Wheel rim profile

Discussion in 'Hacks' started by Bobmws, Feb 15, 2014.

  1. Bobmws

    Bobmws Curmudgeon At Large

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    At one time I had measurements of different wheel rim profiles. Darned if I can find that info now! :eek1
    I'm planning on getting a BMW R1200C cast rear wheel, 15" x 4", this would bolt right on my K.
    I'm aware that the 15" bike rim is larger than the 15" car rim. I need the car rim measurements to get the bike wheel machined to the proper size.
    If anyone has a lead on an R1200C wheel, let me know. :ear
    Thanks
    #1
  2. FR700

    FR700 Banned

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    Probaly the information you asked about.

    15"
    car 14.968"
    bike 15.08"


    [​IMG]
    #2
  3. Bobmws

    Bobmws Curmudgeon At Large

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    Thank you Luke, that's what I was looking for. The diameter is the killer on the 15" rim as it has been known to damage the beads.
    Once I get a wheel, I'll see how much material there is for reshaping the seat. Not sure that is too critical as the 195/45-17 on the stock 17" rim has no issue with seating and sealing, the tire is just too short, and a bit wide at the swingarm brace.
    #3
  4. claude

    claude Sidecar Jockey

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    This (15" car 14.968" bike 15.08") is the main importance.
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  5. Bobmws

    Bobmws Curmudgeon At Large

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    Yes Sir. I figure removing .056 diameter from the bead seat and the bead hump should save the bead cords from being destroyed. May remove a bit of the bead hump to widen the seat if there is enough material.

    Still have to locate a wheel.
    #5
  6. FR700

    FR700 Banned

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  7. Bobmws

    Bobmws Curmudgeon At Large

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  8. FR700

    FR700 Banned

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    Have you done the math on a used 15x4 Centerline and an adapter ?

    Are you taking the .056 off the rim or farming that out ?


    .
    #8
  9. Bobmws

    Bobmws Curmudgeon At Large

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    No, I've not yet priced that out, I really do have to call Claude.
    I do like the fact that wheel is a direct bolt on.
    I'll have to farm out the machining, I'm not that precise with an angle grinder......
    #9
  10. FR700

    FR700 Banned

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    If you were closer I'd knock one out at cost for you.
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  11. Bobmws

    Bobmws Curmudgeon At Large

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    Thanks, I do appreciate the offer. You don't happen to be visiting Disney World with the Leprechauns in the near future, do you? :D
    Looks like the centerline wheels are pretty reasonable, I'll get with Claude next week.
    #11
  12. FR700

    FR700 Banned

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    Funny you should say that.



    All BS aside, it would be the way to go if you are into it that far $ wise with the bm' rim and machining.

    If you farm the adapter out to a local machinist buddy, your existing rim will give them all the dimensions they need. They'll just need to know the backspacing of the new rim to determine how wide to make it. They'll also need a 60 degree cutter to do the cone washer seats.


    .
    #12
  13. davebig

    davebig Another Angry Hun !

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    Lukes idea is way better than that cruiser wheel if the irrepressible Stroker's around he would should have enough info to crank out a wheel or adapter.DB
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  14. Bobmws

    Bobmws Curmudgeon At Large

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    Just ordered it from Claude. :wink:
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  15. davebig

    davebig Another Angry Hun !

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    Claude needs to make a living also.DB
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  16. claude

    claude Sidecar Jockey

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    A note on this 15" wheel thing. Years ago a guy used to come to rallys and turn down 15" cycle wheels at the event. He had a home made device that the bike wen ton. Th ecycle tire go removed from the rear wheel..wheel reinstalled and then the bike was actually turned into a lathe of sorts right on the spot. The bike ran in gear and spun the rear wheel and he went to work on it. When done the 15 car tire was mounted and away ya went. For some reason he quit coming around.....we can only speculate what may have happened. Not condoning this deal at all just thought it was interesting to bring up.
    If anyone does decide to turn down a 15" cycle wheel there needs tobe plenty of meat there to keep it structurally sound. How much is enough? Not going there. Also the turned down section should be almost polished smooth with no ridges or lines ot create stress risers which can cause bad things to happen.
    One other point....using a car wheel with adaptor is advantageous in that you can get the tire mounted anywhere. When mounting a car tire on any motorcycle rim, many many places will refuse to do it due to liability concerns.
    Not an issue with a car wheel and car tire of course.
    Note that we can use " centerline wheels in lieu of the wheels we typically use if someone wants that. They are, however, more costly.
    #16
  17. Bobmws

    Bobmws Curmudgeon At Large

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    Out of curiosity, which wheel am I getting?
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