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Thread: rear wheel camber

  1. #1

    rear wheel camber

    if i was to decrease my rear wheel camber from 6 degrees to like 2 or 3. that would raise my rear seat height, correct?

    if so, how much?

    thanks ahead of time............

  2. #2
    Yes, it would raise the RSH.

    How much depends...

    ...on your total rear wheel/tire diameter. Tell me! Then I will tell you.

  3. #3
    It would change a miniscule amount. Here's calcs I worked up awhile back for various cambers and wheel/tire sizes:

    Attachment 45774
    Attachment 45775

    Changing from 0 to 6 degrees camber on a 540 tire (24IN) yields a change in axle height of 0.07IN (about 1/16"). Only when you change to sports' cambers (e.g., 18 degrees) is axle-height change noticeable: about a 9/16" (~0.59") for a 24" tire.

    NOTE for scale reference: in the top picture, camber is 18 degrees.
    Last edited by chasmengr; 07-20-2012 at 09:22 PM. Reason: fix typo's in diagram
    Chas
    TiLite TR3
    Dual-Axle TR3 with RioMobility DragonFly
    I am a person with mild/moderate hexaparesis (impaired movement in 4 limbs, head, & torso) caused by RRMS w/TM C7&T7 incomplete.

    "I know you think you understand what you thought I said, but what I don't think you realize is that what you heard is not what I meant."
    <
    UNKNOWN AUTHOR>

  4. #4
    Quote Originally Posted by ChrissyOT View Post
    Yes, it would raise the RSH.

    How much depends...

    ...on your total rear wheel/tire diameter. Tell me! Then I will tell you.
    right now i have 16 1/2 RSH. i've got 24 x 1 3x8 wheels. 6 degree camber. i wanna go to 3 degrees.

    what is it? like a 1/2 inch every camber degree? it's a gpv, with the washers. it has 6 washers now.

  5. #5
    Quote Originally Posted by rollin64 View Post
    what is it? like a 1/2 inch every camber degree?
    Because the change in height is based on trigonometry, the change in height is not a constant rate (like 1/2"/degree).

    Quote Originally Posted by rollin64 View Post
    right now i have 16 1/2 RSH. i've got 24 x 1 3x8 wheels. 6 degree camber. i wanna go to 3 degrees.

    what is it? like a 1/2 inch every camber degree? it's a gpv, with the washers. it has 6 washers now.
    For your 24" diameter wheels, changing from 6 degrees to 3 degrees of camber would raise your RSH about 1mm (i.e., 1/25") - miniscule.

    PS: sorry I jumped in. You were asking Chrissy
    Last edited by chasmengr; 07-20-2012 at 08:03 PM.
    Chas
    TiLite TR3
    Dual-Axle TR3 with RioMobility DragonFly
    I am a person with mild/moderate hexaparesis (impaired movement in 4 limbs, head, & torso) caused by RRMS w/TM C7&T7 incomplete.

    "I know you think you understand what you thought I said, but what I don't think you realize is that what you heard is not what I meant."
    <
    UNKNOWN AUTHOR>

  6. #6
    Quote Originally Posted by chasmengr View Post
    It would change a miniscule amount. Here's calcs I worked up awhile back for various cambers and wheel/tire sizes:

    Attachment 45774
    Attachment 45775

    Changing from 0 to 6 degrees camber on a 540 tire (24IN) yields a change in axle height of 0.07IN (about 1/16"). Only when you change to sports' cambers (e.g., 18 degrees) is axle-height change noticeable: about a 9/16" (~0.59") for a 24" tire.

    NOTE for scale reference: in the top picture, camber is 18 degrees.
    wow....thanks chasmengr. that kinda put things in perspective. it's fine you jumped in. i'm lookin for input, lol. miniscule is what i wanted to hear, haha.

  7. #7
    Senior Member
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    Leave it to chaz to point it out in a diagram.
    That's sarcasm, but definitely not in a bad way.
    Rollin' since '89. Complete C8

  8. #8
    Quote Originally Posted by Crappler View Post
    Leave it to chaz to point it out in a diagram.
    That's sarcasm, but definitely not in a bad way.
    Hey, I'm an engineer
    Diagrams are a huge part of my thinking process.
    Chas
    TiLite TR3
    Dual-Axle TR3 with RioMobility DragonFly
    I am a person with mild/moderate hexaparesis (impaired movement in 4 limbs, head, & torso) caused by RRMS w/TM C7&T7 incomplete.

    "I know you think you understand what you thought I said, but what I don't think you realize is that what you heard is not what I meant."
    <
    UNKNOWN AUTHOR>

  9. #9
    Senior Member
    Join Date
    Apr 2012
    Location
    Orlando, FL
    Posts
    660
    Quote Originally Posted by chasmengr View Post
    Hey, I'm an engineer
    LOL! Woo woo!!
    Rollin' since '89. Complete C8

  10. #10
    Don't forget to make sure your front casters are at 90o after changing. You may want to check for toe in/out on the rear wheels. If it feels more clunky after going to a 3o just move the cog up a smidge and it'll turn as fast as when it was 6o.

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