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  1. #1
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    Retrofitting a disc tab to a steel fork---bad idea?

    I'm interested in converting my Surly Crosscheck to front disc, because it's an all weather commuter and I would rather replace discs than rims. I'm having a hard time finding nice looking, inexpensive steel forks in that spec (400mm axle-crown, 44mm rake) and was wondering how bad of an idea it would be to have a disc tab welded on to the stock fork. I get the feeling that those blades might not hold up to the stress but I thought I might ask you all anyway.

    On a related note, if I just threw on a nashbar 398*45 steel fork and called it a day, do you think my steering would be noticeably different? The bike would certainly be noticeably worse looking. But if that's the price of rims that last more than a year I may take it.

  2. #2
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    It would probably be cheaper just to buy the fork. Nasbar has a 700C fork for about 40 bucks. Surly has discs forks as well. If you go to Spicer and use their search forks fascility you should find more. One degree and 2 mm are zero effect assuming the numbers are accurate.

    You can certainly have a bracket welded or brazed, it has to be done by someone who knows what they are doing, then you have to use the finished prodruct in a maner consistant with what you have. I doubt the Surly fork is too weak, but you just need to be reasonable. The Nashbar cross fork is a battleship.

  3. #3
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    Thanks Peterpan1, I will contact some local builders and see what they think about the fork retrofit.
    Last edited by mander; 02-06-08 at 03:00 PM.

  4. #4
    Senior Member mtbikerinpa's Avatar
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    It is quite doable to retrofit if you have a reputable welder. I made a disc tab and had it welded on my steel frame almost 8 yrs ago and it's 17k miles of racing and no signs of flex yet. Just be totally sure on alignment. Measure twice or more, weld once.
    Aviation Mechanic, Bike racer, Fitness Equipment Restorer

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