Mountain Bike Setup Questions

Discussion in 'Australia and New Zealand' started by Rod Out Back, Dec 27, 2005.

  1. Rod Out Back

    Rod Out Back Guest

    Folks,

    Just getting back into riding a bike for exercise, and have a couple of
    questions regarding setup. Bike in question is a Giant AC 06.

    1) What tyre pressue should I be running the tyres at? I am riding almost
    solely on dirt tracks around the property, and tyres are Kenda Bluegroove 26
    x 2.5. They are quite soft & spongey by the feel of them, so I am inclined
    to increase tyre pressue to around 45-50psi(They came with 20psi in them
    from the dealer). If I leave them too soft, they will most likely last a few
    days before the first puncture. Is this the right pressure? Too low or too
    high??

    2) These Kenda tyres seem to be a bit light/sparse in the tread to last long
    out here(outback QLD), and I suspect I am going to have a bitch of a time
    with thorns between the lugs. Are there any reccommended brand/models that
    have a more extensive pattern of lugs on the tyre? The tyres are 26x2.5,
    which seem a bit less common to find; most online stores dont seem to stock
    them. I see there is a Syncros Point & chute tyre that might be more the go,
    as well as a DMR Moto R/T tyre thatmight also suit. Any thoughts on either
    of these?

    3) Rear shock preload on this bike is set by an adjustment collar on the
    spring. On motorbikes, you either use a C-spanner, or spanner if they have
    flat sides on the adjustment collar. On this one, it is round, with a bit
    of a rough surface. Best guess is something like multi-grips or vise-grips,
    but both of these are going to chew the surface up somewhat. Is there a
    tool for this, or are the multigrips the go?? I see the Fox rear (Coil)
    shocks are fitted with what look to be adjust. collar that uses a tool of
    some sort.

    4) Is there an adjustment to set the preload on the front fork shocks
    (Manitou Stance Blunt 150mm)? I wondered if there was a preload setting
    under the hex nuts on the very top of each fork, but arent game to take them
    off without knowing what I am doing. I also dont understand how the rebound
    dampening adjust seems to be on one shock only? Is there an equalisation
    tube between the shocks? I've searched the Manitou site, as well as general
    searchs for 'how-to' info on setting up the front forks, but nothing usefull
    shows up so far. I've even read the (pretty sparse) manual!! If anyone can
    point me at an online resource that gives me the basics; I would be more
    than grateful.

    5) Anyone got a good way to fast-track a broken collarbone?? Bike turned up
    3 days after I flipped my motorbike while mustering. I am doomed to
    spending the next 3 or so weeks looking at this bike sitting on the
    verandah. Ahhh well, it has allowed me time to get some odds & ends for it
    to set it up to suit me before I take it out.

    All these questions; so little time (actually another 3 weeks at least).
    Dealer is 350kms away, so it's a bit tricky to run the bike back to him to
    do the setup for me.

    Any thoughts or suggestion gratefully received.

    Cheers,

    Rod.......Out Back
     
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  2. Random Data

    Random Data Guest

    On Wed, 28 Dec 2005 03:23:49 +0000, Rod Out Back wrote:

    > 1) What tyre pressue should I be running the tyres at?


    With an AC and 2.5" tyres, I'd suggest somewhere between 35 and 45 psi as
    a starting point. Too high an the ride will be harsh and skittish, too low
    and you'll flat.

    > 2) Are there any reccommended brand/models


    The Syncros is a fairly tight tread pattern, but it's a relatively
    lightweight tyre. Maybe look at the Maxxis High Roller in 2.5". If you're
    just riding about you can go as low as 2.1" without a real problem, but
    I'd say stick with 2.3 to 2.5 for the moment. See how the existing tyres
    go before you do anything more. http://www.phantomcycles.com.au should be
    your friend in this

    > 3) Rear shock preload on this bike is set by an adjustment collar on
    > the spring.


    Just use your hand. You shouldn't be putting more than 2-3 turns of
    preload on anyway, otherwise you'll be risking coil bind on a big hit. If
    that's still too soft, look at a heavier spring. You should normally get
    around 25% of the travel as sag, though Platform valving on modern shocks
    makes this a little trickier to observe.

    > 4) Is there an adjustment to set the preload on the front fork shocks
    > (Manitou Stance Blunt 150mm)?


    Maybe, but it'd be best to check for a manual either in the supplied
    literature or online. If you can't see anything obvious there may not be
    adjustment, but I don't know Manitou forks that well.

    > 5) Anyone got a good way to fast-track a broken collarbone??


    There was an article on Cyclingnews.com during the tour about fixing them
    - apparently pinning gets you to a rideable state in a few days IIRC.
    Probably still painful though.

    --
    Dave Hughes | [email protected]
    Random miscellany, as opposed to that other kind of miscellany
    - Patrick Shaughnessy
     
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