I have a Schwinn GTX3 Hardtail with a M3010 Suntour fork. I looked up the model number on the back of the left leg and it is supposed to have a preload adjuster available. However, mine does not for some reason. I was wondering if it would be possible to install a preload adjuster or lockout if I buy the parts, even if it does not have them on currently. (Btw: The fork is the one that originally came with the bike model.)

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The following exploded diagram for something called SR Suntour SF15-M3010-A-P-26-50 lists a "CONTROL ADJUST SYSTEM" as part number FKE007-11 . Depending on whether your fork is a compatible one or not, this might be the part your are looking after.


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  • I looked at my bike and I realized that both sides of my cap had the fixing caps, while the model there has a preload adjuster on one side. Since it is the same model, would it be possible to simply buy the part from amazon or a bike dealer and install it? From the looks of it, my fork has all the same parts except for the preload adjuster. – C4 Patino May 22 at 18:41
  • Well, it is hard to tell for sure unless the internals of two forks are identical. You can disassemble your fork to learn this for yourself. You are likely to need a special tool to undo the top caps, see e.g. youtube.com/watch?v=tABGvESjL4o – Grigory Rechistov May 22 at 20:46

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