Mtbr's 2016 Winter Biking GearReviews and Roundups

FAT BIKES

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  1. #1
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    Rockshox Reverb Cold Weather Issues

    I have an annoying problem with my reverb.

    Basically, my reverb stealth stops extending when the weather gets to below a "brisk" 65F. I ride in Southern California primarily, so cold weather is really a non-issue, but 65F isn't considered cold in my book.

    I have bled the line, made sure the air pressure is max, slick honeyed the post, but nothing seems to help it much. In general, the post is sluggish, and I think it's time for a rebuild, but I want to make sure that's the issue before I drop time and money on rebuilding it.

    Anyone else have this issue and have suggestions? BTW, I did a search on this topic and really could not find anything directly related though there seems to be a few with cold weather issues.

  2. #2
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    My non-stealth Reverb works fine at temperatures below freezing here in CT. I don't, but the post does!

  3. #3
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    have you asked RS? id email and just see what they say

  4. #4
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    hmm stops extending? like won't go up at all?

    I had to warranty my first 2 reverbs and number 3 is getting installed, should have it back tomorrow. Mine have always worked but develop a sag at the top. We think this is due to air infiltrating into the oil chamber or vice versa.
    '15 Transition Smuggler

  5. #5
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    It doesn't go up at all when it's "cold" outside. When it warms past 70F or so (i have a thermometer on my bike), it works though not as fast as when I first got it. I am going to contact my LBS and see what they say as well. If it's a rebuild, I will do that myself as I don't want wait too long.

  6. #6
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    My reverb works great into the low 20's, which is as cold as I'm willing to ride. Bought it in June, 2012. I hear some have issues with their dropper posts, but I've had nothing but good results with mine.

  7. #7
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    Bringing it in to the the lbs tomorrow. Good thing is it's under warranty.

    It's extending now in the 75f degree. With weight on it, sags about 10mm too at full extension.

  8. #8
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    Is it middle aged?

    Maybe needs Viagra?
    My dog can eat a whole watermelon

  9. #9
    Trail Ninja
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    Quote Originally Posted by jcmonty View Post
    I have an annoying problem with my reverb.

    Basically, my reverb stealth stops extending when the weather gets to below a "brisk" 65F. I ride in Southern California primarily, so cold weather is really a non-issue, but 65F isn't considered cold in my book.

    I have bled the line, made sure the air pressure is max, slick honeyed the post, but nothing seems to help it much. In general, the post is sluggish, and I think it's time for a rebuild, but I want to make sure that's the issue before I drop time and money on rebuilding it.

    Anyone else have this issue and have suggestions? BTW, I did a search on this topic and really could not find anything directly related though there seems to be a few with cold weather issues.
    Thought it was normal. Also from SoCal. Last time I rode Strawberry Peak->Gabrielino, parking at Switzer, I found that the Reverb didn't work for a good 20 minutes after we got out of the shade. Was in an alloy frame, hanging off the back of the car for about an hour in the early morning. Was cold enough to me that I was doing push-ups in the parking lot to keep warm while waiting for all to get ready.

  10. #10
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    Quote Originally Posted by Cornbread1 View Post
    Is it middle aged?

    Maybe needs Viagra?
    Haha maybe for the lifespan of a bike!

    I don't think it should be normal, maybe if I was riding below freezing. But 65f? Something is up. It's been slowly degrading in terms of speed as well. Will keep everyone posted as to what happens.

    Stealth version btw

  11. #11
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    Quote Originally Posted by jcmonty View Post
    Bringing it in to the the lbs tomorrow. Good thing is it's under warranty.

    It's extending now in the 75f degree. With weight on it, sags about 10mm too at full extension.
    definitely have them warranty it, not supposed to sag at the top for sure. the information he got back from his rep said that they "had some bad batches" and they wanted him to send mine back to help them identify them.
    '15 Transition Smuggler

  12. #12
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    As the temps went down lately, I started to have issues with my Reverb Stealth. Noticed on Sunday when riding in 10C/50F weather it was really sluggish, but still functional even though sometimes barely creeping up to the extended position.

    Went for a quick night ride last night, with temp at about 5C/40F at the start of the ride and 0C/40F by the end of the ride. Also bike was on my bike rack for about 10 min hwy drive to the trail so everything was really cold. Dropped the post half way on the first downhill section and that was the end of it for the night. Did not sag any more, but would not extend. After the ride I brought the bike inside and let it warm up for an hour to room temp and it works again extending without issue at full speed.

    Post was rebuild by lbs this spring. Has very minimal side to side play that is not noticeable at all while riding. Otherwise solid.

    Time for Gravity Dropper...
    2014 Giant Trance 27.5 3
    2014 On One Fatty

  13. #13
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    Quote Originally Posted by kryten View Post
    As the temps went down lately, I started to have issues with my Reverb Stealth. Noticed on Sunday when riding in 10C/50F weather it was really sluggish, but still functional even though sometimes barely creeping up to the extended position.

    Went for a quick night ride last night, with temp at about 5C/40F at the start of the ride and 0C/40F by the end of the ride. Also bike was on my bike rack for about 10 min hwy drive to the trail so everything was really cold. Dropped the post half way on the first downhill section and that was the end of it for the night. Did not sag any more, but would not extend. After the ride I brought the bike inside and let it warm up for an hour to room temp and it works again extending without issue at full speed.

    Post was rebuild by lbs this spring. Has very minimal side to side play that is not noticeable at all while riding. Otherwise solid.

    Time for Gravity Dropper...
    did you check the air pressure in it? it's under the seat and air is definitely affected by changes in temperature.
    '15 Transition Smuggler

  14. #14
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    Quote Originally Posted by mtbiker040 View Post
    did you check the air pressure in it? it's under the seat and air is definitely affected by changes in temperature.
    Thanks, thats a good point about the pressure and temperature change.

    Was actually still planning to do that today after work as I didn't feel like messing with that thing last night anymore. Inflate to 250psi while fully extended or doesn't matter?
    2014 Giant Trance 27.5 3
    2014 On One Fatty

  15. #15
    I Tried Them ALL... Moderator
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    My bike was exclusively all-SRAM. With the exception of brakes(XTR M-988), 1x11 chaniring(Absolute Black 32t Oval) and dropper(KS LEV DX). After two Reverbs that did not like cold or extreme heat....
    "Don't swallow anything Satan rams down your throat.....Jesus comes first, always" - Pastor Joel Osteen

  16. #16
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    Quote Originally Posted by kryten View Post
    Thanks, thats a good point about the pressure and temperature change.

    Was actually still planning to do that today after work as I didn't feel like messing with that thing last night anymore. Inflate to 250psi while fully extended or doesn't matter?
    250lbs is definitely right but I don't think it would matter, I would do it extended imo
    '15 Transition Smuggler

  17. #17
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    Alright, thanks. Will try that after work.
    2014 Giant Trance 27.5 3
    2014 On One Fatty

  18. #18
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    Same issue with my 3 month old Reverb. Temps below ~65F and it locks up. Damned annoying. Caused a crash in a little transition zone and I scuffed my Enve bar.

    My 2012 Reverb Stealth has been flawless.

    Will be pursuing a fix or warranty this week but it's good to hear (I guess) about another having the same problem.

  19. #19
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    So the lbs did another bleed and the post is a lot more responsive. I haven't had too much cold weather being in San Diego but at 60f works like a charm, I am worried it's only a temporary fix as I bled it a month or so ago as well and it got progressively worse. The other issue of the post descending 10 to 15mm when weighted wS not fixed. I am going to ride it a bit before taking it back

  20. #20
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    I usually ride in Brazil, but last month I came to Germany to work, and during weekends do some mountain bike riding. Unfortunately, I had exactly the same problem as described, the Reverb Stealth stopped to work when temperature was bellow 8oC (48oF).
    I bleed the circuit, and still the same problem.
    Did you succeed with increasing the air pressure ?

  21. #21
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    Quote Originally Posted by Slepetys View Post
    I usually ride in Brazil, but last month I came to Germany to work, and during weekends do some mountain bike riding. Unfortunately, I had exactly the same problem as described, the Reverb Stealth stopped to work when temperature was bellow 8oC (48oF).
    I bleed the circuit, and still the same problem.
    Did you succeed with increasing the air pressure ?
    The bleed helped the action a bit, but it did not solve the problem. Just left my bike outside and it got down to 42f. The post is stuck and will not retract or extend at the moment

    I also have about 10 to 15mm in play right now. It's going to be warrentied shortly

  22. #22
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    Solved

    !=========== SOLVED ============!
    After some procedures, I got it working again, including in cold weather (bellow 8oC).

    Steps done:
    1. After unmounted the seat, I found the pressure valve.
    2. I released completely the pressure.
    3. Did another bleed, but this time with 3/4 full syringe in one side and 1/2 in the another side (without the pressure in the Reverb).
    4. After moving the fluid from one syringe to another through the tube, re-inflated the Reverb until 260 psi (recommended 250 psi).
    5. Moved the fluid several times from one syringe to another, with the valve for the fluid fully opened.
    6. A trick thing: Push and release several times the drop seat control. Until no more bubbles escape into the syringes.
    7. First restored the Reverb screw, allowing a little bit of oil to keeping the front (control syringe) in a lower level.
    8. Restored the second screw very carefully, assuring the control was in the released position.
    9. Done !

    Tested after 2 hours under 5oC. And still operating very well, without any change to the expected behavior.
    Last edited by Slepetys; 11-30-2015 at 04:42 PM. Reason: Correction

  23. #23
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    I guess I'll give this a shot - my wife's Reverb will not extend in temperatures under 30, which is about 2-3 months worth of our riding season here in PA.

    Bled it, and it improved. Perhaps I should bleed it again and do whatever you did with the air valves...

    Anyone else figure out a solution to Reverb's cold weather issues?

    FWIW - My reverb works fine. And it worked fine all last winter, down to 0 degrees F. (Knocking on wood) The funny this is, hers worked fine last year too....

    Quote Originally Posted by Slepetys View Post
    !=========== SOLVED ============!
    After some procedures, I got it working again, including in cold weather (bellow 8oC).

    Steps done:
    1. After unmounted the seat, I found the pressure valve.
    2. I released completely the pressure.
    3. Did another bleed, but this time with 3/4 full syringe in one side and 1/2 in the another side (without the pressure in the Reverb).
    4. After moving the fluid from one syringe to another through the tube, re-inflated the Reverb until 260 psi (recommended 250 psi).
    5. Moved the fluid several times from one syringe to another, with the valve for the fluid fully opened.
    6. A trick thing: Push and release several times the drop seat control. Until no more bubbles escape into the syringes.
    7. First restored the Reverb screw, allowing a little bit of oil to keeping the front (control syringe) in a lower level.
    8. Restored the second screw very carefully, assuring the control was in the released position.
    9. Done !

    Tested after 2 hours under 5oC. And still operating very well, without any change to the expected behavior.

  24. #24
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    While I bleed helped, my issue seemed to get worse to a point where a bleed did not improve the situation once. The bike is currently in the shop looking at getting new seals. I am hoping that solves the issue. My post also would sag about 10-15mm when it was working, which is not supposed to happen

  25. #25
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    Had my Reverb out yesterday in temps ~37F/3C worked fine for 3hrs and bike was on car for 1hr drive to trail. I haven't used it below freezing for any length of time yet.
    Safe riding,

    Vik
    www.vikapproved.com

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