bent front rim again....

Discussion in 'Parallel Universe' started by deguoren, May 11, 2014.

  1. deguoren

    deguoren 该出手时就出手

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    well it was all fun and laughter today until I hit a big ass stone.

    [​IMG]

    My front wheel isn't even a year old. Ok the first time it was my own fault, hitting a gate on the farm (which somebody closed in the 20 min between me riding in and out again)

    Now the question arises what to do with it. Leave it like that for now and ride on?
    one of the guys with me today said he would ride with this rim 3000 km through Africa.
    My plan is just 2500 km onroad in the Alps....

    Or should I rush a replacement ? Buy an Excel rim and use the spare hub I have left from my first crash?
    http://shop.touratech.de/excel-rim-with-set-of-spokes-for-bmw-f800gs-for-front-wheel-53-34-x-5-46cm-21-x-2-15-36.html
    #1
  2. cadaVre

    cadaVre Been here awhile

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    Do you own a bench, a hammer and two hands? :wink:
    #2
  3. Captain Excellent

    Captain Excellent +ll+

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    I did much the same type of damage to my front rim and didn't feel comfortable riding it. I was afraid of loosing a bead in a corner. I ended up with a new set of wheels (front and back) from Woody's Wheel Works. Great wheels that have stood up through rougher stuff. I even had a pinch flat rather than a bent rim this year in Death Valley.
    But, all that and I've seen guys riding with far worse damage for thousands of km with no problem. I'd be interested to hear what others think about loosing the bead in a corner and how bent is too bent.
    #3
  4. Reaver

    Reaver Outta Here

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    Minor.

    You've got a tube so it won't go flat. The bead isn't going to just pop out so long as there's air in it. You just don't want mud and stones getting in there. My front rim was WAY worse and on a bench with lots of time, I made it straight as possible. Put 55K kms on it since.

    They bend easy, they unbend easy. A soft radius bend is fine. A sharp square edge type where the aluminum shows stress and cracks, not so much. All depends on your resources and options.
    #4
  5. FredRydr

    FredRydr Danger: Keep Back 500 Ft.

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    Since you already have a spare front wheel, the Excel rim isn't a huge expense.

    Fred
    #5
  6. jengel451

    jengel451 1 Cool MotherF#$cker

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    If all of the spokes are still tight, and the rim is still true, just pound it back with a dead blow hammer and call it good.
    #6
  7. ohgood

    ohgood Long timer

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    100% bead on one side
    95% bead on the other

    Put a c clamp on the tire with a 10 foot cheater pole and let us know how far it launches when you slip trying to unseat the bead.

    Cause the bead ain't going no where on that wheel.
    #7
  8. sorebutt

    sorebutt Long timer

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    What psi were you running when you bent it?
    #8
  9. deguoren

    deguoren 该出手时就出手

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    I had 2.2 bars ~ 32 psi on the tire
    As I don't have a garage or workshop the DIY method is a bit difficult to organise for me. Also beside the motorbike I only have a push bike, so if I take the wheel out I ain't gonna go nowhere.

    Even if I leave it like that, or if I would be able to hammer it mostly straight - in 2 months time I have to renew my TÜV (German MOT). Then it might would not pass.

    As I am looking further into Excel rims, they don't come with a type approval so the TÜV will likely give me a hard time...
    Comments from German riders a mixed, some didn't had any issues some yes.
    Some just take the Excel stickers of and it doesn't get noticed... some have huge difficulties to produce the necessary paperwork...
    #9
  10. Loutre

    Loutre Cosmopolitan Adv

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    where in germany do you live? My uncle from köln bent his S10 front rim and hammered it back into place (using "ein gürtel" and a hammer leaving minimum marks on the rim) and had no problem with the tüv a couple of month later.
    #10
  11. deguoren

    deguoren 该出手时就出手

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    in Hamburg.

    I kept the rim from my first crash, if I find somebody with a workshop I could practise a bit on that one before doing it on my current rim.

    If that works I take the front wheel off, get the tire of and try to hammer it straight. Maybe I put some silicone or similar in the gap for now - then no dirt can get in for and later I just clean that off again.
    #11
  12. Stephenmarklay

    Stephenmarklay Been here awhile

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    I say get the new rim. Chances are you will bend the OEM again and perhaps in an inconvenient spot.
    #12
  13. cadaVre

    cadaVre Been here awhile

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    It's ok to bent a rim back - even in germany. I've had it done to my car wheel for example in my only car crash ever. Bent the front left rim and the guy in the shop just took a big hammer and made it "look good again". TÜV never cared, even said "if it doesnt look like its gonna explode while driving 10km/h we are ok with it".

    Just be gentle while pounding it back, but something on the back so you wont over do it, take you time and maybe dont use a steel but a softer hammer. (copper, plastic, whatever...)
    #13
  14. Reaver

    Reaver Outta Here

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    I think he's REALLY trying to justify a mod to someone and wants us to help. :1drink

    He's already got the fancy rotors.
    #14
  15. deguoren

    deguoren 该出手时就出手

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    Actually those a half the price and half the weight of the OEM parts ;-)
    Made for the 650 GS and no type approval for the 800 GS...

    Had seen and rode them on a rental 800 GS. They from Lucas, but even in the Lucas catalogue the measurements are not correct FYI its MST 337 RAC
    #15
  16. Bayner

    Bayner Long timer

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    I have those rotors too, I like them.
    You could probably even bend that rim back into shape with the tire still on it. Fix it up properly during the winter.
    #16
  17. guzzimike

    guzzimike Long timer

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    Do you still have standard front suspension?
    If so, there is your problem.
    The front forks bottom out and something has to give..................
    #17
  18. UpST8

    UpST8 turnin gas to noise

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    Tire tool insertion point is made and yep, this is minor. I would ride the hell out of it :D

    [​IMG]

    [​IMG]

    This is my rim after Kofa, AZ trails. Went with an Excel A60 from Woody's after this, as I had already bent it back into shape once before. Problem is now solved and staying solved

    [​IMG]
    #18
  19. deguoren

    deguoren 该出手时就出手

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    I have hyperpro progressive springs. It really was a huge stone.,,,
    Was riding uphill in loose sand in a track from a wheeled tank. saw the stone too late, only the edge poking out.
    Didnt took a picture, but below is one how some parts of that proving ground look like.

    I might work on it on the weekend and will post the results afterwards

    [​IMG]
    #19
  20. deguoren

    deguoren 该出手时就出手

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    So I did it on Friday night, my boss was so kind to let me use his garage.

    what worked best for me in the end was to put a aluminium hammer below the dent (any piece of aluminium would do I guess) and hammering it out with a panel beating hammer. As this was too light I used a heavier hammer to drive the panel beating hammer on the dent. The dent is still visible but the gap is closed now.

    Next time I would fixate the wheel better, may by another piece of wood on top - screwing it down on the bench and get a heavier hammer. Took almost 2 hrs- next time should be done in less than one, using the learning curve ;-)

    [​IMG]

    before:
    [​IMG]

    after
    [​IMG]


    well disaster struck again on Saturday, while I went for some modest greenlaning
    On a piece of tarmaced road I caught a nail....

    [​IMG]
    #20