Currently 8 speed, can I go 9 speed?

Bucksspeedyboy
Bucksspeedyboy Posts: 59
edited June 2013 in Workshop
Hi,

I have a 2008 spec Trek 1.2 that currently has a SRAM 850 8 speed cassette. I am looking to change the cassette and chain for the first time and I wondered if I can upgrade to a 9 speed cassette/ chain without any other mods? The 2009 Trek 1.2's were fitted with SRAM PG950 cassettes, could I just fit one of those and will the rest of the gear mechanism work with 9 speed, or do I have to stick with an 8-speed cassette if I don't change anything else?

Comments

  • slowbike
    slowbike Posts: 8,498
    No - you'd need to change the STIs too ...
  • doug5_10
    doug5_10 Posts: 465
    . . . and the rear derailleur
    Edinburgh Revolution Curve
    http://app.strava.com/athletes/1920048
  • nicklouse
    nicklouse Posts: 50,675
    doug5_10 wrote:
    . . . and the rear derailleur
    no the OP would not the 8spd could be happily used.

    but STIs, chain,cassette will be needed and a front mech recomended but the old one will work.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • doug5_10
    doug5_10 Posts: 465
    nicklouse wrote:
    doug5_10 wrote:
    . . . and the rear derailleur
    no the OP would not the 8spd could be happily used.

    but STIs, chain,cassette will be needed and a front mech recomended but the old one will work.

    Ah, OK. Makes sense i suppose, it wouldn't be overstretched at either limit since it will be shifting across the same distance of block, just using a thinner chain and closer spaced cogs?
    Edinburgh Revolution Curve
    http://app.strava.com/athletes/1920048
  • Bucksspeedyboy
    Bucksspeedyboy Posts: 59
    Thanks for the replies guys - I'll stick with an 8-speed cassette.

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