OEMs’ flagship aerodynamic models have optimized the cab mirror systems. Aerodynamic mirrors come as an integrated set with an aerodynamic cover that lowers drag.
With well-designed mirrors, aerodynamic drag can be reduced by 2% to 3%. Considerable OEM and supplier tradeoff studies and analysis have optimized production mirror head shapes and mounting systems .
What Fleets Are Saying
“We continue to update our fleet with more fuel efficient post-2014 U.S. Environmental Protection Agency emission compliant engines, install aerodynamic devices on our tractors, and equip our trailers with trailer blades, which all lead to meaningful improvement in fuel efficiency.” — Knight Transportation
“Appearance and detail of our equipment means a lot to our drivers. Drive wheel fairings don’t just save us money, but our drivers like them too.” — Brad Pinchuk, Hirschbach
“Sleeper tractor aerodynamics have been finely tuned by all OEMs. Eliminating various features can add 10% to a fleet’s fuel expense,” — Chief engineer at a major truck builder.
The Confidence Matrix has been issued to help fleets make decisions about tractor aerodynamic devices.
- Fleets should use the standard, optimized aerodynamic packages developed by tractor manufacturers.
- Fuel efficiency can be lowered by about 10% by moving to partial or no aerodynamics.
- Tractor and trailer ride heights should be matched for as many miles driven as possible.
- Fleets operating day-cab tractors should pursue greater adoption of tractor aerodynamics.
- Tractor manufacturers should design and make available aerodynamic features for day-cab tractors including those powered by natural gas.
- Future EPA and NHTSA Greenhouse Gas Regulations will continue to challenge tractor builders to improve the aerodynamic drag of these vehicles.
- Daimler Trucks North America
- Kenworth Truck Co.
- Mack Trucks
- Peterbilt Motors
- Volvo Trucks North America