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  1. #1
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    Fork bending tool

    My Motobecane Grand Record, 1980ish edition was delivered yesterday. It was an ebay purchase at a darn good price. To my delight it was in very good condition. Some nicks and scratches, but for a 30+ yr old bike, not bad.

    Big problem I noticed was the front brake pads were below the rim when the pads were adjusted to the top of their adjustment. Looked at the fork and I thought, hmmm... looks like someone was pulling wheelies and landing them hard.

    Soooo..... made due with an improvised fork bending tool. It worked. Bike rides straight. Fork is still not the most graceful of bends but only I will notice.


  2. #2
    Senior Member Steve Whitlatch's Avatar
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    And I thought it was a weight bench. I have passed up many of fork bending tools at the resale shops and never even knew.
    My bikes - 1989 Schwinn Circuit - 1950`s Criterium (French)
    Wife`s Bike - 1980 Schwinn Voyageur 11.8

  3. #3
    Senior Member rjhammett's Avatar
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    There is always the self proclaimed 'redneck' method if you don't have a weight bench/clothes holder available.

    How to straighten a bent bicycle fork - YouTube
    Travis Bickle
    You talking to me?

  4. #4
    Ride, Wrench, Swap, Race dddd's Avatar
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    Most important thing when bending fork blades or stays is to have a reference point from which to measure the progress during bending.

    The opposite-side fork blade or chainstay can provide such reference, as long as it is not being subjected to any loads during the straightening.

    Blocks of wood can prevent the localized loading that might dent tubing or cause too much localization in the bend location.

    You can sight across the side profile view of the fork to determine what is needed to make the fork blades parallel and with identical shape/bend profile.

  5. #5
    surly old man jgedwa's Avatar
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    Curiously, "Fork Bending Tool" was my nickname in highschool

    jim
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  6. #6
    Senior Member rootboy's Avatar
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    Necessity is the mother..

    Great stuff, Big Ring. Tell us more. How the fork blade was bent, and how you applied the pressure, etc.
    Computers are useless. All they can give you are answers.
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  7. #7
    Still learning oddjob2's Avatar
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    Curbs and potholes are about as easy as it gets for fork bending.
    Life is like riding a bicycle. To keep your balance you must keep moving. Albert Einstein
    2014 Additions: 1985 Trek 560, 1992 Trek Multitrack 700 (my 2nd), 1994 Trek Carbon 2200, Peugeot PX-10, 1981 Schwinn Voyager, 1989 Bridgestone RB-1

  8. #8
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    Quote Originally Posted by rootboy View Post
    Necessity is the mother..

    Great stuff, Big Ring. Tell us more. How the fork blade was bent, and how you applied the pressure, etc.
    After discovering the brake pad problem and noting the huge curve of the fork I googled Moto grand record and came up with a picture of the bike i bought on ebay. I'm guessing this bike may have gone through a couple owners till it was put on ebay. Who knows. As you can see the fork has/had a whopping curve to it.

    The wheelbase before I worked my magic was 41". Now it is 40", which would be typical for this bike, I would think.

    The "technique' was simple. I wrapped hockey tape around the fork to protect it. Inserted the fork into the holes in my weight bench and leaned into it a bit. Then eyeballed it. Then test fit the wheel to make sure everything was square and centered. The bike still has a slight pull to the left. But can be ridden no hands with a bit of butt english. Probably needs the forkends aligned.

  9. #9
    Senior Member OldsCOOL's Avatar
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    I had a rim unbender that doubled as a garage door.
    Having a flat tire as part of the total cycling experience is highly overrated. Knowing how to fix one quickly is not.

    '85 Trek 460 road racer

    '89 Raleigh Technium PRE

    '79 Motobecane Super Mirage

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