Hi, I've been reading your forum and it's been really useful, so I was hoping for some specific advice.

Not having been on a bike since childhood, I'm planning to do a 90km charity ride in August. It'll be along the north east coast of England, so a bit hilly but not mountainous, on roads. I'm 28 and not unfit, but I will not be racing anyone! I'm looking for a second hand bike due to budget constraints and was considering a hybrid in order to have the option of paths/canal routes for training. I found an advert for a Lombardo visoke treking bike - any comments? This model only seems to be available from Tesco (suspicious, I know you guys won't rate!) but does anyone know if Lombardo make decent bikes?
If not, would a mountain bike be suitable, as there are a lot more of them on offer second hand, and cheaper!
Thanks for your help
Nicola