[Farnsworth]

I have a single speed with nobbies and was wondering if there are any issues with replacing them with street tires (slicks I think they're called)?

 

[dovitsky]

nope!

people do this all the time! just make sure its the right size, as you probably know!...but if you MTB tires are like 26x2.1 it is ok to run a 26x1.75 or what not. what tire are ya thinking of using?

 

[Cyclomatic]

I've done it a couple of times with no issue.