The Traction Chainring from OneUp is available for many standards, we tested the cinch version for Race Face cranks. The direct mounting on the crank saves weight and looks tidier. The blade weighs 62 grams with 32 teeth (alternatively also available with 30 or 34 teeth) and costs 65 dollars.
The Canadians promise: With the ovality of the chainring, the torque on the rear wheel should be more even than with a round sprocket. This should make it possible to climb much more demanding uphills. And indeed: We had less wheelspin with the oval ring than with a conventional round ring. Almost a matter of course: the narrow-width profile, which is designed to prevent the chain from jumping off. The chain never jumped off during our tests.
However, the actual reason for buying is likely to be a different one for many: The single-speed drivetrains - with the exception of the Sram Eagle with twelve sprockets - limit the range. Either you do without a fast gear or you struggle uphill. This is where the oval chainring can help: The pedalling motion is much smoother at very low pedalling frequencies and appears more rounded. This can minimise knee problems and protect the joints in the long term.
Test summary of the OneUp Traction Chainring
The oval chainring from OneUp impresses with its function and durability. Even after several kilometres and various impacts, the sprocket remains unimpressed apart from the colour. Whether you like the oval shape is a matter of taste. That's why we recommend Take a test ride!
