{"id":52629,"date":"2020-03-30T16:56:05","date_gmt":"2020-03-30T21:56:05","guid":{"rendered":"https:\/\/www.texbiker.net\/blog\/?p=52629"},"modified":"2020-03-30T16:56:10","modified_gmt":"2020-03-30T21:56:10","slug":"gear-inches-conundrum-getting-two-bikes-shifting-closer","status":"publish","type":"post","link":"https:\/\/www.texbiker.net\/blog\/2020\/03\/30\/gear-inches-conundrum-getting-two-bikes-shifting-closer\/","title":{"rendered":"Gear Inches Conundrum, Getting Two Bikes Shifting Closer"},"content":{"rendered":"\n

Waiting for the weather to resemble the forecast I started thinking about why my two road bikes gears produced very different shifting combinations. This makes riding and selecting the gear combinations to use with a given cadence to go a certain speed challenging. My desire is to select gears in a similar sequence to ride at similar speeds.<\/p>\n\n\n\n

My Lynskey R300 bike’s 52×40 chainrings teamed with a 11×34 rear cassette and 700×33 tires produce speeds different from the Canyon Endurace’s 52×36 chainrings and 11×25 cassette turning 700×28 tires. To compare these setups I turned to gear inches. From Sheldon Brown’s Glossary<\/a><\/strong>: “One of the three comprehensive systems for numbering the gear values for bicycle gears. It is the equivalent diameter of the drive wheel on a high-wheel bicycle. When chain-drive “safety” bikes came in, the same system was used, multiplying the drive wheel diameter by the sprocket ratio. It is very easy to calculate: the diameter of the drive wheel, times the size of the front sprocket divided by the size of the rear sprocket. This gives a convenient two- or three-digit number.” The Lynskey and Canyon current gear inch charts.<\/p>\n\n\n\n