CHOP CULT HOME
Email Password
Search
  1. #1
    Junior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Aug 2012
    Posts
    4

    Default Trying to put a 5.5 rearwheel on a triumph

    I'm trying to put a 5.5 x 16 rear wheel on my 1967 triumph T120. I have a hard tail with a 6" stretch and a 2" drop. I'm going to cut and widen the hard tail to fit the rim. Am I going to run into a chain problem? Will I have to offset the motor?

  2. #2
    SamHain
    Guest

    Default

    Quote Originally Posted by jjschweizer View Post
    I'm trying to put a 5.5 x 16 rear wheel on my 1967 triumph T120. I have a hard tail with a 6" stretch and a 2" drop. I'm going to cut and widen the hard tail to fit the rim. Am I going to run into a chain problem? Will I have to offset the motor?
    I imagine so, most 16" tires wont even fit(centered).

  3. #3

    Join Date
    Jul 2012
    Posts
    188

    Default

    Don't expect it to steer straight,but it should fit in.Moving the engine to the left would just make it steer to the left more.

    The gearbox sprocket centreline is 3" from frame centre.The engine is already heavy on the primary side.Normally the rear rim centre is 2-15/16" from the rear sprocket centreline.That means the rim is shifted 1/16" toward the primary,to help balance out the weight of the engine.

    Say your chain is 0.850" wide and your tyre is 5.5" wide.They will be touching if the centre distance is 3.175" from sprocket centreline to rim centreline. The rear rim would be 0.175" off centre toward the timing side.You might want more like 1/4" off centre,so the chain doesn't touch the tyre.

  4. #4
    Junior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Aug 2012
    Posts
    4

    Default

    So I'm better off getting a smaller tire? It's more important to me that the tire is centered than the wide look. Hmmmmmmm

  5. #5
    Senior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Oct 2010
    Posts
    1,891

    Default

    It is common on Triumphs to off set the wheel to the right for chain clearance.

  6. #6
    Junior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Mar 2013
    Posts
    19

    Default

    All Triumph motors are off set less than 1\4". I put a 230 Avon Tire on my bike. That tire is 9 1\2" wide. Widen the frame and install a Jack Shaft. For all the guys who say "Jack Shafts suck" Tell that to the Top Fuel guys!!!! I'm trying to attach a few pics but new here!!! You might see this posted a few times!!!!!!! lol
    Attached Thumbnails Attached Thumbnails t4.jpg   t15.jpg   t3.jpg  
    Last edited by dicebike; 03-16-2013 at 9:32 AM.

  7. #7
    SamHain
    Guest

    Default

    Quote Originally Posted by dicebike View Post
    All Triumph motors are off set less than 1\4". I put a 230 Avon Tire on my bike. That tire is 9 1\2" wide. Widen the frame and install a Jack Shaft. For all the guys who say "Jack Shafts suck" Tell that to the Top Fuel guys!!!! I'm trying to attach a few pics but new here!!! You might see this posted a few times!!!!!!! lol
    looks like a good route if you want a wide tire.

  8. #8
    SamHain
    Guest

    Default

    Quote Originally Posted by Pete60 View Post
    Don't expect it to steer straight,but it should fit in.Moving the engine to the left would just make it steer to the left more.

    The gearbox sprocket centreline is 3" from frame centre.The engine is already heavy on the primary side.Normally the rear rim centre is 2-15/16" from the rear sprocket centreline.That means the rim is shifted 1/16" toward the primary,to help balance out the weight of the engine.

    Say your chain is 0.850" wide and your tyre is 5.5" wide.They will be touching if the centre distance is 3.175" from sprocket centreline to rim centreline. The rear rim would be 0.175" off centre toward the timing side.You might want more like 1/4" off centre,so the chain doesn't touch the tyre.
    just with an avon 5.00-16 tire, I was near 3/8" off center to the timing side for 1/16 chain to tire clearance, didn't like it and ditched the tire. A 5.5" wheel, seems like the problem would be much worse.

  9. #9
    Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Feb 2012
    Posts
    99

    Default

    i'm interested to hear how this turns out.

    I just brought home a triumph chop that has a 16" rear and the chain is rubbing against the tire. Can't quite figure how to fix it without buying a new rim

  10. #10
    SamHain
    Guest

    Default

    Quote Originally Posted by imwastefull View Post
    i'm interested to hear how this turns out.

    I just brought home a triumph chop that has a 16" rear and the chain is rubbing against the tire. Can't quite figure how to fix it without buying a new rim
    if the chains lined up the rim can be offset from the hub. Different tires also, shinkos are noticeably narrower than avons.

  11. #11
    Senior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    May 2011
    Posts
    1,451

    Default

    I did a 16 with a 5.0 Avon rear on mine last year. It was offset quite a bit to the right. Just make sure that bitch is locked down good and if you are running old style tensioners with the ribbed (locking) side of the washer make sure they are clean and not worn down much. If you run rear brakes only and need to stop kind of quick that wheel will tend to offset even more at an angle. If you stop hard enough you run the risk of locking up the rear and blowing a bearing (like I did )

  12. #12
    Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Feb 2012
    Posts
    99

    Default

    Quote Originally Posted by SamHain View Post
    if the chains lined up the rim can be offset from the hub. Different tires also, shinkos are noticeably narrower than avons.
    just checking, when you say "offset" you mean like put some spacers or washers in inbetween the drum hub and the rim hub?

    yeah, i need a new tire. It has some old Dunlop K181's that are way chunky. I'll have to check out those shinkos!

  13. #13
    SamHain
    Guest

    Default

    Quote Originally Posted by imwastefull View Post
    just checking, when you say "offset" you mean like put some spacers or washers in inbetween the drum hub and the rim hub?

    yeah, i need a new tire. It has some old Dunlop K181's that are way chunky. I'll have to check out those shinkos!
    No, I meant the rim can be laced offset from the hub. It may also be possible to space the drum off the hub, but you would also have to adjust the axle(drum) spacers accordingly.

  14. #14
    Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Oct 2012
    Posts
    58

    Default

    damn that 36 inch wide rear tire is ugly.

  15. #15
    Senior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Sep 2010
    Posts
    145

    Default

    I used a modern harley wheel by facing the rotor side by.250 an turning it to the chain side an making it the sprocket side an its tits
    Attached Thumbnails Attached Thumbnails image.jpg  
    Last edited by unit650; 03-31-2013 at 9:30 AM. Reason: Add pic

  16. #16
    Junior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Aug 2012
    Posts
    4

    Default

    Nice!!! I ended up machining the hub down to fit center. When it's all fitted ill post some pics!!!

Share This



Posting Permissions

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

Log in

Log in