Road wheels on a mountain bike?

[Elmer Fudd]

Never a problem with Schwalbe on my old bike, until they perished due to old age.

 

[Globalti]

If all you want is a faster tyre, have a look at the Specialized Crossroads. Wiggle are offering a set for a good price, here: http://www.wiggle.co.uk/ProductDeta...60022196&N=Specialized Crossroads EX Tyre Set

Not a light tyre but it runs fast and smooth on tarmac while having enough tread for the occasional offroad trip.