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  1. #26
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    Quote Originally Posted by WR304 View Post
    I hope my 2012 Specialized Epic Expert 29er's Rock Shox Sid brain fork is going to be reliable. Threads like this one make me wonder whether it was a good decision to get another brain fork though. My bike arrived at the shop today but hasn't been built up yet.

    After the multiple failures of my 2009 Specialized Futureshock E100 fork I really didn't want another brain fork. I couldn't get just a frame though so I'm going to give it a try initially. If the 2012 brain fork does fail I'm going to replace the cartridge with a standard Rock Shox damper, rather than go through the never ending cycle of warranty repair / failure / warranty repair / failure etc that the E100 fork ended up in.

    Welcome to the Epic 29er club WR304, you took the plunge then. I still think these Rockshox SID brain forks are the best I've ever ridden and mine have been very reliable and consistent so far and I've ridden them in all conditions. Like the FOX but even smoother and full travel achieved, hope you find them the same. There is no doubt you'll love the bike.

  2. #27
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    Quote Originally Posted by Pete N View Post
    Welcome to the Epic 29er club WR304, you took the plunge then. I still think these Rockshox SID brain forks are the best I've ever ridden and mine have been very reliable and consistent so far and I've ridden them in all conditions. Like the FOX but even smoother and full travel achieved, hope you find them the same. There is no doubt you'll love the bike.
    Wheelbuilder.com released a 142x12mm Powertap axle conversion kit which got rid of the main sticking point. It means that I can use my existing Powertap hub with the 2012 Epic frame. With the power meter sorted out everything else falls into place neatly. I can fit my 44/33/23 triple chainset with Rotor Q-rings, instead of needing an expensive Quarq Quattro double chainset that only has the option of 39/26 chainrings. It didn't make much sense having a bike equipped with 2x10 gearing that would be too high for me to ride up some of the local climbs on.

    Wheelbuilder PowerTap MTB 142mm x 12mm Axle Conversion

    In terms of the fork the main thing I'm planning to do is convert the Roval front hub by drilling out the end caps so that it takes a 9mm DT RWS skewer. The combination of 9mm DT RWS skewer and 28mm endcaps worked well on my 2009 Epic, being as stiff or stiffer than a Fox F100 Terralogic fork with 15QR axle (I couldn't notice a difference between them).

    The rest of the bike is going to be mostly parts carried over from my current bike. XTR brakes, SRAM X-0 drivetrain etc.

  3. #28
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    I went past the bike shop on the way home today and had a look at my new bike. It's sitting in the workshop waiting until the parts from my current bike are swapped over.

    The fork's brain seemed ok but the brain rear shock on this brand new 2012 Epic 29er was faulty and not locking out properly. It had a big gap and notch at the beginning of the travel, when the brain was set to full firm. First failure before it's even been ridden.

    On the plus side I'm not in much of a hurry for it. At least I can ride my current bike whilst this one stays at the shop until the faulty shock is replaced.

    Edit: The rear shock wasn't faulty. See Post #34.

    Looking over the bike I didn't like the feel of the stock Formula "R1 S" brake levers much. They seemed to have a fairly heavy lever feel (more like pulling a cable v brake than a hydraulic disc brake) and the lever blades didn't feel very natural. New style Shimano brake levers feel much nicer.
    Last edited by WR304; 01-23-2012 at 02:57 PM.

  4. #29
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    Quote Originally Posted by WR304 View Post
    I went past the bike shop on the way home today and had a look at my new bike. It's sitting in the workshop waiting until the parts from my current bike are swapped over.

    The fork's brain seemed ok but the brain rear shock on this brand new 2012 Epic 29er was faulty and not locking out properly. It had a big gap and notch at the beginning of the travel, when the brain was set to full firm. First failure before it's even been ridden.

    On the plus side I'm not in much of a hurry for it. At least I can ride my current bike whilst this one stays at the shop until the faulty shock is replaced.

    Looking over the bike I didn't like the feel of the stock Formula "R1 S" brake levers much. They seemed to have a fairly heavy lever feel (more like pulling a cable v brake than a hydraulic disc brake) and the lever blades didn't feel very natural. New style Shimano brake levers feel much nicer.
    I can tell you that the 2012 tune is completely different from the 2011, my 2012 SWorks epic rear shock even at full firm setting still bobs. It this new small bump compliance tune for 2012, honestly the more I ride my bike the more I hate it.

  5. #30
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    Quote Originally Posted by EpicFSR View Post
    I can tell you that the 2012 tune is completely different from the 2011, my 2012 SWorks epic rear shock even at full firm setting still bobs. It this new small bump compliance tune for 2012, honestly the more I ride my bike the more I hate it.
    The rear shock on my new bike didn't seem right at all. You could push down on the saddle and feel a distinct notch as the shock started moving, along with over 1 cm of relatively free travel before the brain platform appeared to apply. With previous Epic brain shocks a notch in the travel is usually a sign of an internal leak somewhere.

    The shop has another 2012 Epic 29er upstairs in the showroom. I'll have to go in tomorrow and have a look at how the brain shock on that bike functions. I'll be very worried if it's normal for a 2012 Epic 29er rear shock to behave like this one though.

    Edit: The rear shock wasn't faulty. See Post #34.
    Last edited by WR304; 01-23-2012 at 02:58 PM.

  6. #31
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    Quote Originally Posted by WR304 View Post
    The rear shock on my new bike didn't seem right at all. You could push down on the saddle and feel a distinct notch as the shock started moving, along with over 1 cm of relatively free travel before the brain platform appeared to apply.
    Interesting. I noticed that the shock still sags on my 2012 Epic no matter what the brain setting. I set the shock to sag 12mm fully open, and it sags at about 12mm on all six settings. That being said, the 6 clicks of 6 setting feels for all the world like a full lockout riding the bike, it's only looking at the o-ring that I see it sagged in. I'm wondering if it is by design to maintain correct geometry or balance? Just speculating.

    The SID fork on full lock has a few mm of give, and that's it. The brain blow-off works nice, but I'm thinking about lobotomizing the fork and swapping the brain for an RCT3 cartridge. I guess I've never understood the appeal of a locked out fork. Even fully open, it still hesitates to compress for a split second. Feels like stiction would on a regular fork, which doesn't translate into acceptable performance for me.

  7. #32
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    UPDATE:
    my fork is for sure a warranty. No variation in tuning when dialing the dampener. Spec. rep didnt even ask questions... told him it was bad, he said another cartridge was on the way. This is obviously getting common, based on the write-ups here and the reps reaction.
    I should note mine is a 2011 expert carbon. So, based on what I am reading here I am glad I dont have the 2012 rear shock.
    It will be fixed middle of next week. And spec. turn around is like 2-3 days right now. If you get on it before the season picks up they should have decent turn around.

  8. #33
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    WR304. The 2012 tune for me is much better than the 2011. Still firm( and yes your shock does sound faulty, as long as it has some air in it). My 2012 has the firm platform when set with full brain, the pushing down on the saddle test it remains solid, with a couple of mm of travel at most, just like the 2011.
    The difference is that it takes less of a bump to active it but it remains firm on the smooth. When pedalling you get a a few mil of movement on the shock, again like the 2011 as it marginally moves out of and back into the sag.
    When going through the brain threshold the feeling is less than the 2011, which gives a smoother feeling, but you can still just about feel it when at the firmer end if the brain.
    I hate bob when pedalling and to tell you I set it three clicks from firm should tell you all you need to know, I don't feel the need to run full firm.
    My Forks and shock have been faultless, so good luck with yours.

  9. #34
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    Quote Originally Posted by WR304 View Post
    The rear shock on my new bike didn't seem right at all. You could push down on the saddle and feel a distinct notch as the shock started moving, along with over 1 cm of relatively free travel before the brain platform appeared to apply. With previous Epic brain shocks a notch in the travel is usually a sign of an internal leak somewhere.

    The shop has another 2012 Epic 29er upstairs in the showroom. I'll have to go in tomorrow and have a look at how the brain shock on that bike functions. I'll be very worried if it's normal for a 2012 Epic 29er rear shock to behave like this one though.
    I had another look at the shock today. The 2012 Epic is a brand new bike that's never been ridden. I let all the air out, cycled the shock and turned the brain dial a few times before re-inflating the shock. This time when I tested it the rear shock was working properly. Full firm brain setting and platform adjustments on the rear shock were fine. Full firm platform on the 2012 shock when pushing down on the saddle being very close to the feel of the full firm brain platform on my 2010 Epic that I'd ridden over to the shop on. No notch or free play.

    What I think had happened was that because the shock was brand new the oil inside the brain might not have been in the correct place initially (in the same way as after you service a fork the oil has to settle back through the cartridge before the fork's damping works normally). It looks like the shock is now working normally.

  10. #35
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    Since I got my 2012 epic Sworks I haven't been able to get the sid world cup dialed. After reading these threads I see there's some issues with this fork. Blown air cartridge on mine. Not sure if there's something wrong with the brain side as well, but it's being sent back to Sram.

  11. #36
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    Quote Originally Posted by cyclingmagnet View Post
    Since I got my 2012 epic Sworks I haven't been able to get the sid world cup dialed. After reading these threads I see there's some issues with this fork. Blown air cartridge on mine. Not sure if there's something wrong with the brain side as well, but it's being sent back to Sram.
    I've just re-read the posts as well. I would like to make a few points:
    1) When people are talking about oil in the fork, there are 2 types of oil: the "bath oil" for each fork leg that lubricates the sliders and dual air spring, and the damper and brain cartridge oil which is separately contained in these mechanisms.
    2) There is no "fill" for these units, they are completely full of oil, and should have no air in them whatsoever. Any leak of oil in the damper & brain cartridges (past their O-ring oil seals) will impair the operation of the fork. "Fill" is determined by the length of units which are prescribed +/1 1mm.
    3) The proper oil bath fill for both legs of a 29er Brain fork is 10cc of 10wt oil.

    The standard 150hr service for the Brain fork involves the removal of all oil seals, the fitting of a new IFP piston slider and replacement of the oil in the damper & brain cartridges. Specialized sell a 150hr kit which includes the IFP and 9 O-ring seals, a crush washer, a shaft seal, and a nitrogen pellet.

  12. #37
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    Quote Originally Posted by skiwi View Post
    I've just re-read the posts as well. I would like to make a few points:
    1) When people are talking about oil in the fork, there are 2 types of oil: the "bath oil" for each fork leg that lubricates the sliders and dual air spring, and the damper and brain cartridge oil which is separately contained in these mechanisms.
    2) There is no "fill" for these units, they are completely full of oil, and should have no air in them whatsoever. Any leak of oil in the damper & brain cartridges (past their O-ring oil seals) will impair the operation of the fork. "Fill" is determined by the length of units which are prescribed +/1 1mm.
    3) The proper oil bath fill for both legs of a 29er Brain fork is 10cc of 10wt oil.

    The standard 150hr service for the Brain fork involves the removal of all oil seals, the fitting of a new IFP piston slider and replacement of the oil in the damper & brain cartridges. Specialized sell a 150hr kit which includes the IFP and 9 O-ring seals, a crush washer, a shaft seal, and a nitrogen pellet.
    Thats interesting because Im about to do a damper service on my 2012 SWepic Brain fork and was reading over the tech manuals. The SID 100 fork section on SRAMs website staes 98ml of 5 weight oil, so should be filling it right up.?

    Also has anyone noticed while riding over roots/rocks with the brain on 1 click out from full firm a slight air leak sound from the front fork.? It will only happen when the setting is 1 from full firm, its basically when the brain is activated, I can also make it happen with riding at a very slow speed and pushing down hard on the front fork.

  13. #38
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    Quote Originally Posted by PAmtbiker View Post
    My 2011 RS Brain will soon be off to the big S for a Brain transplant. They are putting in the 2012 damper cartridge with the top mounted adjuster. We'll see if the oil level comes back low after the break-in period. I'll report back in a few weeks when the fork comes back.
    Just wanted to follow up and find out how this Brain transplant went? I also have the 2011 RS Brain Fork with compression adjuster on the bottom and would really like to have access to it on the top of fork or at least the ability to Remote adjust it.

  14. #39
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    Quote Originally Posted by EpicFSR View Post
    Thats interesting because Im about to do a damper service on my 2012 SWepic Brain fork and was reading over the tech manuals. The SID 100 fork section on SRAMs website staes 98ml of 5 weight oil, so should be filling it right up.?

    Also has anyone noticed while riding over roots/rocks with the brain on 1 click out from full firm a slight air leak sound from the front fork.? It will only happen when the setting is 1 from full firm, its basically when the brain is activated, I can also make it happen with riding at a very slow speed and pushing down hard on the front fork.
    Have you checked out the Spec video for the 150hr service?

  15. #40
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    Quote Originally Posted by skiwi View Post
    Have you checked out the Spec video for the 150hr service?
    No I didnt even know there was one... Link?

  16. #41
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    Quote Originally Posted by EpicFSR View Post
    No I didnt even know there was one... Link?
    video goodness here

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