My Raleigh Rush Hour currently has a threadless 1 1/8-inch fork. My friend has a threaded 1-inch threaded fork he can give me. My question to the knowledgeable people:

Can my bike accept this change in forks, and, if so, what is involved? A new headset?

I'm new to bike mechanisms, but I am learning from the folks on this forum. Thank you!

In order to accommodate a 1" threaded fork in your 1 1/8" frame, you will need a very specific type of adapting headset. The only one that I can think of offhand is the Chris King Devolution:

https://www.chrisking.com/headsets/hds_devo.html

That said, I don't know that the Devolution comes in a threaded version, so you might be out of luck. Others may have other suggestions. In any case, I don't know that spending $125+ just to use a threaded fork is on a rush hour is well-advised.

no offense but this was covered literally last night, but it's okay, the thread wasn't clearly labeled.

you can switch the bike to threaded by changing out the headset to a 1 1/8" threadless design (most are 1"). That will accept a standard quill threaded stem.

https://aebike.com/page.cfm?action=de...=30&SKU=HD3203
It should be warned that the threaded fork and stem combo will likely look awkwardly small and out of place on a frame with a 1 1/8" headtube, you might want to consider not doing this. Especially since threadless is a technically better system. If it is purely for aesthetics I would take a step back and think if you really want to go through with this.

revision: on second look for most 1 1/8" threaded headsets you will see they are designed for 1 1/8" forks, not 1" forks. So my last post is wrong and shants is right. Basically there is no headset that will allow you to do what you want to do, Chris King's is only to let you use a 1" threadless in a 1 1/8" headtube.

Thank you, both. You are correct in that it's not worth spending money on the King's system in order to change to a free threaded fork. I am just as happy with the threadless 1 1/8-inch fork. I thought I'd ask, since the free threaded fork is a beautifully chromed piece.

save it for another bike.

This will reduce the head tube from 1-1/8" to 1": https://www.bikemannetwork.com/biking/p/COMPHSRED/HD7200

You can use a 1" threaded or threadless headset, stem, and fork.

Unless the 1" fork is something special, I wouldn't bother.

I'll take the fork...

+1
I agree, there's always time for another build! (not always the room though)
*ding* Oh that's the alarm to notify me that the bill for my storage unit is due! : /
Don't let that sweet fork go to waste though, find a bike.

Could you explain why you want to change from a perfectly fine system to one that is functionally inferior, less rigid and heavier?

I'm still trying to figure out how exactly this thing works. The reducer goes into the headtube, and then a regular threaded headset is pressed on top of the cups?

Yep... I've seen reducer cups like that for headshock (1 1/4") and 1.5" headtubes before, and that's how they work.