New chain cassette and still slipping, any ideas?

billysewartcrf
billysewartcrf Posts: 196
edited June 2011 in MTB workshop & tech
As title says I'm having a tad problem with my drivetrain, basically I've got a Ragley mmmbop running xtr front mech, xt rear, a brand new (fitted tonight) SRAM pg990 and a brand new KMC x9 chain.
If I ride slowly putting the brakes on with it in middle on the front and rear, and put pressure on pedals it still seems to be skipping on the front, know I've shortened the chain correctly and the middle ring on the front seems in good condition,
What's my next option do I just change the ring for a new one? Any help would be great.
Specialized Tarmac - Team bike
Kinesis Grand Fondo Ti - Year round training bike
Kinesis Pro 6 - CX bike
Orbea Alma 29er - MTB

Trek madone 5.2- Sold
Ragley Marley Mtb- Sold

http://www.team-chronomaster.com
http://www.leisurelakesbikes.co.uk

Comments

  • Dave_P1
    Dave_P1 Posts: 565
    It sounds to me like your front chain ring is worn if it's slipping on a new chain and cassette.
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  • nicklouse
    nicklouse Posts: 50,675
    well there are only 3 places that any slippage can happen.

    over the front or rear cogs. (2) or the body.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
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  • bails87
    bails87 Posts: 12,998
    I had this when I replaced my chain, despite only just being on 0.75% wear. So I got a new cassette and that didn't fix it, when I got a new middle ring the skipping stopped.

    If you're like me then you're in the middle ring most of the time so it's more worn than the other rings or most of the cassette. Replace it with a steel (Deore) ring ring and that'll last much longer.
    MTB/CX

    "As I said last time, it won't happen again."

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