We have been asked by visitors to help identify different wheels from German vehicles. Our diagram on the left shows the various shapes of holes. These correspond to the following;
1 = 6 holes as found on HK10L "Kettenkrad."
2 = 5 holes as found on 1 ton tractor: Sdkfz10 series.
3 = 8 holes as found on 3 ton tractor: Sdkfz11 series.
4 = 8 holes as found on 5 ton tractor: Sdkfz6 series.
5 = 8 holes (7 on early models) as found on 8 ton tractor: Sdkfz7 series.
6 = 8 holes as found on 12 ton tractor: Sdkfz8 series.
7 = 8 holes as found on 18 ton tractor: Sdkfz9 series.
NB. 6 holes are also common to the Raupenschlepper Ost series of tractors.

Left are two examples of German roadwheels ; top is from an Sdkfz 251 halftrack, below it is a road wheel from an early Sdkfz7 tractor.

The construction of these road wheels is common. The main part of the wheel is a steel pressing, the rim is then welded onto the wheel at three points (see above right). The rubber tyre is applied. To be sure that you are not buying a post war Czech wheel (from an OT810 for example) you should look for the following makers of German rubber wheels: Continental, Deka, Vorwerk and even Dunlop can be found. Above right is the DEKA logo on an Sd.kfz 251 wheel.
On the Sd.Kfz6 made  by Büssing-NAG the type 9 wheels have 60mm wide, 60mm high rubber, with a 571 inner/outer diameter. These pads have W304 stamped on them.

Pads with W302 originate from the Daimler Benz l8 (leichter 8) or Büssing NAG l8, this is the 1938 model with shorter tracks, 55 links and a total length of 8800mm. They were probably also used on Sd.Kfz 251 vehicles as well. The tracks on a Büssing NAG9 had 46 links and a total length of 9200mm. 

SdKfz 10 wheels had rubber  tyres 550 x 45-479mm. Pads marked W102 come from this semi-track. Also found on the SdKfz 10 early rubber wheels from 1939 marked Vorwerk: 45x477/550. Vorwerk: 550/45-479
Continental: No 806 E: /45-497,5
jnk: No 806: 550/45-479

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