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the numbers you are listing are diamater not the circumfrance. Split the difference in diamater in half and you get the drop. but the effective drop is 81mm so if you origionall had a for of 369mm AC (you sure about this height? Are you measuring to the crown race or the inside of the crown? Generaly 700c for is aroud 395-400 so fork of 475-480 is what you are looking for.
young_gun
Chaley
I know it shouldn’t work, but it’s not that bad. I had a bit of a weave around and a little trip down the track and it didn’t pedal strike once.
I did a little back of the envelope working out and;
Original fork 369mm AC
Original tyre 700x23c = 668mm circumstance*
New tyre 406x50 = 506mm circumference*
I’ve also crammed a 700x32mm in the back = 686mm circumference*
So a new fork of >< 450mm AC should be spot on maybe? Unless I’ve lost the ability to count, which is quite possible.
The fork in there has a 437mm AC so not too far off?
The frame has a BB drop of 53mm.
If I do give this a proper go I’ll “just” extend a BMX fork anyway (like this Brooklyn) I’m just trying to see if it’s worth the bother or if I should go the extend the head tube route on a steel frame?
All input appreciated though, shout if I’m being dim.
*diameter you idiot!! I know what I meant it was late ok, I’d been up since 03.40… and the dog ate my homework…
Thanks @young_gun