Differences in bicycle efficiency

[rcgldr]

Other than lighter weight in the wheels, tires, and frame, does a $3000 bicycle have less rolling resistance (better bearings?), and less loss of energy in the chain drive (sprockets and chain?) than say a $400 bicycle?

I haven't been able to find any actual data on this.

[0rthodontist]

There's almost no loss in the chain anyway. Keeping the wheels in perfect alignment improves rolling resistance. The main difference in rolling resistance is tire pressure and width, but you could find the highest pressure and smallest width on racing bicycles that do not cost thousands.

[rcgldr]

Any idea on where to find the actual amount of energy consumed by the tires (I asume almost all due to rubber hysteresis, as the air in the tire is basically elastic), wheel bearings, and chain/gears?

[russ_watters]

Solid or 3-spoke wheels instead of traditional spokes makes a difference. Lighter/stronger materials reduce both linear and rotational inertia.

[rcgldr]

Any chance bicyles will ever go to tubeless tires (with the newer style wheels)? That should help reduce rolling resistance.

[Mech_Engineer]

Any chance bicyles will ever go to tubeless tires (with the newer style wheels)? That should help reduce rolling resistance.

Actually, many bicycles use tubeless tires right now, especially downhill racers. Do a search on google or go to a bike shop.

[brewnog]

Better bearings do reduce frictional losses slightly, but it's probably going to have less on an effect on resistance to motion than having dirty wheel rims or something.

[rcgldr]

Will have to check out the local bike shop. Are there tubless tires for road bikes (have they solved the issue with mounting large diameter tires)?