You can reduce friction on a bike by keeping the chain clean and lubricated, ensuring the tires are properly inflated, and using high-quality bearings in the wheels. Regular maintenance and tuning of the bike will also help reduce friction and keep it running smoothly.
Naturally, it all depends, but let's assume the following: Best case, low miles, bike runs well, some wear and tear, brakes & tires good exhaust good then roughly 1500. Bike runs, brakes ok, tires worn, exhaust rusted, then 1200. Bike barely runs (with choke) needs tires, brakes ok, exhaust rusted, then 1000. Bike not running, needs tires, needs exhaust, brakes not working but gas tank is ok (not rusted, not leaking) then 2-300 if low miles, if high miles (>50k) forget it. Worst case, not running, seat dry rotted, brakes not working, tires cracked, exhaust rusted, only good for parts, 50.00
There shouldn't be, as long as the tires are the proper size for the bike
For riding on hard, smooth surfaces narrow smooth high pressure tires are used. For riding on soft, uneven surfaces wide knobbly low pressure tires are used. For conditions in between tires in between are used.
One of the biggest benefits of low profile tires is that there is better braking but those seeking a comfortable ride will want to stick with what the manufacturer recommends. The visual worth of low profile tires can outweigh functionality but areas with high curbs or snow will be more troublesome to navigate through.
Kinda-sorta, but it'd depend on how finicky you are, and what bike you're talking about. A "real" road bike will often be built only to take narrow, high-pressure road tires, so a wider, softer terrain tire just won't fit in the frame/fork. But if your bike has enough room for wider tires, then there are "terrain" tires available for most of the wheel sizes used today. The biggest selection is in the 26" AKA 559 mm ETRTO and the 28" AKA 700C AKA 622 mm ETRTO sizes, where you can find tires for just about any terrain. Spiked/studded winter tires, tires for gravel/hardpack, mud tires, and so on.
If that happens, you are running them at too high of a pressure. Consult the pressure recommendations printed on the sidewall.
You tires are worn out because either the car needs an alignment, you are running them with either too low or too high air pressure, suspension parts are worn, steering parts are worn, or the tires were defective.
No, Cooper Tires are excellent high quality tires .
Doing "high knees", squats, or running up a very steep hill with weights.
The operating temps are allot lower causing less heat build up in high stress areas
Cross training is good for your body and can be very intensive. It is not as effective as running, however, the same benefits can be yielded if it is done at high intensity and over a sustained period of time (e.g. cross-training for one hour equates to roughly the same benefits as running 5 miles).