Bicycle Chain Length Calculator Icon Cycling Software
Machinehead Bicycle Software Machinehead Cycling Software
Machinehead Bike Software Machinehead Bicycle Software
Cycling Software Bicycle Chain Length Calculator Icon

Rounding Of Values

If your bicycle has horizontal, or track dropouts then leave the 'Adjustable Chainstay Length' box ticked. In this mode ChainlengthCalc rounds up or down from its calculated shortest possible length value to the nearest whole link either way. The assumption is that you will be able to move the wheel slightly forwards to cope with a rounded down value. A good rule of thumb is 1/2 inch of error due to rounding requires up to 1/4 inch of chainstay adjustment to compensate.

If your bike has vertical dropouts and you haven't got a 'Park chainstay shortening tool' then rounding downwards is a bad idea. So uncheck the 'adjustable chainstay length box' and ChainLengthCalc always rounds upwards to the next whole link value.

See Also
Chain Length Calculator
Bicycle Frame Dropouts
Derailleur Allowances
Fractions To Decimal

GearCalc Pro Bicycle Gear Calculator
Wheel Builders Software
Cyclists Power Calculator
Bicycle Crank Length Calculator
Heart Rate Calculator

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