That is a good price for a curve. You might need a longer chain, see what the rear derailier looks like when you have the chain ring fitted. There is plenty of info on the net about getting the chain length right and how it affects the rear derailier angles. You will need a chainwheel with the correct number of bolt holes and the correct PCD to fit the crank. Again there is plenty of info on the net about how to work out what PCD your crank is. You shouldn't need to buy a D10 specific chain wheel. Good luck.
Thanks for this Cpg. The bike came with all sorts of bits and pieces (helmut, tools, lock etc), so it was a good deal. It was simply a matter of being patient and waiting for the right deal on ebay. I missed a lot as the prices were too high, but patience paid off in the end.
I live in Norfolk, England. If anyone can give me a local source for the parts that would be great. I'm new to bike upgrades so I need some help to make sure I get the right chain wheel guys.
Best wishes
Dexterdobe