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Bike Noob: Need Help with Drive Train Rebuild

Discussion in 'Sports, Hobbies & Interests' started by medusa1066, Jul 20, 2012.

  1. Jul 20, 2012 at 12:09 PM
    #1
    medusa1066

    medusa1066 [OP] Well-Known Member

    Joined:
    Oct 19, 2011
    Member:
    #65457
    Messages:
    189
    Gender:
    Male
    First Name:
    Jonathan
    Morgantown, WV
    Vehicle:
    2007 4x4 TRD Sport
    I have what I believe to be a 1991 Specialized Rockhopper that I bought at a local non-profit. The chainrings are rusty and missing a few teeth, and the rear cassette is very worn. I would like to remove/replace the cassette, chainrings, and chain. It currently has a Biopace chainring, everthing looks original except the shop replaced some of the rear sprockets individually. I found some info from another site http://www.anthonyalsberg.com/bike_spec/92_93/rock_fs.html:
    Drivetrain:
    Derailleurs -- Shimano STX Special Edition, Grip Shift SRT 500 R shifters
    Chain -- Shimano Hyperglide
    Crankset -- Shimano STX Special Edition, Shimano Hyperdrive C rings, 175 mm crankarms
    Bottom bracket -- Shimano Cartridge
    Freewheel -- Shimano 7-speed cassette

    Where do I start? Count all teeth on rear cassette, count all chainring teeth, and order matching HG parts? 7 speed Shimano hyperglide chain?

    I would go to a bike dedicated forum, but that is no fun :D. Thanks!
     
  2. Jul 20, 2012 at 1:43 PM
    #2
    pistobro206

    pistobro206 Member

    Joined:
    Apr 1, 2012
    Member:
    #76075
    Messages:
    10
    Gender:
    Male
    First Name:
    Albert
    Seattle WA
    Vehicle:
    11 TRD 4x4
    Does it shift through all the gears?

    I'd start with general cleaning and then assess what needs to replaced. No need to replacing anything if it works and just needs to be cleaned. Usually replacing the chain and cassette or freewheel is in order for a worn out drive train.
     
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