This coefficient of rolling resistance is generally much smaller than the coefficient of sliding friction. In addition, only the so-called slip resistance involves friction, therefore the name "rolling friction" is to an extent a misnomer.Īnalogous with sliding friction, rolling resistance is often expressed as a coefficient times the normal force. 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.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. *Based on rolling resistance measurements on 16 ply tires sized 295/75R22.5.
#R284 ECOPIA VS XLINE ENERGY Z ROLLING RESISTANCE FULL#
To learn more about the full Bridgestone Ecopia tire line, visit the Bridgestone Commercial website. Designed to work together and complement Bridgestone Ecopia tire casings, Bandag FuelTech retreads are a reliable and sustainable business solution that can drive down fuel costs. Equalizer Ribs are also incorporated into the tread to absorb irregular wear and promote higher removal mileage.įleets looking to further capitalize on the fuel efficiency benefits of Bridgestone Ecopia tires can utilize fuel-efficient retreads to help extend the life of their tire casings. An optimized tread depth and width help to maximize tread volume while Defense Side Grooves within the tread pattern help to minimize shoulder wear for long original life. Other key features of the Bridgestone R284 Ecopia tire are designed specifically to address wear life. In addition, the proprietary Fuel Saver Sidewall compound works with the NanoPro-Tech polymer technology to reduce energy loss, ultimately improving fuel economy. An IntelliShape sidewall is designed with a slim bead to reduce tire weight and minimize rolling resistance. The Bridgestone R284 Ecopia tire features several design innovations to improve performance. “The R284 Ecopia tire will help make mobility more efficient by continuing to drive savings for fleets without compromising on quality or performance.” and Canada, Bridgestone Americas Tire Operations (BATO).
“Bridgestone launched the R284 Ecopia tire to provide our customers with enhanced solutions to maximize fuel efficiency and lower the total cost of tire ownership,” said Kyle Chen, brand manager, truck and bus radial tires, U.S. Tires designed for low rolling resistance contribute to a vehicle’s overall fuel economy and can be much more fuel efficient than conventional tires. This creates rolling resistance – the energy a vehicle sends to the tires to maintain movement at a consistent speed – which results in energy or fuel loss. When tires are in operation, gravitational forces create drag between the tire and the pavement. Engineered for premium performance in long-haul and regional service, the Bridgestone R284 Ecopia tire features an innovative tread compound for long wear life and patented NanoPro-Tech polymer technology for a 5% improvement in rolling resistance compared to the Ecopia R283A steer tire.* (Bridgestone) today announced the launch of the all-new Bridgestone R284 Ecopia tire, a SmartWay ® verified steer tire designed for improved fuel economy and enhanced treadwear.
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