Mountain Bikes · Public discussion

How to fit a new fork

Started by nordtrekker · · Last activity · 3 posts · 1,399 views

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Mountain Bikes
Published
10 October 2004
Last activity
11 October 2004
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nordtrekker
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  1. Im looking to replace the fork on my bike (cracks in places), but need to know what to look for. Im looking for a carbon design, no suspension. What size information do I need to know?

    Thanks

  2. Find out what size wheel you have on your front end. If it is a mountain bike, it is 26".

    You need to know if you have a threaded or threadless stem. Threaded is the old kind with the screw-on headset lock nut and quill type stem.

    Measure the diameter of the steerer tube (the tube that is welded/pressed/machined onto the crown of your current fork). It should be likely be 1.125" (1 1/8"😉 but could be 1", 1.25" or 1.5". It is critical that your new fork must match this.

    Measure the height of your steerer tube if the head tube on your bike looks overly long, to ensure the steerer tube of your new fork will be long enough.

    If you run disk brakes, you need disk brake mounts. If you run disk brakes you need to know if your rotor is 6" or 8".

    If you run cantilever or linear pull brakes, you just need rim brake studs, they work with either.

    So, when you walk into a bike shop you might place an order that sounds like "I need a non-suspension carbon fiber fork for a mountain bike with a 26" wheel. 1 1/8" threadless steerer tube. For linear pull brakes."

    Cheers,
    Juba

  3. Excellent, thank you. 🙂

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