Results 1 to 5 of 5
  1. #1
    mtbr member
    Reputation:
    Join Date
    Jan 2004
    Posts
    174

    3 questions about 4" burner rockers

    steve3 or someone can probably answer this...

    with my burner that i'm getting soon (not soon enough!), if i get the 4" rockers, will i need a different shock?

    also, and this is really important, will it change the geometry? the 70* head angle on the burner is about at my limit in terms of steepness, and i wouldn't want to steepen it any more than that.

    finally, if the new rockers DO steepen the head angle, can i compensate by running more fork (i have a psylo u-turn), or with that mess up the handling?

    thanks- help appreciated.

  2. #2
    No, that's not phonetic
    Reputation: tscheezy's Avatar
    Join Date
    Dec 2003
    Posts
    14,364
    You can run the same shock. You will need a stiffer spring if you use a coil, or add some air pressure if it is an air shock. That's it.

    The unsagged geometry will not change. The bike will sink deeper into it's travel to reach bottomout. The sag height will be a TINY bit different, since running the same percent of sag with more travel creates a greater absolute amount of sag. We are talking millimeters here. Don't worry.

    Adjustable travel forks are nice in any situation. Two different forks with the same amount of travel will often have different axle to crown distances anyway, and that affects the resulting head angle. Taller 100mm forks will make the HA slacker than shorter 100mm forks. Get an adjustable travel fork or pay attention to the A to C distance when shopping for a non-adjustable travel one. The Burner's geometry was calculated using a Fox fork (any one) set at 100mm which has an A to C of 453mm (I think, someone check that...).

    tscheezy
    My video techniques can be found in this thread.

  3. #3
    Not just famous; infamous
    Reputation: coolhandluchs's Avatar
    Join Date
    Jan 2004
    Posts
    1,073
    I think the Float 100 should be about 470mm AC height, according to Maverick's handy little fork comparison chart The 450mm would be for the 80mm version, I guess.

    Since we're already on this topic, The Vanilla/Talas 125 would be about 495mm.

    If you want a copy of the chart, go to www.maverickamerican.com under the forks in the products section and scroll down to about the middle. It's an Excel file. The numbers may not be perfect, but they're close enough for gov't work.

  4. #4
    No, that's not phonetic
    Reputation: tscheezy's Avatar
    Join Date
    Dec 2003
    Posts
    14,364
    Ooops, you're right. I was thinking of the 5" height as being 470 which is in fact the 4" height. All sorted out now.
    My video techniques can be found in this thread.

  5. #5
    mtbr member
    Reputation:
    Join Date
    Feb 2004
    Posts
    387

    Sell stock rockers

    Quote Originally Posted by Jordan
    steve3 or someone can probably answer this...

    with my burner that i'm getting soon (not soon enough!), if i get the 4" rockers, will i need a different shock?

    also, and this is really important, will it change the geometry? the 70* head angle on the burner is about at my limit in terms of steepness, and i wouldn't want to steepen it any more than that.

    finally, if the new rockers DO steepen the head angle, can i compensate by running more fork (i have a psylo u-turn), or with that mess up the handling?

    thanks- help appreciated.
    Any body want to sell there stock XCE/Burner rockers?

Similar Threads

  1. Changing a Burner to 4"?
    By SXSW in forum Turner
    Replies: 6
    Last Post: 12-30-2003, 09:25 AM

Posting Permissions

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