My frame is getting delivered today! I'm going to start to build over the weekend. I'm going to take the crankset and derailleurs off of my road bike. I'm wondering if I could put the tires - including cassette from my other bike on. The cassette from the road bike is 7-speed and the cassette from the other bike is 11-speed. I think the tires with the 11-speed are better quality and have the size tire I want. Does anyone see any problem with this? I'm most like going to be using my downtube shifters in friction mode.

Other options - I could exchange cassettes - do you see any problems with that? Differences in spacing, etc.?

I guess I'm wondering if cassettes and cranksets can be mixed and matched. (And if I'm using the wrong words/vernacular, please let me know! )

From what I've read - it seems like the size cassette determines the type of chain I would need...

Your help is appreciated!!! Thanks