Converting threaded forks into aheadset

This seems like a logical and simple solution in my head.

I have a set of forks with a 220mm steerer tube. Its gonna cost me quite a bit to get them rethreaded and cut down...

However, Ive had the idea of chopping off the top and turning them into 1 inch ahead forks...

Does this seem logical??

What is the hieght of an ahead stem?

Cheers
Nick

shouldn't cost that much to get cut down and threaded further, retro_di_corsa does it i think, or just search "threading forks" or something similar.

Ive asked him and he said he couldn't do it as he has too much on.

I've taken it to my local bike store and they said that the steel was too hard for his cutter to get through and that the only other option would be for an engineer to do it. The engineer quoted me £50 estimate because of the setup charge.

So thats left me with the idea of convertin it to 1 inch ahead. I reckon ill need about 200mm steerer, so the stem would clamp onto about 1cm of thread and the rest would be solid tube.

This sounds ok in my head but want confirmation. The other thing I need is average stem stack height, which I'd assume is around 4-5cm?

Cheers

i am unaware of whether it will be alright. but there are loads of different stack heights, you also need a new headset remember.

Yeah I know...

From what I've read it will be okay...

All I have to decide is whether I'd prefer to spend £50 getting the steerer lathed, or using that to buy a new headset and stem...

At least that way Ill be getting something new out of it!

If you get the stack height right it should work...

Also, Velosolo sell a 22mm stack 1 inch aheadset for £10.95... Bargain!

The other thing I need is average stem stack height, which I'd assume is around 4-5cm?

38mm to 44mm for road/XC stems, a bit more for some DH stems.

Headset stack varies quite a bit:
Chris King 13.7+17.7=31.4 (not the highest, I have a 33.5mm FSA on my desk and others may be higher still)
Crank Bros Cobalt 10.03+10.53=20.56
Cane Creek Aer 12.05+7.9=19.95
"Crank x Creek" 10.03+7.9=17.93 (lowest I know of)

Ideally, you should have a small spacer above the stem, so that the steerer projects fractionally through the stem clamp. Although fork and stem makers sometimes suggest the steerer can finish up to 3mm short of the top of the stem, having it go all the way through makes it much less likely that the stem will walk up the steerer under the cyclic loading and mess up your headset adjustment.

http://www.sjscycles.co.uk/product-Shimano-M:Part-Shimano-Aheadset-Converter-1-Inch--Black-14216.htm could help

Cool... I've worked out that including my headtub it will be about 195-200mm so I've got plenty of steerer... The stem clamp would be on about 15mm of thread however, but I'm thinking that if I get a 1 1/8 stem with a shim this will make it much stronger...

Retro de corsa has got on touch and we are discussing threading so I now have to decide which option is best for me... Threading would be the simplest although the ahead would be an interesting little project!

if the steer tube is lonf enough then it will work, even if clamping fully on threads.

put everything together. mark it. disassemble and cut a few mm below the mark (or above the mark and use a spacer).

that said, you'll need a new headset (at the least, the top part) and a stem.

cheaper to just get it threaded for 50 unless you're going cheap.

the over arcing truth is that the threads don't matter for shit. clamp away.

Some of those stems are lovely!

However, they seem to be 1 1/8 and I'm after 1"

I've seen a few out there, the lowest so far for 1" is 22m

Nick

38mm to 44mm for road/XC stems, a bit more for some DH stems.

Headset stack varies quite a bit:
Chris King 13.7+17.7=31.4 (not the highest, I have a 33.5mm FSA on my desk and others may be higher still)
Crank Bros Cobalt 10.03+10.53=20.56
Cane Creek Aer 12.05+7.9=19.95
"Crank x Creek" 10.03+7.9=17.93 (lowest I know of)

Ideally, you should have a small spacer above the stem, so that the steerer projects fractionally through the stem clamp. Although fork and stem makers sometimes suggest the steerer can finish up to 3mm short of the top of the stem, having it go all the way through makes it much less likely that the stem will walk up the steerer under the cyclic loading and mess up your headset adjustment.

^you can get a 1" to 1" 1/8 shim.
I took all my threaded parts off and am riding ahead on all my bikes. you just need around 3 cm extra steertube and you're done.

EDIT: pic not what I expected but its ok, nevermind. you get the point.