bleedingapple

ok so i have read about these in the nature of their use as just clamping a threadless stem on it but what i really need to know is can i use one ( the bbb BHP-20, https://www.bbbbikeparts.net/headparts_bhp20.php) to convert a threaded steer tube to threadless? (using a threadless headset with it) i ask because i have a 1" threadless headset and stem and cant find any threadless forks of the kind i need/want that dont break the bank, but found a threaded fork that is what i need/want and on top of it, its steer tube is too short even if i wanted to switch it over to a threadless headset... so would this work? i know its not a perfect setup, but am i setting myself up for bad things going this route? the bbb one seems to be made just for this sort of conversion? by the way, should this be a viable option do you know if you can cut the bbb adapters to length too?

FBinNY 

If the fork's steerer is long enough to reach through the headsets top assembly, the adapter will allow a conversion to a threadless system with no serious drawbacks. You should use body filler to fill the threads so the headset's centering can slide smoothly, otherwise you'll have problems adjusting the headset. If you can find a fork long enough to cut off all the threaded area that would be better.

If the steerer isn't long enough to reach through the top assmebly I wouldn't try exending it via the adapter. It'll create structural weakness, and possibly headset alignment problems.