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Wheel change
Save Energy

Video Suspension

Video Tyres 1
Video Tyres 2

Video History of Wheels 1
Video History of Wheels 2
Video History of Wheels 3
Video History of Wheels 4
Video History of Wheels 5
Video History of Wheels 6

Video Tyre label
Video History Sec. Wheels
Video Winter Tyre
Video Snow Chains
Video All-weather Tyres
Video Where to mount new

Video Radial Ply Tyre
Video Cross-ply Tyre
Video Low Cross-section
Video Tyre fitting
Video Additional information
Video Wheel Balancing
Video Bus Wheel Balancing
Video Tyre Production 1
Video Tire Production 2
Video Speedlimits
Video Wheel Load Limits
Video Roller Reststance 1
Video Stiction
Video Emergency Running 1
Video Emergency Running 2
Video Tyre Press. Control 1
Video Tyre Control 2
Video Tyre Press. Control 3
Video Rims
Video Alloy Rim
Video Alloy Rim (production)
Video Drop-center Rim
Video Spoked wheel
Video Rim Hump
Video Rim (truck)
Video Emergency Wheel
Video Offset
Video Wheel Positions
Video Wheel-measuring
Video Wheel Base
Video Steering Offset
Video Castor
Video Steering axis incl.
Video Wheel Alignment
Video Relative Steering Angle
Video Track
Video Camber
Video Obl./Side slip angle
Video Axle Alignment 1
Video Axle Alignment 2
Video Axle Alignment 3

Video Tyre Calculation
Video Inch -> mm
Video Slip
Video Axle Load Distrib.
Video Payload Distrib.
Video Roller Resistance 2

Video Wheels
Video Wheels 2

          A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Road Resistance

Road resistance
is reduced
Road resistance
is increased
high tyre pressure
large wheels
narrow tyres
low cross-section

fine tread profile
solid wheel rims
low payload
clean road surface
smooth road surface
fast driving
tyre pressure too low
small wheel diameter
wide tyres
large cross-section
high churning
chunky tread
high brake cooling
payload fully utilised
road with coated surface
rough road surface
slow driving


The road resistance is one of the constant driving resistances, always present, but not, e.g., like the wind resistance, which increases rapidly with the driving speed. This makes it difficult to reduce.


In this case, not only the friction between the road and the tyre plays a part, but also the movement within the tyre (churning). The tyre is, depending on internal pressure, burden and dimension, more or less compressed when rolling on the road surface. Even the driving speed is relevant, because at higher speeds, the dynamic wheel radius increases. Actually, one must also add the losses through friction, which e.g., rims with a lot of openings or tyres with a chunky tread profile cause when interacting with the surrounding air. Not to mention, in particular, the air-flow to cool the brakes.
Just as one can hear the different noises that the same vehicle causes on various road surfaces, is, in these cases, also the road resistance different. This has to do with the road itself, but also with the surface covering, e.g., black ice.
The previously mentioned factors can be slightly influenced by the driver, the following, hardly at all. They are partly dependent on the construction, and partly on the maintenance requirements. Belonging to this is the rolling friction in the sometimes adjustable wheel bearings and the friction within the brakes. The question here is, how much play does the brake disc or drum need, to prevent the brakes dragging shortly after the braking operation or permanently? Some modern braking systems also use the drag to keep the discs free of water.               Top of page               Index
2001-2015 Copyright programs, texts, animations, pictures: H. Huppertz - E-Mail
Translator: Don Leslie - Email:

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