cut the steer tube.
    Went w/o saying...so why waste all this good sarcasm?

  24. #24
    Senior Member z415's Avatar
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    ^ Wow.
    Falling is learning...[SIGPIC][/SIGPIC]...learn to not fall in a box.
    Any good American will watch THIS -and- WHERE WAS MY BIKE MADE?

  25. #25
    use your best eye kenhill3's Avatar
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    Jameson-

    Hey, follow Ed's lead! Yer not havin' nearly as much fun as he is!
    "I tell you, We are here on earth to fart around, and don't let anybody tell you any different." - Kurt Vonnegut jr.

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