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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

Drop-center Rim


All the other types of rims are more or less a thing of the past, whether it concerns the three-part triplex rim or the flat-base rim with removable rim-edge. Ever since tyres have been, almost exclusively, mounted by machines, Motorcycles, cars and trucks have a uniform construction. From the costs, safety and wheel-weight aspect, it seems to be the most sensible solution.


For the illustration of the drop-center rim we have selected a particularly nice example from the motorcycle field. As always, the problem to be solved is, to mount the tyre on the wheel-rim so that it doesn't fall off again by itself. Thereby, it must be pressed in on one side with the bead in the deep bed so that the other bead can be levered over the rim-edge. This is the only way it can be mounted onto a one-piece wheel-rim. Even the particularly sporty, multi-part, light alloy rims have a drop-center. Their rim-bowl is bolted together and both parts are sealed together in the production.

The beads of the tubeless tyres are pressed onto the slighty slanting seat in the direction of the rim-edge. Once it has overcome the rim-hump, mostly with a loud bang, it is securely seated and can only be removed with the help of hydraulics/pneumatics.

By the way

As a rule, tyres with an inner tube are still required for the wheel-rim shown above. 05/10               Top of page               Index
2001-2015 Copyright programs, texts, animations, pictures: H. Huppertz - E-Mail
Translator: Don Leslie - Email:

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