Ramps on big rings are specially configured for combinations: 50/34, 52/36, 52/38, 53/39T.
- 34T inner chainring should be used with 50T outer ring. It has 6.5% ovality. Use a 34T to help with spinning higher cadence and hilly terrain.
- 36T inner chainring can be used with 50 or 52T outer ring. It has 11.4% ovality. Use a 36T if you’re a strong rider or for rolling terrain.
- 38T inner chainring should be used with 52T outer ring. It has 11.4% ovality. Use a 38T if you’re a very strong rider or for flat terrain.
- 39T inner chainring should be used with 53T outer ring. It has 11% ovality. Use a 39T if you’re a very strong rider or for flat terrain.
- 50T outer chainring – Choose this size if you ride for pleasure or sportive events. This is the most versatile and comfortable size.
- 52T outer chainring - if you race and feel strong, it's the classic outer chainring size and a great option for experienced riders.
- 53T outer chainring - if you race and feel very strong, it's the classic outer chainring size and a great option for powerful riders.
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.
