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  • Park Tool Master Chain Tool - CT-4.3
  • Park Tool Master Chain Tool - CT-4.3 Detail
  • Park Tool Master Chain Tool - CT-4.3 Detail
  • Park Tool Master Chain Tool - CT-4.3 Detail
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Park ToolMaster Chain Tool - CT-4.3
Sale 5% Off$63.60$66.95

Item # PAR0285

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Item # PAR0285

Professional piece of mind.

Chains are the lifeblood of your drivetrain. Without one, you have nothing more than a glorified hobby horse. And when they break, it's typically due to sloppy installation. When a professional mechanic installs a chain, it's with a precision unit like this Park Tool CT 4.3 Master Chain Tool for a reason.

Field service and home mechanic tools work great in a pinch, but if you want to avoid the pinch altogether, the only way to go is professional grade. Aside from the obviously ergonomic handle, the CT 4.3 works with the tight tolerances of modern, narrow chains due to its investment-cast, precisely machined body.

This ensures that the tool's pin is guided straight, and that it doesn't wander while installing the chain pin. Otherwise, wallowing of the bore, binding inside, or bending of the plates will happen. Additionally, the pin is easily replaced if it happens to bend. Another defining feature of the Master Chain Tool is an integrated link pocket for precise alignment during use.

The Park Tool Master CT-4.3 Chain Tool is compatible with Campagnolo chains, and includes an anvil to peen their 11-speed chains. It will work with all 5- through 11-speed chains from Shimano and SRAM, as well. Please note that the only chain that it's not compatible with is Wipperman.

Tech Specs
Tech Specs
5- to 11-speed chains, Shimano, SRAM, Campagnolo
Recommended Use
chain service
Manufacturer Warranty

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Buy it!

    Come on guys, if you own a $3-10K high-end road (or MTB) bike with an 11 speed chain, spend only ~$20-30 more than a decent/inferior chain tool and purchase Park's CT-4.3 master chain tool.

    Park's CT-4.3 is designed in a different and superior way than other chain tools (even Park's 3.2). It holds the chain *inside* the block; much more secure. Thus, the chain rivet is driven-in in a more precise and accurate way. Therefore, fewer bent, stuck, or stiff links (so frustrating!).

    Buy this chain tool and Park's $10 chain checker (3.2), and change your chain --easily-- and as needed. (About every 1,500-3,000 miles depending upon conditions.)

    Park Tools

    • Familiarity: I've put it through the wringer

    Great for any home mechanic looking to build a good tool set for working on their bikes.

    Not your average tool

      The large handles make this tool the one to get. The additional leverage this tool affords you makes removing and setting pins real easy.