the geo doesn't worrie to much to be honest as this bike will be used an everyday bike with an 8 speed set up on the rear and not as a pure out trials bike ! ( maybe a little ) I did realise that the rear rim brakes would be a huge fail so I am going to go for disk style brake set up front and rear. Looking for any issues that would make this impossible to do really as I haven't seen anything that says it cant be done but at the same time don't want the bike to look like a clown should be riding it ....