Shimano TL-CN42 Chain Wear Indicator
Product information "TL-CN42 Chain Wear Indicator"
The Shimano TL-CN42 chain gauge allows you to measure wear accurately. It’s quick and easy, and works in a unique way. The gauge measures the chain length without any gap between the rollers and the pins by guiding the rollers in the same direction.
Features - Shimano TL-CN42
- High precision thanks to laser cutting
- Unique 3-pin design enables accurate measurement
- Heat-treated stainless steel
- Compatibility: HG-EV, HG-X, HG, IG, UG chains
Application
- Measures the wear on Shimano chains accurately, easily and quickly
Note: A worn chain does not achieve the original SHIMANO shifting performance and causes sprockets and chainrings to wear out more quickly!
Material
- Stainless steel
Contents
- 1 x Shimano chain gauge TL-CN42

Just as important as components: professional tools
A bicycle consists of a wide variety of components. To ensure that each component performs to its full potential, it is essential that it is perfectly maintained. High precision, user-friendliness and a consistent design are essential for repair and maintenance tools. That is why we at SHIMANO remain committed to developing high-quality tools. We develop our professional tools not only for SHIMANO products, but also for the maintenance of bicycles in general. SHIMANO tools are designed to fit SHIMANO components perfectly. The tooth profile of the removal tools corresponds exactly to the dimensions of the components, taking into account any possible tolerances.
- Manufacturer number: Y12160000
- EAN: 4524667988496
- UPC: 689228988491
3-77 Oimatsu-cho, Sakai-ku, Sakai-shi
590-8577 Osaka
Japan
https://www.shimano.com
High Tech Campus 92
NL-5656 Eindhoven
Netherlands
[email protected]
https://www.shimano.com
Shimano TL-CN42 Chain Wear Indicator
The Shimano TL-CN42 chain gauge allows you to measure wear accurately. It’s quick and easy, and works in a unique way. The gauge measures the chain length without any gap between the rollers and the pins by guiding the rollers in the same direction.
Features - Shimano TL-CN42
- High precision thanks to laser cutting
- Unique 3-pin design enables accurate measurement
- Heat-treated stainless steel
- Compatibility: HG-EV, HG-X, HG, IG, UG chains
Application
- Measures the wear on Shimano chains accurately, easily and quickly
Note: A worn chain does not achieve the original SHIMANO shifting performance and causes sprockets and chainrings to wear out more quickly!
Material
- Stainless steel
Contents
- 1 x Shimano chain gauge TL-CN42

Just as important as components: professional tools
A bicycle consists of a wide variety of components. To ensure that each component performs to its full potential, it is essential that it is perfectly maintained. High precision, user-friendliness and a consistent design are essential for repair and maintenance tools. That is why we at SHIMANO remain committed to developing high-quality tools. We develop our professional tools not only for SHIMANO products, but also for the maintenance of bicycles in general. SHIMANO tools are designed to fit SHIMANO components perfectly. The tooth profile of the removal tools corresponds exactly to the dimensions of the components, taking into account any possible tolerances.
- Manufacturer number: Y12160000
- EAN: 4524667988496
- UPC: 689228988491
3-77 Oimatsu-cho, Sakai-ku, Sakai-shi
590-8577 Osaka
Japan
https://www.shimano.com
High Tech Campus 92
NL-5656 Eindhoven
Netherlands
[email protected]
https://www.shimano.com
Es tut, was es soll. Klein und fein. Eine gute Alternative zum Messschieber.
The best/most accurate chain checking tool for max. 0.5% elongation, which is the maximum recommended for 11 and 12 speed cassettes. For 10 speed cassettess, I have seen various recommendations, max. 0.5% is on the safe side, but max 0.75% is mentioned by Park Tool. Zero Friction Cycling made a review of many chain checker tools on 3 Feb 2024 (see Youtube), and this tool came out as one of the few ones that measure accurately. This is because it has a insert-two-pins system on on the 'starting side'. This tool can measure only 0.5% elongation, which is good for 11- and 12.speed chains. Park Tool recommends the following: 11-12 Speed: max 0.5%, 10-speed or less freewheel: max 0.75%, Single speed (1-speed): max 1%. The accurate tool is the Park Tool CC-4 (only this one), which can measure 0.5%, 0.75% (but not 1%). Also Pedro's chain checker was accurate. If you want to measure 1% for single speed, only the KMC Digital was accurate. Don't forget to measure the chain elongation at 2-3 places, as the chain elongation is not the same everywhere on the chain.
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