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Wheel change
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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

Rim Hump


The rim beading means, in this case something like 'hump'. It was introduced with the conversion to tubeless tyres. It should prevent the tyre slipping off into the deep bed and the sudden loss of a lot of air, e.g., during hard cornering.

How it works

With steel wheel rims one can see the bead from the outside because the wheel rim has an appropriate groove. With alloy wheels it is cast into the rim. Sometimes it is only found outside, ('H' in the rim code) and sometimes, outside and inside ('2H' in the rim code). With this wheel rim one can recognise that it is rather more necessary on the outside than on the inside.With the mounting of tyres, the beading must be surmounted. In this case, a specific excess pressure of approx. 3-4 bar is induced. Mostly the tyre then gets over this barrier with a loud bang. Afterwards the pressure must, of course, be reduced accordingly. 06/09               Top of page               Index
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Translator: Don Leslie - Email:

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