Although some researchers have included this term in rolling resistance, some suggest that this dissipation term should be treated separately from rolling resistance because it is due to the applied torque to the wheel and the resultant slip between the wheel and ground, which is called slip loss or slip resistance. Note that the slippage between the wheel and the surface also results in energy dissipation. Two forms of this are hysteresis losses (see below), and permanent (plastic) deformation of the object or the surface (e.g. 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. 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. This pressure is greater towards the front of the wheel due to hysteresis. The wheel is rolling to the left at constant speed.) Note that R is the resultant force from non-uniform pressure at the wheel-roadbed contact surface. ( W is some vertical load on the axle, F is some towing force applied to the axle, r is the wheel radius, and both friction with the ground and friction at the axle are assumed to be negligible and so are not shown. Results may vary.ĥ Directional tires for first half of life.Force resisting the motion when a body rolls on a surface Figure 1 Hard wheel rolling on and deforming a soft surface, resulting in the reaction force R from the surface having a component that opposes the motion. Results may vary.Ĥ Comparison based on R213 Ecopia vs. Results may vary.Ģ Based on TLCC 120,000 miles/year, $3.00 per gallon, 80,000 pound loaded tandem axle tractor and trailer.ģ Comparison based on R213 Ecopia vs. Designed to complement Bridgestone Ecopia tire casings, Bandag FuelTech retreads extend the service life of a tire and provide a reliable and sustainable business solution that can drive down fuel costs and maximize the useful life of Ecopia tire casings.ġ Comparison based on R213 Ecopia vs. and Canada.Ĭustomers looking to multiply the fuel efficiency benefits of Bridgestone Ecopia tires can utilize fuel-efficient Bandag retreads. The Bridgestone R213 Ecopia tire, which is EPA SmartWay® verified, will be offered in eight variations – with four sizes and two load ranges per size – at Bridgestone authorized dealers in the U.S. A redesigned defense side groove to better resist irregular wear, helping improve fuel efficiency and durability over the long haul.Directional stress relief sipes 5 to absorb shoulder edge forces in the footprint for even longer wear.Center rib sipes to evacuate water and improve traction on wet surfaces more effectively.An Intellishape ™ sidewall design containing less bead filler volume to reduce tire weight without compromising durability.A four-rib tire design with patented NanoPro-Tech ™ polymer to limit energy loss and enhance stiffness for optimum fuel efficiency.Key engineering improvements and innovations in the Bridgestone R213 Ecopia tire include: Additionally, a redesigned tread pattern paired with an innovative compound reduces tire weight, improving rolling resistance and fuel efficiency by 6% 4. Featuring directional edge sipes to resist scrub and offer up to 15% longer mileage 3, the Bridgestone R213 Ecopia outperforms the previous-generation Bridgestone R284 Ecopia tire. The Bridgestone R213 Ecopia tire delivers one of the industry’s strongest combinations of wear and fuel performance, providing more miles and a lower total cost of ownership 2. This translates to a better bottom line through the tire’s exceptional wear life and outstanding fuel efficiency.”
“The new Bridgestone R213 Ecopia tire harnesses major innovations in both materials and design to deliver smarter, more sustainable tire performance. “Today’s fleets are running their trucks longer and farther, making it critical to get maximum performance out of every tire purchase,” said Kyle Chen, brand manager, truck and bus radial tires, U.S.
The new tire is engineered to reduce operating costs by delivering ultra-high fuel efficiency, the highest ever offered on a Bridgestone long-haul steer tire 1, in combination with significant improvements in wear performance. Bridgestone Americas (Bridgestone) today announced it is expanding the company’s fuel-efficient Ecopia commercial truck tire line with the introduction of the all-new Bridgestone R213 Ecopia tire.
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