Unior 1643/4 Professional Chain Wear Gauge 0-1.3

The Unior Pro 1643/4 chain wear gauge helps you determine when your bike chain needs replacing. It is for anyone who wants to check their drivetrain themselves in the workshop or garage.

• Measures chain wear across 10 links, with a measuring range from 0 to 1.2 %
• Tells you when to replace: below 0.6 % for up to 10-speed, below 0.5 % for 11 and 12
• Made from steel, stays accurate and withstands frequent workshop use
• 137 mm long, easy to handle and store in your toolbox
• Suitable for 1/2" chains, the most common on road bikes, gravel bikes and MTB

Technical specifications

• Type: Chain wear gauge
• Material: Steel
• Measuring range: from 0 to 1.2 %
• Overall length: 137 mm
• Chain compatibility: 1/2"
• Intended use: Checking chain wear, measuring across 10 links
• Replacement threshold: Below 0.6 % for chains up to 10-speed; below 0.5 % for 11- and 12-speed chains
• Package contents: One chain wear gauge
• Manufacturer code: 617170

Unior was founded in 1919 in Zreče, in present-day Slovenia, where it is still based. For bicycle care, it makes tools, repair stands and wheel equipment. Its name, adopted in the 1970s, comes from the expression “universal tools” and reflects its roots in metalworking.