Knowledgebase: RUD Chains FAQs
What is a J number?
Posted by Charlotte @ The Roof Box Company on 07 February 2017 12:47 PM

The J number is stamped on the wheel itself. The exact location varies quite a bit and sometimes it's easier to take a look at the spare if you can't see it on your wheels. It refers to the depth of the wheel and is measured in inches. You are usually looking for a number like 6J or 7.5J. 

Take a look at the PDF below for more information. 

 



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 what is the j number.pdf (217.94 KB)
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