Warrantee voidance for fun and profit!- Mtbr.com
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  1. #1
    Te mortuo heres tibi sim?
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    Warrantee voidance for fun and profit!

    So you have a rigid fork on the SS that may be a bit too stiff and unforgiving? Got another one that may be a bit shorter than your tastes? Unwilling to shell out for a high $$$$ custom fork, esp. after having a bike with one stolen, and bending another, and having the maker not seem to want to honor their crash replacement policy? Really like the way kona P2 (or other shorter) forks feel and track?

    Kids, this is for you!
    <img src="http://gallery.consumerreview.com/webcrossing/images/Picture006(19).jpg">
    So I love the KM fork I've been using, but it's still a bit too tall, and very unforgiving, even with a fat tire. Ah! Enter the Kona P2 disc only fork, direct from www.konaworld.com!
    But! it's a bit too short.
    <img src="http://gallery.consumerreview.com/webcrossing/images/Picture017(5).jpg">
    Take two 10mm aluminum threadless headset spacers (yeah, I know-this is a 5mm in the pic-used the only two 10mm ones for the project)
    <img src="http://gallery.consumerreview.com/webcrossing/images/Picture020(8).jpg">
    Take your handy Dremel tool, and cut through one of them on one side. Sand or buff all the edges smooth.
    <img src="http://gallery.consumerreview.com/webcrossing/images/Picture018(5).jpg">
    Cut apart an aluminum (aluminium for those of you across the pond and make a shim. I needed one and a half circular pieces from the can.


    The split one of the spacers goes where your crown race would normally go on the fork crown. Cram it on there; it'll be a tight fit.
    <img src="http://gallery.consumerreview.com/webcrossing/images/Picture019(6).jpg">
    I used some of this liberally applied underneath it. (Blue Loctite or somesuch.)

    Then the other spacers sits nicely atop this, with a small amount of your shim material and more loctite on it.

    Then your normal crown race sits on top of THAT, with even more shim material under it. Make it as tight as you can get it. all of this has the Loctite spread around where pieces touch, hopefully to minimize any movement.

    <img src="http://gallery.consumerreview.com/webcrossing/images/Picture013(5).jpg">
    It'll look like that. Headtube and so on is now raised another 20mm above stock for this fork!
    <img src="http://gallery.consumerreview.com/webcrossing/images/Picture015(9).jpg">

    Feels good in the parking lot testing that ensued after letting things sit and dry for the morning. No slipping/movement yet, and I made sure to bang it up and down some steps/curbs. Steers juuuuust right! Steeper than the KM fork, but slacker than the stock angle. Nice! We'll see how it does in the long term. I suspect it'll be fine.......

    Disclamer: if you try this on your own, be sure to remember, no one made you do it. You did it of your own free will, so if anything goes wrong (it breaks, and you hurt yourself. badly.) don't go and try to blame me for giving ya the idea!
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    Florence Nightingale's Stormtrooper

  2. #2
    paintbucket
    Reputation: wooglin's Avatar
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    It'll never hold because A) the only correct shim material is beer can and B) you didn't use any duct tape.
    When the going gets weird its bedtime.

  3. #3
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    Um.....uh......gee, that makes me a little nervous, you know? Let us know how it turns out in the long run for sure. Very creative work though

  4. #4
    Te mortuo heres tibi sim?
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    bu bu...... uh, duct tape helped hold stuff together while it was.....oh damn.

    yebut, i wasn't going to buy beer in a can. as it was, i had to make a special trip to the nearest 7-11 to pick up the "shim material" anyhow.
    Florence Nightingale's Stormtrooper

  5. #5
    try driving your car less
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    no JB weld? it would be cool to have something like you made machined up proper. so something that sits right on the normal place where the crown race goes, has some set length (like 20mm) and then has a spot for the crown race to go. and fits super snug.

    anyone handy with a metal lathe?

    good job on that, though. i would be a bit worried, but i bet it's fine. i cant see anything catastrophic failing, just getting some wiggling in there if the shim material disintigrated or something.
    Only boring people get bored.

  6. #6
    I am the owl
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    Headline: Man dies in freak fork accident...

    report at 11.

    Creative, but I don't think I'd trust that to real riding - the split spacer probably won't survive. Now, if you had a solid piece machined up like JH suggested, that would be pretty cool.
    SingleSpeedOutlaw .com
    Riding Bikes and Drinking Beer.

  7. #7
    Te mortuo heres tibi sim?
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    agree. the lower split one fit on "f*cking tight" is a better way to describe it. at worst, things may loosen up. if so, then back to the drawing board, or just springing again for a $$$ fork. sigh.

    hey, at least i't not as bad as some of the weight board guys drilling stuff........
    Florence Nightingale's Stormtrooper

  8. #8
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    there's a better solution...

    Keep an eye on the steerer tube, many steel steerer (like the one on my old TB-P2) are butted, and are thinner up where your crown race now sits. There's a reason the press fit area for the crown race is re-enforced.

    A better solution is a steerer tube extender - they are available from several sources, you can even get them in Ti. They press into the bottom of your head tube (like a headset cup) and you can press the headset cup into the bottom of the extender. Roadies use them. Here's a 1" version from Serrotta, I've seen others.
    <img src="https://www.serotta.com/images/HeadsextBG.gif">

    Cheers,

    Tom
    Last edited by itsdoable; 03-25-2004 at 04:25 PM.

  9. #9
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    I think its cool that you came up with it!

    Quote Originally Posted by scrublover
    So you have a rigid fork on the SS that may be a bit too stiff and unforgiving? Got another one that may be a bit shorter than your tastes? Unwilling to shell out for a high $$$$ custom fork, esp. after having a bike with one stolen, and bending another, and having the maker not seem to want to honor their crash replacement policy? Really like the way kona P2 (or other shorter) forks feel and track?

    Kids, this is for you!
    <img src="http://gallery.consumerreview.com/webcrossing/images/Picture006(19).jpg">
    So I love the KM fork I've been using, but it's still a bit too tall, and very unforgiving, even with a fat tire. Ah! Enter the Kona P2 disc only fork, direct from www.konaworld.com!
    But! it's a bit too short.
    <img src="http://gallery.consumerreview.com/webcrossing/images/Picture017(5).jpg">
    Take two 10mm aluminum threadless headset spacers (yeah, I know-this is a 5mm in the pic-used the only two 10mm ones for the project)
    <img src="http://gallery.consumerreview.com/webcrossing/images/Picture020(8).jpg">
    Take your handy Dremel tool, and cut through one of them on one side. Sand or buff all the edges smooth.
    <img src="http://gallery.consumerreview.com/webcrossing/images/Picture018(5).jpg">
    Cut apart an aluminum (aluminium for those of you across the pond and make a shim. I needed one and a half circular pieces from the can.


    The split one of the spacers goes where your crown race would normally go on the fork crown. Cram it on there; it'll be a tight fit.
    <img src="http://gallery.consumerreview.com/webcrossing/images/Picture019(6).jpg">
    I used some of this liberally applied underneath it. (Blue Loctite or somesuch.)

    Then the other spacers sits nicely atop this, with a small amount of your shim material and more loctite on it.

    Then your normal crown race sits on top of THAT, with even more shim material under it. Make it as tight as you can get it. all of this has the Loctite spread around where pieces touch, hopefully to minimize any movement.

    <img src="http://gallery.consumerreview.com/webcrossing/images/Picture013(5).jpg">
    It'll look like that. Headtube and so on is now raised another 20mm above stock for this fork!
    <img src="http://gallery.consumerreview.com/webcrossing/images/Picture015(9).jpg">

    Feels good in the parking lot testing that ensued after letting things sit and dry for the morning. No slipping/movement yet, and I made sure to bang it up and down some steps/curbs. Steers juuuuust right! Steeper than the KM fork, but slacker than the stock angle. Nice! We'll see how it does in the long term. I suspect it'll be fine.......

    Disclamer: if you try this on your own, be sure to remember, no one made you do it. You did it of your own free will, so if anything goes wrong (it breaks, and you hurt yourself. badly.) don't go and try to blame me for giving ya the idea!

    Garage inventors are where it all begins!

    KavuBiker

  10. #10
    Te mortuo heres tibi sim?
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    i agree, i'd have used one of those.....except i've only ever seen them in 1". i have two on other bikes (roadies with 1" steerers) one from serrota, and one from some anonymous ti company from canada. both only make them in 1". both at other times told me no go on having them make a 1-1/8" version. you have a source for some in that size? i and i'm sure others would love to find them!

    checked out the steer tube on this one before i did the deed; constant thickness, so far as i could tell.

    after some of the comment above....i pulled it apart, and jb welded the spacers in/on the tube.

    i think the worst that would happen would be bending the steerer at the lower end. i've already bent one rigid fork from a custom company, and it took t-boning a stump at very high speed to even do that! i think i'll be fine.
    Florence Nightingale's Stormtrooper

  11. #11
    KgB
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    I did that with pvc pipe

    on my first conversion, so what you are doing should hold up like a Chris King product.
    PBR can would have been better though.
    I've been inside too long.

  12. #12
    theHeadlessThompsonGunner
    Reputation: SDizzle's Avatar
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    You're retarded. Really.

    Let's go ride! I got a 1 x 1 for my Cham today, and it's steeep with threee E's. I kind of like it though, and think it will do good things for my handling skills in the long run. I might throw a spacer under it for a bit though, just to ease in there slowly. Not only that, it was a good place to lose four lbs all at once! I'm tossing the Kujos in favor of some Motoraptors, and then, having lost a whopping six lbs, I'm gonna make ya'll hurt.

    Speaking of retail therapy, I got some CB Mallets, and they're the shiznit. Pics to follow, but you can see them at the trailhead if you want.

    Speaking of trailheads, Lee's got a ride planned for Sunday that should be good. Interested? It's in the a.m., and he's keeping its locale hush-hush, but I'll shoot you the email. Adios. S
    "I've courted brain damage like some courtesan of darkness."


    -The Good Doctor

  13. #13
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    You're gonna die dude. Adios.
    this space left intentionally blank

  14. #14
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    Another awesome creation by Frankendave. Looks pretty cool !
    See you on P-Rim in a couple of weeks!

    T

  15. #15
    theHeadlessThompsonGunner
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    Quote Originally Posted by SSteel
    You're gonna die dude. Adios.
    Who's gonna die? And why? Adieu.
    "I've courted brain damage like some courtesan of darkness."


    -The Good Doctor

  16. #16
    Witty McWitterson
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    [hazy smoke filled room]Man, whatchoo been smokin' in them hills? Its kinda hazy in this room right 'bout now.[/still a hazy smoke filled room] Did you ever look at the Instigator fork? Or is it just as long as the KM? I'm too lazy to look right now.
    Just a regular guy.

  17. #17
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    I have one of those...

    I have one of them on my fixed cross bike (Pink IF with green components... I've posted it before as the "watermellon" bike), except It sits where it is designed to, on the TOP of the headtube. They are designed to be a stronger, safer, and stiffer alternative to headset spacers for frames with headtubes that don't extend much above the top tube. I don't think they are designed to be placed under the headtube, although I think it would work just fine (I think I actually suggested this solution to this same problem a year or so ago). I would definitely ask Serotta about the safety of this idea first, but its definitely a lot better than the make your own spacers idea in the original post. Attached is a picture of the cross bike where you can see the Ti headtube extender in its originally intended location.

    Peace,
    Ben


  18. #18
    Te mortuo heres tibi sim?
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    like i responded to a previous reply.....

    i have two of those on other bikes. one is from serotta, the other from aerolite (some canadian ti company) serotta makes only a 1", and i got no response when asking about a 1-1/8' version. the other company seems to no longer have any interest in making them in any size.


    yeah, i know they are meant to be on the TOP of the headtube. re-read my thread- my intent was to raise the whole front end up, without using the monster tall KM fork- not just raise my bars/stem.

    yeah, i'd rather have something nice and fabbed up, but the option isn't there. so i did my own. spun around on it around town this morning. no problems. i think anything i do that would mess this up, would mess up just about any other fork out there as well, except for the KM or Instigator forks maybe, or some super heavy overbuilt thing. already bent one k#lly disc fork.......
    Florence Nightingale's Stormtrooper

  19. #19
    Birdman aka JMJ
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    Had a similar setup on my wife's M2FS

    I 86ed the Judy that was on her 1996 Specialized M2FSand put an AMP Research F3XC fork on it. Only trouble was that the AMP fork interfered with the cable stops which were welded to the underside of the downtube.

    Solution: I machined a headtube spacer to fit snugly where the crown race would be, then shimmed the crown race with thin aluminum (yes, a soda can), Loctited in place. Took some swearing and elbow grease, but worked quite well (from '97 to '01 when the bike was converted to city-bike duty and the fork removed and sold off). Never jiggled or gave any trouble at all).

    JMJ

  20. #20
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    Quote Originally Posted by SDizzle
    Who's gonna die? And why? Adieu.
    scrublover is gonna die.. if he uses that craptacular, makeshift, abortion-of-a-modification.
    Jeesh, you really should pay attention to the thread...
    this space left intentionally blank

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