I am not a huge fan of the multi tool. most bikes need either one or two allen wrenches or open end wrenches for any adjustment on the road, so I only carry what I may need for that bike (plus a spoke wrench). a chaintool is a good idea when mountainbiking.
most people carry a multitool for "emergencies" right? how are you going to readjust that cable with a 1" long allen after you tightened it at home with an extra longhandled allen wrench with 1' extension on it?
__________________
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk