Sram Drivetrain Thread

Discussion in 'Shop Talk' started by SnakeCharmer, Jul 13, 2019.



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  1. SnakeCharmer

    SnakeCharmer iMTB Hooligan

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Ssnake"
    Current Bike:
    Vassago/Trek
    Everything Sram, drivetrain related. All speeds.

    I'll start.

    Sram Eagle GX equipped:

    I am getting an noticeable clicking of the chain going over the some of cogs of the cassette and it seems like it's starting on more cogs with each ride recently. No shifting issues at all, smooth as silk. I tried doing some minor dial adjustments at the shifter but there was no improvement. It is quieted to a degree when the chain is freshly lubed, but not eliminated. I measured a few random sections of the chain and found zero stretch. I am suspicious about the Sram Eagle quick link, though. It measured a tiny bit longer than the chain links did, individually. These links are curved, unlike any other brand I have used. has anyone experienced stretch issues with them? I've been a KMC chain guy until 2019 started.
     
    Faust29, Danmtchl, Voodoo Tom and 4 others like this.
  2. mtnbikej

    mtnbikej J-Zilla

    Location:
    Orange
    Name:
    J M
    Current Bike:
    SC Chameleon SS, SC Hightower
    Check the B-Tension Gap.....make sure to set it with the rear suspension sagged to it's lowest spot.

    There is nothing wrong with the curved SRAM link. Make sure you have it oriented the correct way....the moon(concave) should be pointing towards the chainstay.
     
    Faust29, Danmtchl, Voodoo Tom and 5 others like this.
  3. SnakeCharmer

    SnakeCharmer iMTB Hooligan

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Ssnake"
    Current Bike:
    Vassago/Trek
    Thanks J.

    I am soaking the chain in solvent. Seemed awfully stiff for being just lubed.
     
    Faust29, Danmtchl, Voodoo Tom and 2 others like this.
  4. Cyclotourist

    Cyclotourist iMTB Hooligan

    Location:
    Redlands
    Name:
    David
    Current Bike:
    Tallboy Upgrade
    How do you fully sag the rear? Do you let all the pressure out of the shock?
     
    Faust29, Danmtchl, Voodoo Tom and 4 others like this.
  5. doublewide

    doublewide iMTB Rockstah

    Name:
    Mark
    Current Bike:
    Ride Life Ride Giant
    That works OR let a FATTY like me have a seat on your bike.
     
    stevers, ~JB~, Faust29 and 9 others like this.
  6. Cyclotourist

    Cyclotourist iMTB Hooligan

    Location:
    Redlands
    Name:
    David
    Current Bike:
    Tallboy Upgrade
    Everyone has a purpose!
     
  7. mtnbikej

    mtnbikej J-Zilla

    Location:
    Orange
    Name:
    J M
    Current Bike:
    SC Chameleon SS, SC Hightower
    Or remove the shock from one end and cycle the suspension until you find the spot where the chain growth is the most, and set it from there.

    Having the $5 plastic gap gauge makes it silly simple.
     
  8. SnakeCharmer

    SnakeCharmer iMTB Hooligan

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Ssnake"
    Current Bike:
    Vassago/Trek
    My chain still has some semi-stiff links after soaking for four hours. I rinsed off the chain, lightly brushed the remaining deposits. I renewed the degreaser and I will let it soak overnight.
     
  9. Voodoo Tom

    Voodoo Tom MTB Addict

    Location:
    Castaic
    Name:
    Tom Kokkinakis
    Current Bike:
    Mango one, blue one, black one
    One thing I know for sure is that my 12 speed Eagle xx1 derailleur is a stick magnet compared to any other drivetrain I've ridden. Way more frequent stops on our bushwacking adventures.
     
  10. SnakeCharmer

    SnakeCharmer iMTB Hooligan

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Ssnake"
    Current Bike:
    Vassago/Trek
    Yes, same with my GX RD and I think it's happened to @buggravy's X01 too, IIRC.
     
  11. Voodoo Tom

    Voodoo Tom MTB Addict

    Location:
    Castaic
    Name:
    Tom Kokkinakis
    Current Bike:
    Mango one, blue one, black one
    In addition to the Sram instructions here

    I thought this video did a better job of explaining
     
  12. buggravy

    buggravy Well-Known Member

    Location:
    Calabasas
    Name:
    Matt
    Current Bike:
    Guerrilla Gravity The Smash
    I’m removing junk on pretty much every ride, if not a couple times per ride. To be fair, the argument can also be made that I “color outside the lines” more than some.
     
    DangerDirtyD, Faust29, UPSed and 4 others like this.
  13. Danimal

    Danimal iMTB Rockstah

    Location:
    Mission Viejo
    Name:
    Dan
    Current Bike:
    GG Trail Pistol!
    I too have picked up a lot of crap in the SRAM drive train this year. Most likely there is just more trail side sticks then usual due to the excessive growth.
    But soon enough I'll have a "different brand" and will compare.
     
  14. SnakeCharmer

    SnakeCharmer iMTB Hooligan

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Ssnake"
    Current Bike:
    Vassago/Trek
    ROUND TWO:

    The chain continues to click loudly on two cogs and lightly on a few others of the cassette after a thorough degreasing and relube. I stopped to see where on the chain the clicking was occurring and it is in fact the Sram quicklink.

    I borrowed the Sram Eagle alignment tool from my LBS. lets see if a readjustment helps. If not, I will replace the quicklink.

    The drivetrain is approaching 1000 miles. Its got 800+ miles for sure.

    92CC144F-8EEC-4BE1-90C6-D963C2CB3D39.jpeg
     
  15. Cyclotourist

    Cyclotourist iMTB Hooligan

    Location:
    Redlands
    Name:
    David
    Current Bike:
    Tallboy Upgrade
    Maybe not for the borrowed one, but for anyone that has their own, I color in the limit line arc with a Sharpie. Lets you really see how close the cogs are to recommended distance.
     
    Danmtchl, Faust29 and Voodoo Tom like this.
  16. SnakeCharmer

    SnakeCharmer iMTB Hooligan

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Ssnake"
    Current Bike:
    Vassago/Trek
    Great idea! I ordered one for myself a few mins ago. I will do that to mine when it arrives. :cool:
     
    Danmtchl and Cyclotourist like this.
  17. UPSed

    UPSed iMTB Hooligan

    Location:
    Simi Valley
    Name:
    Ed Bottorff
    Current Bike:
    Niner Jet 9 RDO
    So far Jennifer's GX Eagle has not been too finicky as long as I keep it clean.
     
    Danmtchl and Voodoo Tom like this.
  18. mtnbikej

    mtnbikej J-Zilla

    Location:
    Orange
    Name:
    J M
    Current Bike:
    SC Chameleon SS, SC Hightower

    1000 miles is a lot of miles for a 12 spd drivetrain. I know my stock 12 spd SRAM chain went bad about 900 miles.

    Especially if you spend a lot of time in the 42/50t cogs.
     
    Danmtchl, Cyclotourist and UPSed like this.
  19. SnakeCharmer

    SnakeCharmer iMTB Hooligan

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Ssnake"
    Current Bike:
    Vassago/Trek
    Define "went bad".
     
    Danmtchl likes this.
  20. mtnbikej

    mtnbikej J-Zilla

    Location:
    Orange
    Name:
    J M
    Current Bike:
    SC Chameleon SS, SC Hightower
    Stretched beyond .75 on the chain checker. Knowing what that 1250 cassette costs, I stay on top of chain stretch.
     
  21. Rumpled

    Rumpled Well-Known Member

    Location:
    OC
    Name:
    Jim Martin
    Current Bike:
    2018 Specialized Epic Carbon C
    What's that for you? A week?
     
    Danmtchl, Grego, DangerDirtyD and 5 others like this.
  22. SnakeCharmer

    SnakeCharmer iMTB Hooligan

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Ssnake"
    Current Bike:
    Vassago/Trek
    Im not a super powerhouse rider. I have measured the chain on my rig twice in recent times. It may be a few millimeters stretched or less using the ruler method but I do need to get a chain stretch tool for my kit.

    I am however thinking that the cassette may be getting a lil tired since two of the chainrings are noisier than the rest.
     
    Danmtchl and Danimal like this.
  23. SnakeCharmer

    SnakeCharmer iMTB Hooligan

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Ssnake"
    Current Bike:
    Vassago/Trek
    Park Tools suggests that 11 & 12 speed chains be replaced at .5% stretch. :eek:
     
  24. mtnbikej

    mtnbikej J-Zilla

    Location:
    Orange
    Name:
    J M
    Current Bike:
    SC Chameleon SS, SC Hightower

    Not realistic....their own tool says new chains are .25-.5%
     
  25. UPSed

    UPSed iMTB Hooligan

    Location:
    Simi Valley
    Name:
    Ed Bottorff
    Current Bike:
    Niner Jet 9 RDO
    Yup. I used to swap out my chain every 6 months whether it needed it or not. Cheap insurance. Now that I ride a lot more miles I check it with a Park Tool chain checker. Again cheap insurance.
     
  26. SnakeCharmer

    SnakeCharmer iMTB Hooligan

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Ssnake"
    Current Bike:
    Vassago/Trek
    That's called "marketing". :rolleyes:

    It's like the fish food flakes commonly used for the hobbiest. The directions suggest 3 feedings per day but if you did that, you would run out of what should last for 4-5 months in about one month AND your aquarium would be filthy. But, there in lays some tie-in products.... With a dirty tank you will need to change water and replace the filter cartridges more often so that increases water conditioner and filter cartridge sales for the company manufacturing them.

    It's dirty little world we live in. :mad:
     
  27. SnakeCharmer

    SnakeCharmer iMTB Hooligan

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Ssnake"
    Current Bike:
    Vassago/Trek
    Installed new chain (Sram GX Eagle) the other day and rode yesterday. Noise 95% gone in all gears but one. That one, I will call it 85-90% gone, comparatively. That's likely the gear I use most on the cassette so it's worn more than the others. The other higher speed gear that was making as much noise with the stretched chain is silent now.
     
    Old&InTheWay, ~JB~, Danmtchl and 3 others like this.
  28. SnakeCharmer

    SnakeCharmer iMTB Hooligan

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Ssnake"
    Current Bike:
    Vassago/Trek
    Anyone know off the top of their head what the minimum thickness limit is for the latest/greatest Sram brake rotors?
     
  29. SnakeCharmer

    SnakeCharmer iMTB Hooligan

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Ssnake"
    Current Bike:
    Vassago/Trek
    Snake, I believe it's 1.5mm. :D
     
  30. herzalot

    herzalot iMTB Hooligan

    Location:
    Laguna Beach
    Name:
    Chris
    Current Bike:
    '20 Pivot Firebird 29
    I've seen people talk to themselves before, but this is next level! Well done. :thumbsup:
     
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