Your dealer will have a tube/wheel matching chart. If not, he shouldn't be a dealer. You can also get the info from the Bridgestone web site, from Denniskirk.com or any large internet tire sales outlet. If you fit a tube that is too large you run the risk of a pinched tube and a flat, or worse, and more likely, a blowout.
If your bike has stock wheels, your rear tire is a 130/80-17. Your rim is 3.5X17. Get a tube designed for THAT size rim --- and one that is also compatible with spoked wheels. (tubes fit a narrow range of rims, eg: 3.5/4.0, etc.)
Also: be sure the tube protector strip around the wheel next to the spokes was not ruined and also replace that if it is damaged.
Don't accept cobbed up combinations and don't take the verbal word of some mechanic who will tell you anything to get you out the door. He will forget he ever said it if it comes down to it.
Monte
