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Technical Cycle guards ,radiusing advice

Discussion in 'The Hokey Ass Message Board' started by wandi harry, Aug 29, 2024.

  1. wandi harry
    Joined: Jul 19, 2008
    Posts: 341

    wandi harry
    Member

    Down here cycle guards/ mudguards are a requirement for registration so l figured go with the traditional old school way and use a 36 ford spare tyre hoop. So l am into it a bit and as can be seen l really need to change the contour of the guard to get a better fit. Not looking to change tyre diameter at this stage.
    Would heat shrinking be an option? Thoughts?
     

    Attached Files:

  2. hfh
    Joined: Oct 22, 2012
    Posts: 508

    hfh
    Member
    from Western MA

    How about getting smaller tires? These are 500/16. ‘36 spare tire covers. IMG_5417.jpeg IMG_5418.jpeg
     
  3. BJR
    Joined: Mar 11, 2005
    Posts: 11,047

    BJR
    Member

    Gotta love the Hamb. The OP says he doesn't want to change the tire diameter, and the first post suggests he do just that. :p
     
    SS327, crosleykook, Bugguts and 9 others like this.
  4. LOL! I caught that , too.

    Ben
     
    lothiandon1940 likes this.
  5. Onemansjunk
    Joined: Nov 30, 2008
    Posts: 504

    Onemansjunk
    Member
    from Modesto,CA

    Why fight it! hfh shit looks right. Why mangle a spare tire cover to change radius. upload_2024-8-29_6-19-34.jpeg
     
  6. Petejoe
    Joined: Nov 27, 2002
    Posts: 12,545

    Petejoe
    Member
    from Zoar, Ohio

    At 250.00 a tire, I’d almost bet you could have a set of fenders made.

    Me??
    I’d slice it in the middle, add 3-5” and metal finish it. IMG_0907.jpeg
     
    alanp561 and lostone like this.
  7. '29 Gizmo
    Joined: Nov 6, 2022
    Posts: 1,130

    '29 Gizmo
    Member
    from UK

    Tricky, as you open it out it would flatten the profile slightly. Another option is to put transverse slits accross the raised bead and the reweld them to pull the radius out. A lot of work.

    Plan B would be to get the correct radius tire cover from a 4x4 and someone with a bead roller to form the profile.
     
    wandi harry likes this.
  8. 34Phil
    Joined: Sep 12, 2016
    Posts: 695

    34Phil
    Member

  9. jnaki
    Joined: Jan 1, 2015
    Posts: 11,023

    jnaki

    View attachment 6170676

    Hello,

    When we owned a Harley Sportster, the front fender was a nice accessory. It kept the crapola off of my/our faces and chests from all of the road grime. As much as it was stock, we wanted a modified drag bike look for our custom motorcycle. We tried to take it off and go for a long coastal ride. After a trip southward for of about 30 miles to Laguna Beach, we just enjoyed the ride and ambience, but we hated the small flying objects kicked up from the “no front fender” application.

    So, when we got home, the fender came back on and now, it was comfortable on all future road trips. Even my wife, sitting behind me still got blasted from those flying objects that were hard to see, but we felt everyone of them.

    Much later, some of the old hot rod roadster builders were also in need of fenders for the front exposed tires. If the open wheel roadsters or RPU were over 1500 lbs, then front fenders were a requirement. So, like most, a mad dash to the junkyards to look for replacements ensued.

    Jnaki

    At a photo shoot, one roadster owner that was around the location asked where we got the custom front fender. He was measuring it and said it was perfect for his front tire situation. Nice coverage and he could use the existing holes to create a mount for his tire locations. The look was slightly flat, but would cover his front tires perfectly.
    upload_2024-8-29_6-52-6.png
    Note the full tire coverage and not like the photos that have been shown so far. Any exposed tires with narrow fenders will throw stuff up, so why not get something that covers the tires, but still looks nice.

    So, you might try a Harley Davidson dealer or a myriad of fender companies online. Amazon comes to mind. YRMV
     
    wandi harry likes this.
  10. J. A. Miller
    Joined: Dec 30, 2010
    Posts: 2,298

    J. A. Miller
    ALLIANCE MEMBER
    from Central NY

    It is traditional.:D
     
  11. Tim
    Joined: Mar 2, 2001
    Posts: 19,606

    Tim
    Member
    from KCMO

    You know as flexy as those things are I’d be tempted to build the supporting frame and brackets and see if when you flex it open to fit it on if you can just bolt it on and be done. Would it be in a little bit of tension? Probably, will be make any difference? I doubt it
     
    wandi harry likes this.
  12. What if you cut the fender shorter ?

    If you give your tire height I have a couple cut down fenders here in different lengths I can lay on a tire for a photo to give you an idea of how it'll fit.
     
  13. Bandit Billy
    Joined: Sep 16, 2014
    Posts: 15,199

    Bandit Billy
    ALLIANCE MEMBER

    It's only metal, build a buck, heat it, slice it, hammer it, weld it, hammer it some more, grind it and body/paint. I have to say I don't like it when the tire and fender have different radiuses.
     
    wandi harry, 2OLD2FAST and Tim like this.
  14. Tim
    Joined: Mar 2, 2001
    Posts: 19,606

    Tim
    Member
    from KCMO

    As a little extra note I’m 99% sure a 35/36 ford had a 600-16 tire from the factory. assuming the spare was full size that ring should fit that tire. Maybe it got tweaked and you just need to tweak it back.
     
    wandi harry likes this.
  15. lostone
    Joined: Oct 13, 2013
    Posts: 3,451

    lostone
    Member
    from kansas

    I always wandered about maybe airing up the tire to 60 pds, wipe a little grease on the treads and then setting the fender on it, wrap a tie strap around the tire and fender and start ratcheting it down.

    Can't see where it might cause too much damage....


    ....
     
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  16. gene-koning
    Joined: Oct 28, 2016
    Posts: 5,382

    gene-koning
    Member

    Yep, flatten the arch a bit and the radius will change.
     
    wandi harry likes this.
  17. Turns
    Joined: Jan 3, 2009
    Posts: 128

    Turns
    Member

    If you stretch the outer edges of the fender it will increase the radius of the curve to fit your tire better
     
    wandi harry likes this.
  18. Rob28
    Joined: Oct 25, 2014
    Posts: 309

    Rob28
    Member
    from Calgary AB

    swade41, lostone, leon bee and 3 others like this.
  19. wandi harry
    Joined: Jul 19, 2008
    Posts: 341

    wandi harry
    Member

    thanks for the replies
    The cost of a new similar tyre down here will set me back probably over $500 per tyre once fitted so exploring options.
    Will not get it passed if I was to cut it shorter.
    I will try some stretching flattening on a bit of the off cut, I feel that the centre ridge is going to make it difficult to get it to "open up"
     
  20. wandi harry
    Joined: Jul 19, 2008
    Posts: 341

    wandi harry
    Member

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