Setting up forks

Storyline
Storyline Posts: 5
edited May 2018 in MTB beginners
Hi

New to the forum and also new to front suspension

I have just got a Cannondale Quick CX3 which has SR Suntour NCX forks.

On one side at the top of the fork there is lockout which I understand but the other has 'Preload' and a + and -. I have read about settiing Sag but am unsure how to adjust them. The knob moves smoothly through 180 degrees and then does a double click but will continue to move. I cannnot discern any differnce in stiffness in the 180 degree travel but dont want to start turning too much in case I am going too far and that the 180 degree is the limit. I am not even sure if moving to the +ve increases or decreases stiffness.

The supplied manual is hopeless IMO. It does not show the Preload knob but shows some kind of fitting to the bottom of the fork. There is a CD but that does not even have a Welcome page but just a load of pdf's covering both spring and gas forks. I dont even know which one mine is but I suspect spring.

Any info would be most welcome. The full tech spec of the fork is: SR Suntour NCX, 1-1/2"to 1-1/8" tapered, Lockout, 50mm

Comments

  • cooldad
    cooldad Posts: 32,599
    There are loads of different versions, but if one of the fork legs doesn't have an air cap, they are steel springs.

    The knob will be preload, but don't expect too much variation, and the bit at the end of the fork presumably rebound adjustment.
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  • Storyline
    Storyline Posts: 5
    Thanks cooldad :)

    Yes, I have discovered that the clicking noise represents one unit of adjustment and I have tried going from one end to the other and there seems to be minimal difference. I was sceptical about how useful they actually were considering the extra weight they have but have tried the cable tie test and in just relatively smooth cycling on a road with a poor surface they did actually compress quite a bit so must have smoothed things out. I know the bike feels a lot smoother compared to my road bike but I had put that down to the larger tyres. With lockout engaged however the difference is subtle.

    If I upgraded to air forks would I notice a big difference ?
  • supersonic
    supersonic Posts: 82,708
    Preload doesn't change the actual spring rate of the fork - it alters the force required to start it moving and hence how much it sags under a static load. Though in practice it can often feel like they are stiffer/softer, but as above, the adjustment is usually small.

    An air fork will allow you to set the spring 'stiffness' more precisely, but they can 'ramp up' towards the end of the stroke.