Stem adaptor
 

Dumb question: i just got an old bike for $5, I thought I'd have myself a little project, but I have found that my stem is 7/8" compared to the 1 1/8" do you guys know of any adapters I can get?

Welcome to C & V.

Are you looking to from something like this.

Silver 1 1 8 Road Bike 21 1 Bicycle Threadless Neck Stem Adapter Adaptor 858126 | eBay

Yes! You are saint, thank you so much

Not so fast, do you need 21.1mm or 22.2mm or 22.0mm (old French standard)?

The fit needs to be very accurate to be reliable.

True 7/8" is closest to 22.2mm, using conversion factors.