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Rolling resistance, sometimes called rolling friction or rolling drag, is the force resisting the motion when a body (such as a ball, tire, or wheel) rolls on a surface. It is mainly caused by non-elastic effects; that is, not all the energy needed for deformation (or movement) of the wheel, roadbed, etc., is recovered when the pressure is removed.
Pressures below this leads to increased rolling resistance and likelihood of pinch-flats. Pressures above this leads to less rolling resistance in the tire itself but to larger total energy dissipation caused by passing vibrations to the bike and especially the rider, which experience elastic hysterisis.
There are a number of variables that determine rolling resistance: tire tread, width, diameter, tire construction, tube type (if applicable), and pressure are all important. Smaller diameter wheels, all else being equal, have higher rolling resistance than larger wheels. [49] "Rolling resistance increases in near proportion as wheel diameter is ...
Your tires actually play a surprising role in how fast you ride, and what you think you know about rolling resistance is probably wrong.
Low rolling resistance tires are designed to reduce the energy loss as a tire rolls, decreasing the required rolling effort — and in the case of automotive applications, improving vehicle fuel efficiency as approximately 5–15% of the fuel consumed by a typical gas car may be used to overcome rolling resistance.
Rolling resistance can vary by a factor of 10 or more depending on type and dimensions of tire and the tire pressure. [17] Air resistance increases greatly as speed increases and is the most significant factor at speeds above 10 to 12 miles (15 to 20 km) per hour (the drag force increases in proportion to the square of the speed, thus the power ...
Advantages include reduced rolling resistance [citation needed], perceived increased stability while retaining quick handling, and an enhanced ability to roll over obstacles. One item that is often raised is tire contact patch size and shape. All else being equal, such as tire width, rim width, inflation pressure and rider weight, the contact ...
In a non-scientific study (I looked at tires available from a national chain that fit my car), 85 percent of LRR tires had an “A” rating for traction, compared to 87 percent of Non-LRR tires.