Replacement chains for bicycles are always longer than you need. This video will take you step by step through sizing a bike chain, including determining whether your old chain was correctly sized, sizing to an old chain, and the largest cog & chainring method, as well as some exceptions and considerations such as rear suspension and chain guides.

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See all our chain videos in our chain repair help playlist ▶︎    • Repair Help: Chains  

Video contents:
00:39 Tools Needed
00:57 Check & Remove Chain
02:57 Sizing to Original Chain
04:01 Sizing to Largest Cog & Largest Chainring
06:26 Exceptions & Considerations

➤ Tools & materials used:
• MLP-1.2 Master Link Pliers - http://www.parktool.com/product/maste...
• CT-3.2 Chain Tool - http://www.parktool.com/product/chain...
• CT-4.3 Master Chain Tool With Peening Anvil - http://www.parktool.com/product/maste...
• New Chain
• Marker
• Repair Stand - http://www.parktool.com/category/repa...
• See all Park Tool chain products - http://www.parktool.com/category/chain


For a text-based walk-through of this process: http://www.parktool.com/blog/repair-h...

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➤ Fix It:
Did you know that Park Tool is the #1 resource for bicycle repair education?
• Visit our YouTube Channel:    / parktool  
• Visit the Repair Help section of Parktool.com: http://www.parktool.com/blog/repair-h...
• Check out The Big Blue Book of Bicycle Repair: http://www.parktool.com/product/big-b...

➤ About Park Tool:
Since our founding in 1963, Park Tool has been the leading name in bicycle tools. Our YouTube channel is an extension of our mission to be the ultimate resource for mechanics and riders of all skill levels. Here you will find comprehensive repair help tutorials for a wide range of components and processes, as well as troubleshooting guides, tips and tricks, and information on the latest Park Tool products.

➤ More Chain Repair Help:
• The Park Tool Guide to Chains ▶︎    • The Park Tool Guide To Chains  
• How to Clean and Lube a Bicycle Chain with a Park Tool Chain Cleaner ▶︎    • How To Clean and Lube a Bicycle Chain...  
• When to Replace a Chain on a Bicycle ▶︎    • When to Replace a Chain on a Bicycle  
• How to Fix a Broken Bicycle Chain ▶︎    • How to Fix a Broken Bicycle Chain On-...  
• How to Replace a Chain on a Bicycle - Sizing & Installation ▶︎    • How to Replace a Chain on a Bike - Si...  
• How to Replace a Chain on a Single Speed Bike - Sizing, Installation & Tensioning ▶︎    • How to Replace a Chain on a Single Sp...  
• How to Size a Campagnolo Bicycle Chain ▶︎    • How to Size a Campagnolo Bicycle Chain