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Anyone had this done with a steel fork? I've got Kona P2s on my commuter, I might fancy discs. How much did it cost?
Yes, a couple of times, once as a freebie, once by cheap and cheerful local guy, £20 or so 20 years ago. I was warned it would break but neither did in the short time (1 year) I rode it (the frame broke first).
Proper builder will charge you more than a new fork if you include a respray.
Bonding a mount on using carbon fibre wrap (BUT NO SPOONS*) will work too. I'd probably go for something sh off ebay.
*you can use a spoon if you like, but I never did.
I can respray it myself.
Fiberfix and epoxy might work...hmm...
Madness. Disc fork legs are different than rim brake forks to meet the stresses. The fork leg could snap and front end bike failures are catastrophic, potentially life changing or fatal. The loss of front braking is similar, if your brazing isn't good or your fibre reinforced glue fails.
Old thread on same https://singletrackworld.com/forum/topic/fitting-disc-brake-tab-on-90s-4130-cromo-rigid-mtb-fork-flexstrength-probs/
For the price of a disc fork, why bother? Second hand if you're happy to respray it too.
As is often the case, think "what's the worst that can happen?"
In his case the answer is broken fork at 50km/h causing face / tarmac interface.
If you think it's worth the risk crack on.
Had it done on a P2 by a mate many years back, long before disc forks were readily available and relatively cheap, still working fine on somebody elses commuter. Would I do it now, probably not, for the reasons given above, but if you do go ahead,another thing to consider is whether your dropout is brazed in, like mine was, and likely to move, as mine did.
Disc fork legs are different than rim brake forks to meet the stresses.
Oh yeah I knew that but I didn't think of it.