cheers for the replies!! I would go single speed but i've got a 10 minute ride on a normal bike to my riding spot. Plus i really like the look of the old school bikes (gears and seats). The road cassette that i had on my bike before had really small allen key bolts that went right through nearly all the cogs and spacers. I'm thinking that I could get the same cassette again but cut the bolts down, loose 3 cogs and then the bolts will still spread the load over the whole cassette. What do you think?