I think offering the services would be a good idea but actually selling the tires is a near lost cause...i work for suzuki of atlanta and cycle gear SELLS tires for cheaper than we buy them. just make sure you can be competitive if you are going to make the jump, a lot of places buy in bulk or have their own warehouse-that gives them far better discounts that are pretty much untouchable. cycle gear doesn't make much money at all off their tires but its great advertising for them...just sucks for people trying to make money off tires, most are shut/ing down by now.

as far as the basic services, i think it'd be safe to offer...easy enough to stock oil filters since most are the same and bike oils. air filters are a little more trickey to "stock" because they change every model and some people want OEM, BMC, K&N, etc....if you want to buy suz. in bulk just gimmie a shout, arash came and got pads and filter from me before and i gave him the hook up.

good luck guys! would be neat to at least offer with appointment (time to get parts)