FAQ: How To Know My Bicycle Chain Ring Size?

Do all chain rings fit all bikes?

Largely speaking, yes. As long as your attempting to replace them with a chainring(s) designed to work with your chainset. Your cranks will have a specific bolt layout or fitment spec so you can’t just fit a BMX chainring to your triathlon bike.

How do you measure BCD chainrings?

Luckily, it’s possible to calculate the BCD of a chainring by simply measuring the center-to-center distance of two adjacent bolt holes. Chainrings: Understanding BCD

  1. For 3-bolt chainrings: “A” = “B” x 1.155.
  2. For 4-bolt chainrings: “A” = “B” x 1.414.
  3. For 5-bolt chainrings: “A” = “B” x 1.701.

What chainring do I need?

Chainring – crank type Single: One chainring in front. Double: The classic set where you can choose between a heavy gear or a small one (53 or 52 and inner chainring of 39t) Compact: Between a triple and a double: 50/34 chainrings. Triple: Offers three choices: large, smaller, smallest.

What is 110 BCD chainring?

Bolt Circle Diameter (BCD) is the diameter of an imaginary circle running through the center of the chainring mounting holes. It is always defined in millimeters.

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How often should I change my bike chain?

The 2,000-Mile Rule. To avoid this accelerated wear of your cassette and chainrings, a general rule of thumb is to replace your bike’s chain every 2,000 miles. Mind you, this is just a starting point. No two chains will wear at exactly the same rate because no two riders treat their chains the same. 4

How do I find BCD?

In many cases the BCD is printed right on the chainring like in the example below. Sometimes it is stamped or engraved on the back side of the chainring. If it is not labeled on your chainring, you will need to measure it. On a chainring with 4 bolts, the BCD is the distance between two bolts across from each other.

What does 130mm BCD mean?

BCD stands for Bolt Circle Diameter. It is the distance from side to side of a circle that goes directly through each bolt hole in a crankset. When you see a measurement like 110 or 130 BCD, that means that diameter is 110 or 130 millimeters, respectively.

What size chainring do pros use?

Pros often use a 55×11-tooth high gear for time trials. On flat or rolling stages they might have 53/39T chainrings with an 11-21T cassette. In moderate mountains they switch to a large cog of 23T or 25T. These days, they’ve joined the big-gear revolution like many recreational riders.

Can I increase chainring size?

Can I Change Chainring Size? Yes yeah can but you cannot just change your current chainring for something that does not work with your current setup. Meaning the new chainring you get for your bike needs to works with your current chainset. Your cranks will have a specific bolt layout or fitment spec.

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What’s the best size chainring?

Broadly speaking, if you ride a 29er and/or ride in steep mountains go for a chainring with 32T or fewer (the 11 speed Sram XX system goes down to 28T if your bike has the XX drivetrain). If you ride 26″ or 27.5″ wheels and/or ride in less mountainous terrain then go for a 34T or possibly even 36T chainring.

What is the smallest chainring for 110 BCD?

The smallest chainring with a BCD of 110 mm is a 33 from TA Specialite.

Does BCD matter?

BCD doesn’t really matter until you get into the taller chainrings. Also you won’t notice any real difference between 165 and 170 unless your on a real level. The power transfer of it is negligible.

What is the BCD of Shimano 105?

Stronglight Shimano 105 FC-5800 Chainring 11-speed, 4-Arm, 110 mm BCD.

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