fox 3.0 rear shock rebound

Skit
Skit Posts: 58
edited September 2007 in MTB workshop & tech
hi,

ive got a fox 3.0 rear shock on my kona stinky and when i first got it the spring was too strong for me so i got a lighter spring but i dont really know whether my bike shop set it up very well because the rebound is pretty slow but its its on the fastest rebound setting.
is this something to do with the ratio between spring and air so if i put the spring softer and the air harder would that sort it out. im very confused.

any adivce would be much appreciated.

saul.

Comments

  • nicklouse
    nicklouse Posts: 50,675
    which shock?

    fox have a few 3.0 shocks.

    DHX coil?

    my first question is have you got the manual?

    second is the sag correct?

    do you know what the air is actually for?
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • Skit
    Skit Posts: 58
    yes sorry dhx coil

    ive got the manual but its quite hard to understand it says lots of shock parts i dont know etc.

    yes the sag is right.

    and no i dont know what the air is for. i dont know how it works really, ive asked in a couple of bike shops but i really havent understood their explanations, despite thier repititions

    saul
  • nicklouse
    nicklouse Posts: 50,675
    on the DHX coil 3.0 the air effects the compresion only. more air more comprsion damping. (the speed that the rear wheel moves up). then you have the rebound dial (red) and that controlls how fast the wheel moves down.

    first think i would do is make sure that the rebound dial is moved the correct way.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • Skit
    Skit Posts: 58
    what as in fully faster rebound
  • nicklouse
    nicklouse Posts: 50,675
    turn it fully anti clock wise to make it rebound faster.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • Skit
    Skit Posts: 58
    yes thats whats confusing its on full but the rebound is really slow thats why i thought it may have been poorly set up

    saul
  • nicklouse
    nicklouse Posts: 50,675
    you are turning it the correct way. as rebound fully one will be slow. you want it off.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • Skit
    Skit Posts: 58
    i dont understand what your saying. it says on the red dial, faster rebound one way a slower rebound the other way and ive got it on faster rebound as far as it will go and its still slow.

    so if the air does the compression then i asume the spring does the rebound so if i tightend the spring would that make the rebound faster and then i could put the red dial half way between the two so i could fine tune it easily. am i getting completely the wrong idea?
  • nicklouse
    nicklouse Posts: 50,675
    Skit wrote:
    i dont understand what your saying. it says on the red dial, faster rebound one way a slower rebound the other way and ive got it on faster rebound as far as it will go and its still slow.
    Most just say rebound slower.

    the spring is only to support you and get the sag right.

    it has nothing to do with the rebound directly.

    No i have to ask this you are a real light weight?

    if yes you will need custom valving as the spring could now be to light.

    i am the opposite.

    lets have some figures.

    your weight.

    spring numbers eg 300lbs

    shock stroke

    and finally the bike travel.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • Skit
    Skit Posts: 58
    hi sorry for the delaid response my bikes been in the shop to have its brakes bled.

    ok well

    ye im only 15 and i small for my age so i weigh 48kg

    my spring numer are 300x3.24

    and my bike has 7 " travel
  • Skit
    Skit Posts: 58
    so whats custom valving
  • Don't set the air pressure in the chamber below 75psi, as it'll damage the shock.

    Custom valving allows the shock to be set up for the individual rider, and their preferences.
    You may need lighter oil in the damping circuit to allow for your lower weight, to get the rebound to work faster.
    Then, the piston, and shims which control the oil flow on the compression stroke will need to be adjusted to give you the desired performance to suit your riding style. Otherwise, the shock will bottom out too easily.
    The good thing about custom valving though, is that the shock can be made "speed sensitive". So you only get as much damping effect as you need.
    So during multiple hits, the rear wheel returns faster (lower in the stroke), and for smaller hits, the low speed compression & rebound damping is more controlled to dial out pedal induced bob.

    For more info, contact MOJO on 01633615815.
    It's nice to be important, but it's more important to be nice.
  • Skit
    Skit Posts: 58
    wow i always wondered if you could do that. have is realy responsive and sensitive over small terain but then still be able to cop with big hits. so could a get this done in a bike shop?
  • nicklouse
    nicklouse Posts: 50,675
    send them to mojo along with info such as you weight (when riding ie. kitted up) the bike and the travel.

    have a look on mojo's webby for the form to fill in. or take it to a shop and they can send it in.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown