Advertise on Bikeforums.net



User Tag List

Results 1 to 7 of 7
  1. #1
    Mud scraper
    Join Date
    Jun 2009
    Location
    NJ
    My Bikes
    Specialized Sirrus
    Posts
    13
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Derailleur (noob) questions...

    Hey everyone..
    So I have an 07 Sirrus Sport. Came stock w/ a Shimano Sora rear derailleur and a Shimano (forget the model) front derailleur...

    My question is.. What are my options in terms of aftermarket or better ones to replace on this bike? I'm guessing that the stock parts are somewhat bottom shelf. Any suggestions?

    Also, what difference would I notice w/ upgraded derailleurs? Smoother, crisper shifting? Anything else? Would it also be a good idea to switch out the sprockets/cassettes/gears? I got the bike used for a great price and the previous owner said theres about 400 miles on it..

    Thanks in advance.. Please school me.
    **************
    2007 Specialized Sirrus Sport

  2. #2
    Keep on climbing
    Join Date
    Apr 2004
    Location
    Marlborough, Massachusetts
    My Bikes
    2004 Calfee Tetra Pro
    Posts
    2,074
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Cassettes will last a long, long time if you keep up with the chain maintenance. There is an excellent article here: http://www.sheldonbrown.com/chains.html.

    However, 400 miles is nothing. You should be able to get to 5 or 6 times that number before you have to start worrying about replacing the chain.

    As for the rear derailleur. Yes, Sora is near the bottom. However, it's currently 9-speed while everything 105 or above is 10-speed. Making the 9-to-10 speed upgrade involves replacing a bunch of parts. Sora derailleurs should shift just fine. Chain maintenance (regular replacement, along with keeping it clean and regularly lubed) plus proper cable tension has more to do how "crisply" your shifts will be occurring then anything else.
    "There is more to life than increasing its speed" -- Mahatma Gandhi

  3. #3
    rebmeM roineS JanMM's Avatar
    Join Date
    Jan 2006
    Location
    Indiana
    My Bikes
    RANS V3, RANS V-Rex, RANS Screamer
    Posts
    11,595
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by KevinF View Post
    Cassettes will last a long, long time if you keep up with the chain maintenance. There is an excellent article here: http://www.sheldonbrown.com/chains.html.

    However, 400 miles is nothing. You should be able to get to 5 or 6 times that number before you have to start worrying about replacing the chain.

    As for the rear derailleur. Yes, Sora is near the bottom. However, it's currently 9-speed while everything 105 or above is 10-speed. Making the 9-to-10 speed upgrade involves replacing a bunch of parts. Sora derailleurs should shift just fine. Chain maintenance (regular replacement, along with keeping it clean and regularly lubed) plus proper cable tension has more to do how "crisply" your shifts will be occurring then anything else.
    There is no lack of 9-speed gear available online or in stores.
    RANS V3 (steel), RANS V-Rex, RANS Screamer

  4. #4
    Older than dirt CCrew's Avatar
    Join Date
    May 2008
    Location
    Winchester, VA
    My Bikes
    Too darn many.. latest count is 11
    Posts
    5,345
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by JanMM View Post
    There is no lack of 9-speed gear available online or in stores.
    +1. Lots of it out there.

  5. #5
    Pat
    Pat is offline
    Senior Member
    Join Date
    Jan 2002
    Location
    Orlando, FL
    My Bikes
    litespeed, cannondale
    Posts
    2,795
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Well, I do not go out there and ride all the different stuff. But everything I have ever read says that even low end Shimano deraillers shift fine. A high end derailler might have a slightly "crisper" or "precise" feel but so what? The thing is components are often matched - frame, wheels, shifters, brakes are all at the same level. Upgrading one is not really going to help much. Upgrading everything will just get you replacing the whole bike piecemeal which is very expensive.

    I would suggest that you just ride what you have and after you put in the miles, get a new bike at a higher end and keep the old one as your "rainy day" or "beater" bike.

  6. #6
    Mud scraper
    Join Date
    Jun 2009
    Location
    NJ
    My Bikes
    Specialized Sirrus
    Posts
    13
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Hey all. Thanks for the info.. I spent a good portion of today watching YouTube vids and actually learned to tune and adjust the derailleurs myself. It is shifting MUCH better now! I think I'll be good for a while + gained some knowledge tinkering w/ the bike..

    Thanks!
    **************
    2007 Specialized Sirrus Sport

  7. #7
    Time for a change. stapfam's Avatar
    Join Date
    Jan 2004
    Location
    6 miles inland from the coast of Sussex, in the South East of England
    My Bikes
    Dale MT2000. Bianchi FS920 Kona Explosif. Giant TCR C. Boreas Ignis. Pinarello Fp Uno.
    Posts
    19,915
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Sora may be low end but it works fine. What might not be is length of life of it but the time to replace parts is when they wear out. Replace the rear derailler with any other you want as the R.D is not number of gear specific. May be some exceptions but a 10 speed shimano RD will replace any other shimano RD.

    Front Derailler though and you will have trouble wearing it out. And some of these are gear specific. Double or triple chainrings and width of chain affect these.
    How long was I in the army? Five foot seven.


    Spike Milligan

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •