Thanks for your help and answers, much appreciated. I'm sure the bike is going to come with all the right gears, I just want to be able to buy a spare cassette for my other wheels (for races), and therefore wanted some advice on the right one for my roads as I don't have alot of experience. On the flat I am generally going about 32-34kph (19/21 mph) I just have little experience on what to buy, I live in a very small place without regular bike mechanics and seem to have a number of choices when I go online to look! I hope that as the season gets going I will be able to take my riding up a notch and therefore want to buy the cassette which will best suit and not leave me feeling I want an extra gear when I find a downhill!