BS ISO 4000-2:2021

What is ISO 4000-2 about?  

ISO 4000-2 is part two of the multi-series standard on passenger car tyres and rims. 

ISO 4000-2 specifies the designation, contour and dimensions of 5° tapered (drop-centre) rims primarily intended for passenger cars. 

Who is ISO 4000-2 for? 

ISO 4000-2 on passenger car tyres and rims is applicable to: 

• Passenger car tyres and rims manufacturers and suppliers 
• Passenger car tyres and rims users  
• Passenger car manufacturers  

Why should you use ISO 4000-2? 

Specifications for the rims can be complex and cannot be understood by everyone. 

ISO 4000-2 provides designation and markings for rims that you can use to identify and trace the rims. 

ISO 4000-2 gives guidelines for the valve hole edges on the tyre side of rims. 

ISO 4000-2 lays out dimensions and tolerances of the rims which will help you in manufacturing more durable rims. 

What’s changed since the last update?  

BS ISO 4000-2:2021 is the sixth edition that cancels and replaces the fifth edition (ISO 4000-2:2013), which has been technically revised. 

The main changes compared to the previous edition are as follows 

• The article of valve hole for snap-in valve and clamp-in valve has been divided 
• The tolerance of circumference for round hump has been corrected