Stronglight Osymetric chainring

When using conventionally shaped chainrings, a rider must constantly adjust the force applied during a crank rotation in order to maintain a constant acceleration. The non-circular shape of the O.Symetric chainrings is designed to counteract this. The special shape evens out the force required at different crank positions, enabling a smoother pedalling motion. The result is a smoother pedalling motion, which reduces strain on the rider and frees up capacity for greater power output.

O.Symetric chainrings
have been used in professional cycling for many years; they are not only used in classic road racing or time trials, but mountain bikers and triathletes also benefit from their advantages.

5-arm 130 mm bolt circle

Chainrings with a 130 mm bolt circle are compatible with all 10- and 11-speed cranksets from SRAM and all 10-speed Shimano cranksets. The 130 mm bolt circle is not compatible with Campagnolo cranksets. You can easily determine the bolt circle by measuring the distance between two adjacent chainring bolts and multiplying this value by 1.7.

Stronglight O.Symetric chainring technology:

• Oval shape for optimised pedalling motion
• The dead centre is overcome more easily
• A higher gear ratio is easier to ride
• Chronic knee strain is reduced
• The muscles work more efficiently, as does the cardiovascular system
• Material: CNC-machined 7075-T6 aluminium for greater stability and low weight

Herstellerinformation: Stronglight SA, 11 Rue de Méons, 42007 Saint-Étienne, France, https://stronglight.com/