Originally Posted by
ColinL
It has been covered many times, including recently in the road forum. Inertia is crap on bicycles, totally irrelevant. Weight matters. Rolling resistance matters a lot. Aerodynamics matter too, especially as you go beyond 15 mph, if you ever do that on a commuter. (I do.)
However you did say something correct. I have a set of 700x32 tires that weigh more than more 29x2 tires: Conti Cyclocross Plus. Weight usually corresponds to width, but tire models vary a lot.
Just to be difficult, weight and inertia go hand in hand. The more weight towards the outer part of the wheel "rim, tire" the more inertia thus meaning more effort to make a wheel spin.