If this is the case, a greater gear selection on a 2x drivetrain allows you to find a more optimal cadence. Last but not least was Campagnolo, who introduced the Ekar groupset in 2020 – featuring a 1x, 13-speed system.Īs opposed to MTBs, gravel riding is more likely to mix in tarmac to your rides. ShimanoGRX was released in 2019 and offers dedicated 1x components for gravel bikes. SRAM led the way with the Force CX1 1x drivetrain and now offers an electronic groupset in the form of XPLR eTap AXS. The “ Big Three” manufacturers all offer sophisticated 1x groupsets for gravel bikes. Gravel bikes are increasingly being designed to run 1x only, but many still offer 2x drivetrains. More space also allows for fewer compromises when considering suspension kinematics, improving features such as rear-suspension design or frame compliance. Pivot points can be made wider, which improves stiffness. More space on the handlebars allows for more straightforward positioning of a dropper post trigger, making the bike more versatile over different terrain.īy reducing the clutter around the front chainring, there are more options for pivot-point placement.
The omission of the front derailleur also allows greater creativity with frame design. Most mountain bike manufacturers have fully adopted 1x systems due to the simplicity of the single chainring setup. SRAM was the first to design 12-speed drivetrains with its Eagle drivetrain ecosystem in 2016. The 1x drivetrain MTB combo has existed for many years, with 1x popularity surging when SRAM introduced its 1×11 XX1 groupset in October 2012. 1x Drivetrains on mountain, gravel, and road bikes 1x Drivetrain Mountain Bikes One way this is achieved is by using alternating narrow-wide teeth on the chainring, meshing with the chain, allowing it to be better retained. Many 1x drivetrains focus on increasing chain retention, reducing the chance the chain will fall off while riding on bumpy terrain.
With the removal of the front derailleur, the need for the derailleur shifter also goes, freeing up space on the handlebars. A more comprehensive cassette ensures you have an adequate gear range for those more strenuous climbs without additional chainrings. To mitigate the loss of gear range, bikes with 1x drivetrains feature a wider-range cassette. On a 2x setup, the inner chainring usually enables the rider to enter into an easier gear with fewer adjustments than would be required on a 1x setup.ġx drivetrains only have one chainring, eliminating the front derailleur. Having additional chainrings allowed bikes to offer the rider a more comprehensive range of gears with less noticeable jumps between each gear.Ī 3x or 2x system allows riders to fine-tune their gear, giving them the tools to match the resistance of the terrain. Throughout their evolution, bikes have often been equipped with either two or three chainrings, with a front derailleur moving between them. The drivetrain is composed of the mechanical parts of your bike which propel you forward, including:Ī 1x drivetrain features a single chainring (the front set of gears). Let’s take a look! What is a 1x drivetrain?
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