Affinity Gear Calculation Chart

Calculate the right sprocket-and-chainring tooth ratio for your bike with Affinity's gear ratio calculation chart. Whether you're racing on the track or flying through the streets, it's critical to have the right gear ratio for your needs or your daily route between work and home.

Although online calculators are available, they are not 100% reliable. That's why Affinity has designed a durable and portable plastic gear ratio calculator to take home or to the velodrome to set up the perfect gear ratio for every situation.

Simply rotate the wheel to the size of the crankset you have or will be using, between 47 and 65 teeth, and you will see the gear ratio based on the number of teeth on the sprocket, between 12 and 17, and the size of the tyre you are using. The calculations are based on 700c wheels with a total of 342 combinations indicated in metres and inches.

It was in 2007 in the New York borough of Brooklyn that the brand's journey began. Their first bike was the Lo Pro Track Bike and they have been successful ever since. Each proposal is a tribute to the company's origins: the messengers who rode their bikes around the Big Apple.

So Jason Gallacher, the founder, sought to create a brand that would bring back the classicism he loves (he's been riding bikes since he was nine years old), but adapting it to the needs of users like you who won't just accept more of the same.

The brand sells four different models of bicycles designed for different activities. In addition, it also markets rims, pedals, chains, freewheels, toolboxes, stickers and even accessories such as caps.

Those who have tried their bicycles, whether for cycling competitions or day-to-day use, confirm that it is a light, easy-to-ride and always perfect product that adapts to any type of use with greater ease.