Ahead stem on a threaded steerer?

[Splatter Paint]

Is this possible, assuming the steerer tube is a constant diameter?

The reason I ask is Chris667 has kindly offered me a set of forks, but I was a bit uncertain whether I could fit them. He's getting back to me about the lenght of the un-threaded portion, as I was hoping to clamp the stem on this, not the threaded bit.

SP

 

[MJN]

As long as your clamping on the un threaded part it'll be fine.

 

[Splatter Paint]

Problem solved he's come back with a set of ahead forks with the SFN in too - what a gent! Thanks though.

I love RetroBIKE!

SP

 

[Dar Kuma]

I have actually used a threaded steerer with ahead stem, with a headlock very successfully.
Note you would use a headlock if you are doing this....

 

[dyna-ti]

Unless you are clamping it to an untreaded section ,then its not worth the surgery.
Remember the steel is thinner as it has a thread cut into it.

Consider-would you use a hacksaw to cut a shallow groove on an ahead steerer,directly below the stem clamp?

And a headlock isnt going to stop it from breaking,sure ,you wont suddenly sit bolt upright holding a set of bars with extreme thoughts jumping to mind but you will be tasting blood and fear that day all the same.

Something not usually planned for on a days ride

 

[Dar Kuma]

I spose a normal pair of forks I agree, The forks I used were cromo trek bruiser, The steerer was actually pretty chunky compared to other steerers.

 

[jacks2ts]

I have a set Of Coyote F1 fork that is threaded 1 1/8 fitted to my GT zasky using a I beam ahead stem. was able to do this by using plumber's ptfe tape around the thread, its held good for 13 years

 

[Dead Rats]

keeping away from the thread sounds wise, as does a Hope head doctor expander type or Azonic Headlok thingy... most things are worth a try if you've a few spares kicking around, I built a bike for a mate to commute on, a £100 (he-paid-me-cost-for-parts-type) affair, it has a complete 1" headset threaded fitted inside the cups of a 1 1/8th threaded headset :shock: this was so I could use a rigid fork to get it up n running... it was a blatant bodge which I showed him and while it was only meant to be a stop gap while we found the right size it's still going strong 13 miles a day a whole year later (ie he's done over 3500 miles on it since and hammers it, wishing he could take his FSR to work! )... thank god it ain't ever gone wrong!