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  1. #1
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    Welding a New TopTube

    I have a Iro Mark V and it was given to me after an accident. The Top tube has a dent that goes in about a half inch and its about 5-6 inches from the headtube. I want to replace the TopTube but i dont know ANYTHING about frame building. Is it a good idea to just find the correct length tube and decent chro steel and get a welder to weld it on? I mean, is there any special rules to this ( how to weld, what to use when welding, material, ect)? Like Anything at all that i should know ahead of time. thx in advance

  2. #2
    cs1
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    Senior Member cs1's Avatar
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    Most welders will have problems with thin wall tubing. Check out a local frame builder first. Good luck
    1999 Waterford RSE-11, 1995 Waterford 1200, 1989 Specialized Rockhopper Comp
    1989 Raleigh Technium, 1989 Schwinn Traveler, 1986 Specialized Rockhopper
    1984 Specialized Stumpjumper, 1986 Specialized Stumpjumper and just way too many projects to list.

  3. #3
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    Really a half inch in? If not and there's no crease in it, then iron out the dent. Clean up with sanding and filler and repaint.

    Replacing the tube calls for special knowledge and skills from beginning to end. Everything from tube selection to welding or brazing is bike specific. The only welders qualified for this job are probably all doing bikes already.

  4. #4
    Senior Member Homebrew01's Avatar
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    Quote Originally Posted by Boost250i View Post
    I have a Iro Mark V and it was given to me after an accident. The Top tube has a dent that goes in about a half inch and its about 5-6 inches from the headtube. I want to replace the TopTube but i dont know ANYTHING about frame building. Is it a good idea to just find the correct length tube and decent chro steel and get a welder to weld it on? I mean, is there any special rules to this ( how to weld, what to use when welding, material, ect)? Like Anything at all that i should know ahead of time. thx in advance
    Is it the common handlebar dent caused by a crash ? Picture ? 1/2" deep literally or figuratively ?
    Only let a real framebuilder work on it. No idea about pricing, but don't forget the repaint costs too ....
    Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike

  5. #5
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    Dont know where you are located but I know Circle A Cycles does this sort of repair all the time. Here's a couple examples, including a bike that was hit by a car: http://www.circleacycles.com/brian/c.../bike-repairs/

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