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  1. #1
    Senior Member neilfein's Avatar
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    May 2007
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    Highland Park, NJ, USA
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    "Hildy", a Novara Randonee touring bike; a 16-speed Bike Friday Tikit; Dahon Curve D3 folding bike; a green around-town cruiser; and a Specialized Stumpjumper frame-based built-up MTB.
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    Stumpjumper fork sizing

    Hello,

    I'm building up a MTB, based around a 1994 Specialized Stumpjumper frame. My LBS tells me I need a 1 1/8" fork, but I'm confused as to what this actually means.

    Craigslist, eBay, and the BF for-sale threads are my parts sources. Will a 1" stem and 1" fork work in this frame? They seem to be easier to find. I assume I'd need to find some sort of adapter, but I'm not sure how to measure all this.
    Tour Journals, Blog, ride pix

    I'm in the celtic folk fusion band Baroque and Hungry. "Mended", our new full-length studio album, is now available for download.

  2. #2
    Senior Member bikeman715's Avatar
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    Mar 2008
    Location
    Salinas , Ca.
    My Bikes
    Bike Nashbar AL-1 ,Raligh M50 , Schwinn Traveler , and others
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    the 1 1/8" fork mean the diameter of the steering tube (which goes into the head tube of the frame) is 1 1/8 " and nothing else will fit. The 1" fork will not fit because it to small. use a set of caliper to measure the steering tube.

  3. #3
    Rat Bastard mcoomer's Avatar
    Join Date
    Jul 2006
    Location
    Sammamish, WA
    My Bikes
    Cannondale Prophet, Specialized S-Works SL2, Specialized S-Works Stumpjumper
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    I've never researched it but you may be able to buy an adapter to allow you to use a 1" steerer in the 1 1/8" head tube but I'd recommend against it. For a mountain bike I want as much beef there as I can get. Most modern forks have a 1 1/8" steerer, but some of the latest bikes have headtubes that start at 1 1/2" and neck down to 1 1/8" at the top. Hit up Craigslist and/or EBay and you should find plenty of forks to suit your needs. You probably don't need a fork with lots of travel either, maybe 110mm or so for your hardtail.

    Mike
    It's better to burn out than fade away...or slip out of your pedal and face plant on the side of the road!!!

    '06 Cannondale Prophet
    '08 Specialized S-Works Stumpjumper
    '09 Specialized S-Works Tarmac SL2

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