Twenty half-links in a new chain measure 10 inches (254 mm), and replacement is recommended before the old chain measures 101⁄16 inches (256 mm) (0.7% wear). A more conservative limit is when 24 half-links in the old chain measure 121⁄16 inches (306 mm) (0.5% wear).
How do I know my bike chain size?
Add the multiplied chainstay length, the divided number of teeth for the chainring and rear sprocket, and add 1 (or 2.5 cm). The result is the ideal chain length for your bike. For example, you’d add 32.5, 13, 7 and 1 to get 53.5. The length of the chain should be 53.5 inches or 135.89 cm.
What size are bicycle chains?
Chains come in 3⁄32 in (2.4 mm), 1⁄8 in (3.2 mm), 5⁄32 in (4.0 mm), or 3⁄16 in (4.8 mm) roller widths, the internal width between the inner plates. 1⁄8 in (3.2 mm) chains are typically used on bikes with a single rear sprocket: those with coaster brakes, hub gears, fixed gears such as track bicycles, or BMX bikes.
One link is two pin-to-pin dimensions. Each pin is 1/2″ from its neighbor, so a full link is 1″ long. When they say the chain is 116 links, they are really saying there are 116 pins, for a chain length of 58 inches.
All modern bicycle chains are made to the “one-half inch pitch” standard, meaning from rivet to rivet is nominally 0.5 inches. … However, this does not mean all makes and models of chains are interchangeable. There are two basic types of bicycle chains: “one-speed” chains, and derailleur chains.
What is the chain length?
The chain is a unit of length equal to 66 feet (22 yards). It is subdivided into 100 links or 4 rods. There are 10 chains in a furlong, and 80 chains in one statute mile. In metric terms, it is 20.1168 m long.
How long should a bicycle chain be?
Using a ruler, a new chain should measure exactly 12 inches across 12 links, from middle of pin to middle of pin. The number most commonly agreed on for a worn chain is one percent elongation between links. In reality though, you want to replace the chain before this point.
How do you measure the width of a bicycle chain?
It is measured by measuring the distance between 3 links, then dividing it by two.
- Chain pitch is shown with green markers, though it is determined by measuring the distance between 3 adjacent pins (blue mark) and dividing it by two.
- Inner chain width, marked with blue arrows and lines.
- From left to right:
What is the difference between 1 8 and 3/32 chain?
A 1/8″ chain is 3.18 mm, and a 3/32″ chain is 2.30 mm. … The 3/32″ chain will be slightly more flexible than a 1/8″ chain, which means it will be a bit happier if your chainline is not very straight. Using a track frame and track style crankset you should not have this problem.
What number chain is on a bicycle?
Bicycle Chains are generally categorized into two types: 1/2 × 1/8 and 1/2 × 3/32. The first number (1/2) is the chain pitch; the latter numbers (1/8 and 3/32, respectively) indicate the inner width in inches.