height doesn't make a difference, how tall is cls, no one tells him to go stock edit: mods can be easier first time bikes there's no reason not to go stock, there essentially big mods anyway now. most riders who ride mod end up going stock, for some unknown reason. I still wonder about going back after 2 years on each haha. your best bet is to read up as much as you can on products to know what to look for. namely isis bottom bracket and cranks. oversized handlebars. sealed bearings and a good freewheel or freehub