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  1. #1
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    Disc Brake stopping power

    Hi,

    I just got my first MTB with disc brakes... a 2005 Cannondale F600. The brakes are Avid BB5's.

    Is it normal for the braking power not to be absolute? For example, if I apply the brakes all the way, I can still (with a lot of effort) make the wheel turn. As opposed to my old V-Brakes where when applied all the way... I couldn't make turn regardless of how much I tried to turn the wheel.

    I aligned, cleaned the rotors with rubbing alcohol but still the same.

    Thanks for the help.


    aaron

  2. #2
    AKA Frank N. Bike!!
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    What levers are you running?
    My Bike: '03 Specialized HardRock FrankenBike
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  3. #3
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    They are Cannondale Fire levers.

    Oh... also did check the brake pads... they seem to still have good life left.

  4. #4
    AKA Frank N. Bike!!
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    I don't know if they are the problem but sometimes certain levers do not have the pull needed to give you full stopping power. When I had my BB5s I used Tektro levers but someone told my Avid levers worked the best. Sorry. I don't know if this helps.
    My Bike: '03 Specialized HardRock FrankenBike
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  5. #5
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    Sorta. I have another Cannondale with Cannondale Fire levers but with V-Brakes and they work perfect. Wonder if anyone else has a similar set up that could compare. This is the first time I have been on disc brakes... is that the way they just are? Not complete lock up?

  6. #6
    AKA Frank N. Bike!!
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    No - mine can lock up the rear wheel at speed and almost lock the front as well with a good squeeze.
    My Bike: '03 Specialized HardRock FrankenBike
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  7. #7
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    Do you think if the last owner put lube or oil onto the rotors... It would cause this?

  8. #8
    AKA Frank N. Bike!!
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    Yep. It would contaminate the pads. Did you try taking the pads out and lightly sand them down?
    My Bike: '03 Specialized HardRock FrankenBike
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  9. #9
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    I didn't but will try that in the morning... just read that tonight somewhere else too...

  10. #10
    I Tried Them ALL... Moderator
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    The Cannondale Fire(Tektro) levers plain suck. Upgrade them with Avid Speed Dial or the cheaper FR-5 levers, and get more power with less pull.
    "The mind will quit....well before the body does"

  11. #11
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    Thanks... I think I am going to do exactly that...

  12. #12
    PCC
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    Quote Originally Posted by Zachariah
    The Cannondale Fire(Tektro) levers plain suck. Upgrade them with Avid Speed Dial or the cheaper FR-5 levers, and get more power with less pull.
    Absolutely! In hindsight, I may have kept my BB-7s had I upgraded the levers back in the day but I upgraded to hydraulics instead on my Prophet. I put BB-7s and Speed Dial levers on my son's bike and am amazed at the braking power from this setup. Compared to the original brakes that came on my Prophet there is no comparison. The difference being the levers.

  13. #13
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    You might just need new pads or a different compound. Each time you clean/sand or replace your pads/rotors keep in mind that it will take a little while to develop full braking power as they need a bit of time to bed in. There's also a disc brake FAQ in the upper right corner of this page you might find useful.
    "...the people get the government they deserve..."
    suum quique

  14. #14
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    Did you ever figure out your problem? I'm having the same issue.

  15. #15
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    I got a set of Avid levers. They are a bit better but still doesn't lock the wheel completely. I went to REI and checked out some other disc brakes. Some seemed to lock entirely, others not. I think that is just the nature of the beast.

    Weird, b/c my old V-Brakes... all of them, locked the wheel completely.

  16. #16
    I Tried Them ALL... Moderator
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    A combo of smooth cables and Avid levers will greatly improve stopping ability of mechanical discs to about 90% of hydraulic discs.
    "The mind will quit....well before the body does"

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