Ok. I already have a CF Motobecane Imortal Force with the ultegra 6600 setup driving a 10 cog rear.
I know the amazing stiffness of the frame (ability to transfer power to the road)
I have the chance at the IF Frame/fork for $200 under what BikesDirect is asking(new,still in box) and the temptation to build one up into a freewheeling single speed is extremely tempting. (maby going with a 110bcd 44t/16t rear)
I'm wondering if anyone has.
(if this is a subject that's been recently broached, send me the link and I'll delete this post)
Thanks
Rich

I'm not sure what you are asking-

If your question is "Can I convert my Imortal Force to a SS" the answer is Yes.

-but-

If the frame in question (I'm too lazy to go look it up) has vertical dropouts (as most modern road bikes do) you may have issues with getting a correct chain tension if you arent running an external chain tensioner.

If you are buying a frame to build from scratch anyway, why not buy a frame with track ends that was made for single-speeding. The advantages of a SS-specific frame include: track ends allow easy chain tensioning, standard 120mm rear spacing so you don't have to add a bunch of spacers to fill out a 135mm rear, steel offers as plush a ride as CF but it's a lot more durable.

Your choice of 44/16 gearing should be fine for most riding conditions.

you could do it. just make sure you get a 130 mm hub or a 120mm hub with spacers.

Eno hub

https://www.whiteind.com/rearhubs/singlespeedhubs.html

LOL. Try an aluminum track frame if you want "amazing stiffness".

the question is....why would u...?

it would be fun to get weird looks from people.