Page 1 of 9 123 ... LastLast
Results 1 to 15 of 131
  1. #1
    Grasshopper
    Join Date
    Oct 2007
    Posts
    28
    Rep Power
    4

    Saint 820 brakes inconsistent bite point - any fixes or solutions yet?

    I know this is somewhat of a known issue (unfortunately found out after I bought my two sets).

    Done plenty of reading and researching on this, but nothing definite as far as a cause or fix. Anyone heard anything?

  2. Advertisement - Log in or Register to hide this ad
  3. #2
    Monkey Freeridin''s Avatar
    Join Date
    Oct 2006
    Location
    Colorado
    Posts
    320
    Rep Power
    4
    Not a fix but can be warrantied...not sure if the replacements are any different.

  4. #3
    just shake your rump Sandwich's Avatar
    Join Date
    May 2002
    Location
    whahlthahm, MAH
    Posts
    12,545
    Rep Power
    13
    Make sure you have a good bleed. My 810s were inconsistent until I had a really good bleed on them using CHF 7.1. Then they were reliable for a year after. Just make sure to tap tap aroo the lever to get any hidden bubbles out.

  5. #4
    Turbo Monkey kickstand's Avatar
    Join Date
    Sep 2009
    Location
    Fenton, MI
    Posts
    1,930
    Rep Power
    3
    Ask Aaron Gwin's mechanic.

  6. #5
    Celebrating No-Pants Day kidwoo's Avatar
    Join Date
    Aug 2003
    Location
    In my pants
    Posts
    16,761
    Rep Power
    15
    Udi had a pretty good explanation here that made sense to me. It has more to do with the quad piston caliper than anything else. Makes sense because every pair of saint 4 pots I've had do that. Not a single pair of shimano 2 pots have ever done that to me.
    STRAVA: Turn your dork logger off when you're on unsanctioned trails numbnuts

    Switchacks = woodland based crimes against humanity

  7. #6
    Grasshopper
    Join Date
    Oct 2007
    Posts
    28
    Rep Power
    4
    Yeah, def have a good bleed on them with all the tricks, tapping the line, push fluid up from caliper, gravity bleed it, pump fluid down from the lever, rotate lever 30 degrees up, 30 degrees down, etc.

    Kidwoo, interesting all your 4 pots have done this. I've heard there are no issues with the XTR trail brakes which have the same lever, but just 2 pistons. So that would backup what you and Udi are saying. But do you or Udi know what specifically it is about the 4 pots that make them have this inconsistent bite point?

    Kinda unnerving thinking you are going to lightly feather your brakes and instead you lock them up, or worst case vice versa.

    Would the XTR trails work on a full blown DH bike, with 203 rotors? Obviously I think they'd be fine with 180 rotors on my trail bike.

  8. #7
    Monkey boylagz's Avatar
    Join Date
    Jul 2011
    Location
    SF bay area
    Posts
    473
    Rep Power
    2
    ^ I have 785 XT trail brakes and they are powerful. Ive used Avids before from Juicy 7 to Codes, and these are the best brakes Ive used so far. Ive never felt underpowered, and they modulate nice. Im loving the shorter levers vs. the Avid blades.

    Get em xtr's.

    Add: Brakes mounted to a V10c.
    Last edited by boylagz; 02-06-2013 at 01:28 PM.

  9. #8
    Monkey 0110-M-P's Avatar
    Join Date
    Jun 2009
    Location
    Raleigh, NC
    Posts
    240
    Rep Power
    3
    Even the very old shimano 4-pot XT's had this problem (and were an absolute PITA to bleed completely). You couldn't pay me enough money to buy another set of shimano 4-pot brakes again.
    '14 Canfield Jedi | '12 Canfield DJ | '12 Transition Bandit

  10. #9
    Monkey
    Join Date
    Apr 2011
    Location
    East Tennessee
    Posts
    265
    Rep Power
    2
    I too had similar issues with my Shimano 810's. I sold them and got Hope brakes and never looked back. Maybe you could get them warrantied and then sell the set they send you for something else?

    -Brett

  11. #10
    Celebrating No-Pants Day kidwoo's Avatar
    Join Date
    Aug 2003
    Location
    In my pants
    Posts
    16,761
    Rep Power
    15
    Quote Originally Posted by rscecil007 View Post
    Kidwoo, interesting all your 4 pots have done this. I've heard there are no issues with the XTR trail brakes which have the same lever, but just 2 pistons. So that would backup what you and Udi are saying. But do you or Udi know what specifically it is about the 4 pots that make them have this inconsistent bite point?

    Kinda unnerving thinking you are going to lightly feather your brakes and instead you lock them up, or worst case vice versa.

    Would the XTR trails work on a full blown DH bike, with 203 rotors? Obviously I think they'd be fine with 180 rotors on my trail bike.
    If I remember correctly Udi was saying something along the lines of the pistons not being able to uniformly contract between all 4 of them. I think it's just that it's a lot easier to either get air trapped in the big caliper, or in a case where you have one piston that moves a lot more freely than even one other one, that loose one is going to move a bunch in reference to the others. I know the first gen of 4 pot saints I had took forever to settle out and start working consistently. Bleeding over and over wouldn't do it but one day, they just started working consistently. Broken in?

    All I know is that where I live and with what I weigh, I don't need big fatass calipers to disperse heat. Until shimano gets that worked out, I'll be happily buying 2 pots for all my bikes. I do have that same pair of broken in calipers on my dh bike right now with some zee levers. They work great. But it took almost a full season two years ago to get them to that point.
    STRAVA: Turn your dork logger off when you're on unsanctioned trails numbnuts

    Switchacks = woodland based crimes against humanity

  12. #11
    Turbo Monkey daisycutter's Avatar
    Join Date
    Apr 2006
    Location
    New York City
    Posts
    1,397
    Rep Power
    5
    My Saint 810s have ben great since 2010. I have bled them once a year. I was tempted to upgrade but will now keep what i have. Thanks for putting the word out.

  13. #12
    Monkey Freeridin''s Avatar
    Join Date
    Oct 2006
    Location
    Colorado
    Posts
    320
    Rep Power
    4
    The inconsistencies on the 820s do not compare to the 810s or current xt/xtr. At random, the lever will turn to a hair pin trigger, one or two pulls later it returns to normal. I've never experienced anything similar with my 810s (3 sets) or my current xts.
    Last edited by Freeridin'; 02-06-2013 at 03:19 PM.

  14. #13
    Monkey SylentK's Avatar
    Join Date
    Feb 2004
    Location
    coloRADo
    Posts
    813
    Rep Power
    6
    This is interesting on the bleeding technique. Isn't shimano's method to use the funel and do gravity style? Is using Avid's syringes and technique the way to go?
    Hey Brother Pour the Wine!

  15. #14
    Grasshopper
    Join Date
    Oct 2007
    Posts
    28
    Rep Power
    4
    Quote Originally Posted by SylentK View Post
    This is interesting on the bleeding technique. Isn't shimano's method to use the funel and do gravity style? Is using Avid's syringes and technique the way to go?
    Well Shimano's method per their tec doc website is to:
    -push fluid up slowly from the caliper with the syringe, and push the fluid into the funnel screwed into the lever
    -gravity bleed it
    -tap the caliper/line gently with a screwdriver
    -pull the lever slightly and open the bleed nipple and close it very quickly a few times
    -set the lever down 30 degrees and squeeze the lever a few times
    -lastly repeat with the lever up 30 degrees

    I believe that is all their steps, but might be slightly out of order. I always liked the Hope method though of pushing fluid down from the master cylinder, this is stupidly easy with the Shimano funnel.

  16. #15
    Grasshopper
    Join Date
    Oct 2007
    Posts
    28
    Rep Power
    4
    Kidwoo and others, thanks for the replies. Sucky to hear, but glad I'm not the only one that's experienced this. Too bad I paid a ton for two sets of brakes, but luckily Shimano is really good to deal with, so maybe I can get some XTR's Trails out of it or something. But I do worry about being 215 or so ready to ride on XTR's...

    And Kidwoo what you said also makes perfect sense why the newer set of XT's (785's or whatever) on my hardtail don't exhibit this behavior...

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •