Road Bike Chain Length Calculator

The correct chain length chain rivet. Methods to determine chain length method 1. I have no idea how the magic number of 0 0796 was derived but the formula appears to provide a pretty good approximation to the shortest possible length of 1 2 inch pitch bicycle chain that will theoretically go around the two cogs on a fixed wheel bike.

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Simplest way i ve heard and used is put the chain on the big ring at the front and the small ring at the rear and pull the chain until the arm of the rear mech is vertical.

Road bike chain length calculator. Chain length sizing for. Too long chain will increase risk of chain dropping while too short chain puts too much stress on the drivetrain or can damage it if it can be put and closed over the chainrings in the first place. Well it s really quite simple the first step is to wrap the chain around the largest sprockets on the front and rear so that the ends meet on the largest front chainring. Chain length calculator does nothing more and nothing less than working out what the length of your chain should be expressed in number of links.

All you need are a chain rivet or a chain lock and you will need to know the amount of chain links needed for a correct chain length. For example some derailleur bike chain could only be 51 52 53 inches etc. You can use either of these two methods. Chains cannot be cut to 52 1 4 53 1 8 or even 52 1 2.

It really isn t too difficult to get the chain length right. To check if it was the correct size shift the bike to the smallest sprockets and check the chain for any slack. Csl chainstay length in inches f front gear cog teeth r front gear cog teeth. It is possible to determine chain length from industrial drive train equations and then cut the chain before installing it on the bike.

When you purchase a new chain it usually comes with extra length so that it is compatible with most drivetrains. Size to old chain count links if your old chain was sized correctly it can be used to determine the length of your new chain. Why is it important to determine correct chain length. You can use cm or inches to input your chainstay length you should always be able to find this out on your bike manufacturer s website inventory or in the manual it came with and then add your outer chainring size and number of teeth.

Chain that is too short can also damage rear derailleur. Built another bike this year and finally got to grips with gears and chain length. Take your old chain and lay it out next to the new one. How do you know how much length your bike will need.