1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

mountain bike question

Discussion in 'Sports, Hobbies & Interests' started by SR54x4, Jun 12, 2011.

  1. Jun 12, 2011 at 7:47 AM
    #1
    SR54x4

    SR54x4 [OP] Well-Known Member

    Joined:
    May 23, 2010
    Member:
    #37658
    Messages:
    695
    Gender:
    Male
    First Name:
    Mark
    Hudson Valley
    Vehicle:
    2008 4x4 TRD SR5 Tundra
    Magnaflow 12588, TSC lo-pro extra deep toolbox, step bars and bull bar
    i ride a cannondale prophet and recently when climbing hills the chain keeps jumping out of gear then back to the gear i have selected. its a real pita. it seems to be jumping from the back cassette, mostly on the larger rings. i also find it really happens when climbing hills and even more when im standing and climbing. the teeth on my cassette are definatley worn, but not down to nothing yet. do i need a new cassette, or is something out of adjustment?
     
  2. Jun 12, 2011 at 7:52 AM
    #2
    6spdtaco

    6spdtaco Well-Known Member

    Joined:
    Mar 6, 2010
    Member:
    #32654
    Messages:
    596
    Gender:
    Male
    First Name:
    Nate
    East Wallingford, VT
    Vehicle:
    Taco
    Tom Woods driveshaft. TRD short throw shift kit. TRD exhaust. AFE Stage II intake. CBI Bumpers front and rear. Warn 8000i winch/ synthetic line. OME 3" lift w/ dakar springs and 886 coils. ATO Front skid. ARE MX cap. Trail Team FJ wheels. Cooper Discoverer ST 265/75-16 C tires. Diff breather relocation mod.
    sounds like your drivetrain is worn out. Go to a shop and ask them to check your chain wear. If it is past 1.0 you are in trouble. That means you need to replace the chain, cassette, and most likely some or all of your front chainrings.
     
  3. Jun 12, 2011 at 7:54 AM
    #3
    SR54x4

    SR54x4 [OP] Well-Known Member

    Joined:
    May 23, 2010
    Member:
    #37658
    Messages:
    695
    Gender:
    Male
    First Name:
    Mark
    Hudson Valley
    Vehicle:
    2008 4x4 TRD SR5 Tundra
    Magnaflow 12588, TSC lo-pro extra deep toolbox, step bars and bull bar
    im really hoping its just the cassette, i figured i would ask hear to brace myself for damage when i bring it to the bike shop this week.
     
  4. Jun 12, 2011 at 7:56 AM
    #4
    6spdtaco

    6spdtaco Well-Known Member

    Joined:
    Mar 6, 2010
    Member:
    #32654
    Messages:
    596
    Gender:
    Male
    First Name:
    Nate
    East Wallingford, VT
    Vehicle:
    Taco
    Tom Woods driveshaft. TRD short throw shift kit. TRD exhaust. AFE Stage II intake. CBI Bumpers front and rear. Warn 8000i winch/ synthetic line. OME 3" lift w/ dakar springs and 886 coils. ATO Front skid. ARE MX cap. Trail Team FJ wheels. Cooper Discoverer ST 265/75-16 C tires. Diff breather relocation mod.
    if they end up concluding that your drivetrain is effed, you can try to save some cash by just replacing the chain and cassette. Ride it with the original rings for a while and see if it slips off the front.
     
  5. Jun 12, 2011 at 8:42 AM
    #5
    SR54x4

    SR54x4 [OP] Well-Known Member

    Joined:
    May 23, 2010
    Member:
    #37658
    Messages:
    695
    Gender:
    Male
    First Name:
    Mark
    Hudson Valley
    Vehicle:
    2008 4x4 TRD SR5 Tundra
    Magnaflow 12588, TSC lo-pro extra deep toolbox, step bars and bull bar
    yea i think i might just try that. the chain is like new, and the front rings dont ever seem to slip. maybe ill just start with a new cassette (looks like a decent one runs about $50) and go from there.
     
  6. Jun 12, 2011 at 8:53 AM
    #6
    T@co_Pr3runn3r

    T@co_Pr3runn3r XXXXXXXXXXXXXXXXXXX

    Joined:
    Jan 20, 2009
    Member:
    #12767
    Messages:
    10,363
    Gender:
    Male
    <----------------->
    Vehicle:
    08 RC Prerunner SR5
    Sounds like cassette/chain mismatch or wear or torque issue when standing climbing tweaking chain line. I had an old Diamondback FS bike that would do that when torqued up climbing....or cable stretch and the adjuster on the rr derailleur just needs a twist or 2
     
  7. Jun 12, 2011 at 8:57 AM
    #7
    tonyplanet

    tonyplanet Well-Known Member

    Joined:
    Feb 28, 2009
    Member:
    #14187
    Messages:
    206
    Gender:
    Male
    Pomona, CA
    Vehicle:
    09 Tacoma 4x4 TRD Off-Road
    enough to get me there
    It's more than likely your cassette. With the tight spacing these days, 9spd and now mountian bikes are moving towards 10spd, things become more finicky.

    I just finished replacing my own cassette. Cassette and chains are the most wear items on your drivetrain. Your cassette will last longer if you maitain your drive chain and keep it clean i.e. replace chains when they need to be replaced, and lube.
     
  8. Jun 12, 2011 at 8:58 AM
    #8
    especk

    especk Nothin' Special

    Joined:
    Aug 21, 2010
    Member:
    #42041
    Messages:
    2,453
    Gender:
    Male
    First Name:
    Erik
    Redding, CA
    Vehicle:
    2010 Tacoma Reg Cab 4x4
    3" OME lift with 885 coils on nitrocharger 90000 shocks with 5mm trim packer on driver's side, TC UCAs, Rear OME Dakar leafs with nitrocharger shocks, All-pro U-bolt flip kit and 3* Toytec shims, extended rear brakelines, 16" Raceline Rockcrusher 887 wheels with 3.6" backspacking, BFG KM2 305/70/16 tires, Doug Thorley header, Doug Thorley catback exhaust, Volant CAI with ram air, Weathertech floor mats, Kicker 12" sub, Kenwood 500W RMS amp, Relentless Fab front and rear bumpers, 4.88 gears, custom flatbed with swing out tire carrier
    it sounds to me like its the rear derailer. it will do exactly what you are talking about if the adjustment cable is to loose. after a while that cable stretches. It can be tightened by turning the adjustment where the cable goes into the derailer (usually in a clockwise direction)
     
  9. Jun 12, 2011 at 9:09 AM
    #9
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

    Joined:
    May 8, 2008
    Member:
    #6497
    Messages:
    103,961
    Gender:
    Male
    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, and lots of buttons.
    I agree. I would check the Rear Derailer adjustment first....and possibly the shifters. Then maybe the condition of the chain.
     
  10. Jun 12, 2011 at 9:12 AM
    #10
    DWreck

    DWreck Famous Fabrication Vendor

    Joined:
    May 18, 2010
    Member:
    #37368
    Messages:
    5,126
    Gender:
    Male
    First Name:
    Derek
    Las Vegas, NV
    Vehicle:
    2010 TRD Off Road 4x4
    Debadged, k&n cai, tc uca, billy 5100, led hood lights, redline hood struts, tailgate ez-down, ddm hid heads, Piaa 510 hid fogs, procomp 7089, dunlop fierce mt, cb and ham radios, hideaway strobes, ff front bumper, ff sliders, bed rack,
    Are you using correct rear sprocket to correct front? I.e. 1 in front and 1-4 in back, 2 in front and 3-6 in back, etch. Keeping chain straight as possible!
     
  11. Jun 12, 2011 at 9:13 AM
    #11
    fatty ac1d

    fatty ac1d Well-Known Member

    Joined:
    Nov 3, 2009
    Member:
    #25387
    Messages:
    215
    Gender:
    Male
    First Name:
    Ryan
    Liberal, Kansas
    Vehicle:
    15 MGM DCSB SR5
  12. Jun 12, 2011 at 9:48 AM
    #12
    babytruck

    babytruck Babytruck, babytruck...I've got a babytruck :)

    Joined:
    May 17, 2011
    Member:
    #56797
    Messages:
    9,005
    Gender:
    Female
    NorCal
    Vehicle:
    2010 Barcelona AC 4x4 4.0 6spd
    It sounds like it's ramping. With teeth worn, they definitely will slip down. upon torque, especially when doing climbs. If it weren't doing it under load, then I would say it's a der adjustment. Most likely a combination of both due to the stresses.

    But if the teeth are worn that really should be replaced, regardless.

    I would say a new cassette would benefit you the most at this point.
     
To Top