Unior 1658/2P Chain Tooth Wear Indicator

The Unior 1658/2P sprocket wear indicator measures how worn your Shimano HG or IG cassette is. It is for anyone maintaining a bike at home or in a workshop.

• Check sprocket wear by inserting the lever between two teeth
• To take a measurement, apply 10 Nm in the sprocket's direction of rotation
• Chrome-plated steel with a composite handle, 270 mm long and weighing 77 g
• Compatible with Shimano HG and IG cassettes with 12-21 teeth
• Universal size: simply check that your cassette is Shimano HG or IG

Technical specifications

• Material: Premium Flex Plus carbon steel, trivalent chrome-plated to ISO 1456:2009
• Handle: Composite
• Length: 270 mm
• Weight: 77 g
• Compatibility: Shimano HG and IG cassettes, 12-21 teeth
• Intended Use: Measuring sprocket wear, with 10 Nm of torque in the sprocket's direction of rotation
• Package Contents: 1 x Unior 1658/2P sprocket wear indicator

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.