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Unsprung mass is a consideration in the design of a vehicle's suspension and the materials chosen for its components. Beam axle suspensions, in which wheels on opposite sides are connected as a rigid unit, generally have greater unsprung mass than independent suspension systems, in which the wheels are suspended and allowed to move separately.
The Bollinger Commercial Platform for medium-duty Class 3-6 trucks is a rear-drive skateboard chassis with a leaf-sprung rear live axle and front double wishbone suspension that will be offered to upfitters, [18] which will use the platform as the basis for tow trucks, trash trucks, buses and other commercial EVs.
Traditionally, these weights have been made of lead; it is estimated that up to 500,000 pounds (230 t) of lead, having fallen off car wheels, ended up in the environment. [8] According to the US Environmental Protection Agency , worldwide these total more than 20,000 tonnes of lead annually, [ 9 ] and therefore the use of less-toxic materials ...
The following Jaguar cars were fitted with the first generation IRS as part of their original specification. The second column indicates the vehicle's approximate rear track, according to whether the narrow, medium, or wide version of the suspension assembly was used. [2] [7]
A 1977 Harley-Davidson XLCR with seven-spoke alloy wheels manufactured by Morris [8]. High-performance motorcycles began to use cast alloy wheels (usually aluminum but sometimes magnesium) as early as the Münch Mammoth, with its single cast-elektron [9] rear wheel which was shown at the Intermot motorcycle show at Cologne in late 1966. [10]
This design shares the same advantages as in-wheel motors while avoiding unsprung weight and wear issues, as the motors are near the wheels but inside the chassis, supported by the suspension. Near-wheel motors are less compact than in-wheel motors, but as of 2022 they are more reliable and more cost-effective, [22] they avoid the risks ...
Suspension also affects unsprung weight. Many cars have suspension that connects the wheels on the two sides, either by a sway bar and/or by a solid axle. The Citroën 2CV has interaction between the front and rear suspension.
Production all-electric vehicle – 2025 Lucid Air Pure RWD with 19 inch wheels with 146 combined / 149 city / 142 highway MPGe [42] The following are as sold in Europe: Volkswagen XL1 , diesel-electric PHEV , 0.9 L/100 km (310 mpg ‑imp ; 260 mpg ‑US ) on the New European Driving Cycle [ 43 ]