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  1. #1
    Toyota Racing Dev. PWRDbyTRD's Avatar
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    more powerful brakes?

    I have the Hayes Hydraulic HFX-9 XC....simply put, they're not as powerful as I'd like them to be while going downhill. I don't go offroad, but just b/c I'm in TN there are some huge ass hills and well I want something with more power to stop me. I have a 2k4 kona hoss dee lux with the marzocchi exr pro fork, any suggested upgrades?
    Linkage...My 2004 Kona Hoss Dee-Lux My Mindless Banter
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  2. #2
    snow DjRider04's Avatar
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    Most powerful brakes period - Magura Gustav's....only ones certified for Tandem use

  3. #3
    Wood Licker Maelstrom's Avatar
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    Do you have 8in rotors?

  4. #4
    Toyota Racing Dev. PWRDbyTRD's Avatar
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    no they're 6" rotors. Will my bike support 8" rotors? I'd like to keep it under 300 total and I'd like to stay hydraulic.
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    snow DjRider04's Avatar
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    Under $300 total would be hard....and your bike wont support 8inch rotors I believe....check with Kona though. The Gustavs run about $220 each....you could always get Avid mechs, I think theyre more powerful than Hayes

  6. #6
    Wood Licker Maelstrom's Avatar
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    I don't know. But 8in increase power by 33% per brake.

  7. #7
    Toyota Racing Dev. PWRDbyTRD's Avatar
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    yeah...I want 8" rotors then. LoL. What about the Avid Juicy's?
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  8. #8
    snow DjRider04's Avatar
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    The power thing is mainly due to the head factor. Is the problem your having just on long DH's....or just braking normally. Im not sure about power on the Juicys, but I imagine theyre on par with the Hayes. I imagine you could get 7inch rotors.....whats the front fork on the Hoss dee?

  9. #9
    Wood Licker Maelstrom's Avatar
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    True true. All brakes should lock (if they don't check for contamination or rebleed)...

    also with the hfx9's check the reach of the lever. Try moving it out to increase the leverage and get more hand power.

    8in rotors really only make a diff when doing prolonged dh where you engage the brakes often and for long periods.

  10. #10
    Toyota Racing Dev. PWRDbyTRD's Avatar
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    My brakes get hot and I can squeeze them all the way back to the bar, the front brake is the main problem, my back one will lock up, but my front one gets overly hot and ends up smelling once I stop. I called the LBS and they recommended Shimano® Saint BR-M800 Disc Brake System, any good?
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  11. #11
    Wood Licker Maelstrom's Avatar
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    You need bigger rotors and you need to stop using your brakes so much. Classic big man rider syntdrom

  12. #12
    Toyota Racing Dev. PWRDbyTRD's Avatar
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    LoL! It's like a good 1/4+ coast all downhill from my house to the main road...what am I to do how do I stop using my brakes so much. LoL. You tell me?! What about those Saint's?
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  13. #13
    Work hard, Play hard forum*rider's Avatar
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    Saint's need centerlock hubs don't they? So you would be buying new wheel(or atleast the hubs) and new brakes. Of course I could be wrong.....

    IMO most hydro discs are the same, as long as you can lock up the wheels thats as much power as your going to get. I would just go for some Hayes HFX-9HD w/8inch rotors or something like that.

  14. #14
    Back to granite skunkty14's Avatar
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    Quote Originally Posted by PWRDbyTRD
    I can squeeze them all the way back to the bar
    I was having a similar problem a few months ago with my Magura's Julies (which I don't recommend) and was able to solve it by bleeding the brake lines and calipers. You may just have lost some fluid in the system and be squeezing on some air. You might also need to adjust the reach as suggested by another post, but bleeding couldn't hurt IMHO. Good luck.

    Tyler

  15. #15
    Toyota Racing Dev. PWRDbyTRD's Avatar
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    Alright. Bleeding has been done, so that isn't the problem. The brakes (the front ones anyways) get very hot, very quick, and lose their stopping power. I am looking into the Avid Juicy 7's
    http://www.hawleyusa.com/Webstore/It...owseItems.aspx
    and the Hayes HD line http://www.hawleyusa.com/Webstore/It...owseItems.aspx

    I already have hayes on the rear, so I'd prefer to stick with hayes, any overwhelming reason why I should go with avid instead? Also, I think I'm just going to replace the front one since that's the only one currently giving me problems.
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  16. #16
    Time for a change. stapfam's Avatar
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    Quote Originally Posted by PWRDbyTRD
    I have the Hayes Hydraulic HFX-9 XC....simply put, they're not as powerful as I'd like them to be while going downhill. I don't go offroad, but just b/c I'm in TN there are some huge ass hills and well I want something with more power to stop me. I have a 2k4 kona hoss dee lux with the marzocchi exr pro fork, any suggested upgrades?

    Try going up on Disc size. I Use 200 mm f&R and they stop.

  17. #17
    Toyota Racing Dev. PWRDbyTRD's Avatar
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    That's what I'm planning on doing I'm looking into the 203mm HD hayes and the 203mm Avid Juicys
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  18. #18
    The Man. FoX Rider's Avatar
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    Can't you just roll most of the hill and only use the brakes at the end? The nines shouldn't lock up. The leverage screw is messed up on mine too. Try loctiting it. Works for some people. Didn't seem to work for me.

    You should look into getting 8" rotors and new adapters so you can use em. That would probably cost you $50-$75.

    Odd, my front brake wasn't anywhere nearly as bad with the leverage screw backing out problem as the rear.

  19. #19
    The Man. FoX Rider's Avatar
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    Quote Originally Posted by PWRDbyTRD
    That's what I'm planning on doing I'm looking into the 203mm HD hayes and the 203mm Avid Juicys
    Try just getting new rotors because replacing it all with Avid brake systems.

  20. #20
    Toyota Racing Dev. PWRDbyTRD's Avatar
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    that's the problem...I wait til the bottom of the hill and use my brakes (except for two corners where I use the brakes for a few seconds) and they still don't have adequate power...can I upgrade my current brakes by just getting different rotors and some kind of an adapter? If so can someone help me out with some links maybe? Thanks!
    Linkage...My 2004 Kona Hoss Dee-Lux My Mindless Banter
    Disclaimer: I'm 425lb...I put unnormal loads on my bike. This should help you in answering any of my questions.

  21. #21
    Toyota Racing Dev. PWRDbyTRD's Avatar
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    I found the rotor without problem, but I am a little confused as to which one of these I get. LoL. I have a marzocchi EXR Pro 100mm fork and the Shimano HB-M475 disc Hub. So which do I get? http://www.jensonusa.com/store/product.aspx?i=BR708C16
    IS 20mm thru axle forks, 74mm post, boxxer or all I.S. Frames? there are descrips on the site, I'm just a little unsure w/ what to get.
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  22. #22
    snow DjRider04's Avatar
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    I dont think 8inch rotors would fit on that fork...or on that frame, check before you blow $75.

  23. #23
    Senior Member swifferman's Avatar
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    Quote Originally Posted by PWRDbyTRD
    that's the problem...I wait til the bottom of the hill and use my brakes (except for two corners where I use the brakes for a few seconds) and they still don't have adequate power...can I upgrade my current brakes by just getting different rotors and some kind of an adapter? If so can someone help me out with some links maybe? Thanks!

    I think he means wait till you're coasting after the hill, unless that's what you mean too...

    Have you tried just breaking a little at a time down the hill to maintain a more constant (but lower) speed?

  24. #24
    Toyota Racing Dev. PWRDbyTRD's Avatar
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    here is the problem it's alllll down hill til I hit a main road. Only problem is there is no room for "coasting" to slow down. It's all down hill til I hit the main road, otherwise I'd coast as much as i can
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  25. #25
    Campy or bust :p cryogenic's Avatar
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    The road is completely downhill directly into a cross street at which point he HAS to stop. It's not like he can coast out into the cross street and slow down that way. It's a pretty busy road so stopping is his only option. The big problem is that those 6" rotors are being asked to stop a 450 lb rider and a 33 lb bike. I don't think they're made for that. lol

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