Specialised Automobile Services 
Britain's Leading Wire Wheel Specialists    

Hub and Spoke Sizes
The tables on this page will enable you to establish your wheel hub and spoke sizes.

Some spokes are butted so that the hub end of the spoke has a larger diameter than the rest of the spoke.

Spoke

Always mention it if your spokes are butted but describe them using the smaller diameter. The end of the spoke is threaded using rolls which make the finished thread of larger diameter than that of the spoke. The thread is of B.A. form and has 32 threads per inch.

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Wire Gauge - diameter of spokes

Imperial Wire Gauge

America Wire Gauge

Diameter in inches

Diameter in millimetres
2 0.258 6.527
3 0.252 6.400
4 0.232 5.894
3 0.229 5.816
5 0.212 5.384
4 0.204 5.181
6 0.192 4.876
5 0.182 4.622
7

0.176

 4.470
6 0.162 4.114
8 0.160 4.064

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Wheel Hubs
In Europe most hubs are of the Rudge-Whitworth type with V-shaped standard splines having dimensions as below. In America, and also on Rolls-Royce cars, you may find RAF type hubs which have square splines.

Actual hub diameter is taken across the outside of the splines on the car, not from the wheel hub which is shown here in cross section.

The wheel type designation refers to the maximum size of the outer bearing in millimetres which can be used with that hub.
Hub
Wheel Hubs - dimensions in millimetres

Wheel type

Actual hub diameter

Number of splines

Spline length
Short hub

 Spline length
Long hub
35 52.0 62 36 56
42 62.5 75 37 62
52 73.0 88

37

 62
62 82.5 100 57 78
72 92.0 112 55 84
80 102.0 124 58 87
90 111.5 136 56 94
100 123.0 150 59 97
120 137.0 168 63 101

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Specialised Automobile Services, Langley Mill, Langley Road, Langley
Macclesfield, Cheshire SK11 0DG
Tel: 01260 253119     Fax: 01260 252699     e-mail: sales@wirewheels.co.uk

 

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