Ramps on big rings are specially configured for combinations: 50/34, 52/36, 52/38, 53/39T.
Remember when selecting your chainring sizes - it's not about what others use, but about ensuring YOUR ability to maintain a comfortable and effective cadence across the terrain you ride most often. If you ride chainrings that are too large (round or oval), your cadence will be lower. This can affect your performance by prematurely tiring your legs and possibly lead to stress injury in your knee joints.
Most CX riders choose 38T as most versatile option. If you feel strong try bigger size.
Get one of our premium Oval chainrings Today and use it for 30 days... If you're not delighted with your purchase and feeling the benefit in your legs, then we'll exchange your oval for a round chainring free-of-charge.
Our studies show up to 9% increase of Force effectiveness, up to 7% less oxygen consumption, up to 15% less Ventilation (breathing) and up to 10% heart rate decrease when using oval chainrings versus round. It means it's simply easier to ride with Oval.