Adjusting Bullit Geometry

Discussion in 'Downhill & Freeride' started by PatBranch, Jan 5, 2008.

  1. PatBranch

    PatBranch Turbo Monkey

    Rep/Likes:
    8 / 7
    Joined:
    Sep 24, 2004
    Messages:
    10,461
    Location:
    wine country
    How could I slacken/lower it a bit with the stock size shock (8.5x2.5)? Would I have to get a custom shuttle? I'd like to have two setups: stock, and slacker and lower, using one shock.
     
    #1 -   Jan 5, 2008

    Please register to disable this ad.

  2. PatBranch

    PatBranch Turbo Monkey

    Rep/Likes:
    8 / 7
    Joined:
    Sep 24, 2004
    Messages:
    10,461
    Location:
    wine country
    bump.
     
    #2 -   Jan 6, 2008
  3. ChrisRobin

    ChrisRobin Turbo Monkey

    Rep/Likes:
    5 / 45
    Joined:
    Jan 30, 2002
    Messages:
    2,928
    Location:
    Vancouver
    Do you have one of those new Bullits or the old?
     
    #3 -   Jan 6, 2008
  4. DirtyMike

    DirtyMike Turbo Fluffer

    Rep/Likes:
    54 / 635
    Joined:
    Aug 8, 2005
    Messages:
    13,888
    Location:
    My own world inside my head
    Buy my 24 inch wheel. Thats a quick easy way to slacken a HT
     
    #4 -   Jan 6, 2008
  5. PatBranch

    PatBranch Turbo Monkey

    Rep/Likes:
    8 / 7
    Joined:
    Sep 24, 2004
    Messages:
    10,461
    Location:
    wine country
    I have an '04. Thanks for the :spam:, but then people would think my bike is a specialized bonghit. :rofl:
     
    #5 -   Jan 6, 2008
  6. DirtyMike

    DirtyMike Turbo Fluffer

    Rep/Likes:
    54 / 635
    Joined:
    Aug 8, 2005
    Messages:
    13,888
    Location:
    My own world inside my head
    HA, thats why I stopped running the 24 back when I had the FR frame!!!
     
    #6 -   Jan 6, 2008
  7. ChrisRobin

    ChrisRobin Turbo Monkey

    Rep/Likes:
    5 / 45
    Joined:
    Jan 30, 2002
    Messages:
    2,928
    Location:
    Vancouver
    I've seen pics of people putting longer shocks in there and removing the shuttle altogether to not change the geometry. You could do the same but keep your stock sized shock.
     
    #7 -   Jan 6, 2008
  8. PatBranch

    PatBranch Turbo Monkey

    Rep/Likes:
    8 / 7
    Joined:
    Sep 24, 2004
    Messages:
    10,461
    Location:
    wine country
    Would it be okay to mount the shock with a bolt and spacer/reducers w/o the shuttle?
     
    #8 -   Jan 6, 2008
  9. ChrisRobin

    ChrisRobin Turbo Monkey

    Rep/Likes:
    5 / 45
    Joined:
    Jan 30, 2002
    Messages:
    2,928
    Location:
    Vancouver
    I don't see why not. The shuttle is bolted to the frame either way so what difference would it make. Check first by loosly bolting the shock in there without spring to see if your wheel hits your seat or seat tube.
     
    #9 -   Jan 6, 2008
  10. -Danno-

    -Danno- Chimp

    Rep/Likes:
    0 / 0
    Joined:
    Jan 31, 2006
    Messages:
    39
    The tire will hit the seat tube on an 04 with the 8.5 X 2.5 direct mounted. People swear it would even hit on the 01 with the bent seat tube, but mine appears to just clear.

    Checking is a good idea. It helps to just pull the shock, set the bike down, let the tire hit the seat tube and measure the compressed i2i length. That'll let you know what your options are.
     
  11. W4S

    W4S Turbo Monkey

    Rep/Likes:
    3 / 23
    Joined:
    Mar 2, 2004
    Messages:
    1,284
    Location:
    Back in Hell A, b1thces
    only way to do it would be a custom shuttle, shorter shock or a 24", even the shorter shock will let the rear tire bump the seat tube in the slackest setting. (You know that the stock shuttle has two settings right?)
     
  12. BMCarter

    BMCarter Monkey

    Rep/Likes:
    0 / 0
    Joined:
    Oct 10, 2007
    Messages:
    299
    Location:
    Santa Barbara
    i debated doing this on my bullit before the bike was hit by a car, now i have a V10.

    i had the 8.75x2.75 5th element ($99 from santa cruz).

    you can remove the shuttle and enlarge the holes to fit a shock bolt, and use a rear mounting bushing on the front. this way you can slacken the ht angle. this would also allow you get the longer travel shock, and when that is used it would steepen the ht angle, but still not be too steep.
     
  13. PatBranch

    PatBranch Turbo Monkey

    Rep/Likes:
    8 / 7
    Joined:
    Sep 24, 2004
    Messages:
    10,461
    Location:
    wine country
    I'd rather not enlarge the holes if I don't have to. What are the two positions of the stock shuttle? Just flipping it over. I did that and took pics from the same angle, and there wasn't a change in geometry.

    I'll see if the it clears the seattube when I get home, friday/saturday.
     
  14. ATOMICFIREBALL

    ATOMICFIREBALL DISARMED IN A BATTLE OF WITS

    Rep/Likes:
    0 / 0
    Joined:
    May 26, 2004
    Messages:
    1,354
    Location:
    Tennessee
    Simply slide the shuttle (forwards & backwards) & use the "two" sets of bolt holes that you want.
    I use a 8.75"x2.75" shock with the shuttle in the slack position(shuttle forward toward the headtube), & use a tall 2005-66RC fork.I could always get a standard 8.5"x2.5" to get slacker if i want too!
     
  15. BMCarter

    BMCarter Monkey

    Rep/Likes:
    0 / 0
    Joined:
    Oct 10, 2007
    Messages:
    299
    Location:
    Santa Barbara
    enlarging the holes is the only way to direct mount the shock to the frame. if you still want to use the shuttle, you can enlarge the holes in the shuttle as well. a shock bolt is a larger diameter than the shuttle bolts.
     
  16. Salami

    Salami Turbo Monkey

    Rep/Likes:
    2 / 0
    Joined:
    Jul 17, 2003
    Messages:
    1,622
    Location:
    Waxhaw, NC
    Moving the shuttle foward will lower the BB and slacken the head angle. If I remember correctly BB changes about 0.75" and head angle by about 1.5 degrees.
     
  17. PatBranch

    PatBranch Turbo Monkey

    Rep/Likes:
    8 / 7
    Joined:
    Sep 24, 2004
    Messages:
    10,461
    Location:
    wine country
    That would be a noticeable difference. So, the shuttle has 3 frame mounting holes? I forget.
     
  18. BMCarter

    BMCarter Monkey

    Rep/Likes:
    0 / 0
    Joined:
    Oct 10, 2007
    Messages:
    299
    Location:
    Santa Barbara
    only 2 positions