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  1. #1
    mtbr member
    Reputation: crossracer's Avatar
    Join Date
    Jun 2004

    Ok, I have to ask, dumb question time.

    But I have been out of mtn bikes for a while. Just getting back into it.

    I hear people refer to rear der with clutches. What does this mean? Do? Help?

    Thanks everyone.


  2. #2
    Reputation: tigris99's Avatar
    Join Date
    Aug 2012

    Re: Ok, I have to ask, dumb question time.

    One way clutch bearing to help with chain slap as it keeps the derailleur from snapping and bouncing thus better maintaining constant chain tension.

    That's my best understanding of how they work from reading up on them, I ride HT and have a stay protector so didn't bother with spending the extra on a clutched derailleur.

    Sent from my HTC Sensation Z710e using Tapatalk 2

  3. #3
    mtbr member
    Reputation: icecreamjay's Avatar
    Join Date
    Apr 2004
    tigris has it right. Its pretty new technology, basically putting a little clutch in the derailleur to buffer it against big bounces. Basically to keep the drivetrain quiet and also to keep even tension on the chain, so it doesn't bounce around and drop off the front rings.
    NEMBA Freetown VP

  4. #4
    dwt is offline
    mtbr member
    Reputation: dwt's Avatar
    Join Date
    Jul 2009

    Ok, I have to ask, dumb question time.

    One more point. 1X systems are popular now. One chainring up front (your choice) anywhere from 8, 9, 10, even 11 speed cassette. 1X is a cousin of single speed, more complicated because of rear der and gears, but simpler than any bike with 2 or 3 chainrings and front der. I personally went from SS to 1X9, not so much for lower gears going up, but for higher gears flat and down. The worst part of SS IMO was spinning out, not grinding climbs. Spinning out wastes time and is BORING, grinding climbs makes for strong quads and I always had fun challenging myself to see what I could clean in a high gear.

    Anyhow, the problem with 1X until recently was that you simplified your bike by substracting chainrings and front der. only to have to recomplicate the bike by adding a chain guide in order to keep the chain on. Not to mention lay out some coin. The clutch rear der. plus funky teeth patterns on front chainrings made by SRAM and Wolf Tooth components (wait for more very soon) eliminate the need for chain retention devices. I'm waiting for WT to finish and start selling direct mount
    Spline 30T right now for a 1X10 650b trail bike

    Hope this was informative and Welcome back to mtb
    Old enough to know better. And old enough not to care. Best age to be.

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