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.

Bore diameter 104 mm, 4-arm

The 64 mm or 104 mm bolt circle, for Shimano and SRAM 9/10/11-speed drivetrains. CNC-machined from 7075 T6 aluminium. The 104 mm bolt circle is the standard MTB bolt circle. The 104 mm bolt circle is currently the most common bolt circle for 9- and 10-speed MTB cranksets. The distance between the chainring bolts is 104 mm, measured diagonally from centre to centre.

Stronglight O.Symetric chainring technology:

• Oval shape for optimised movement
• 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/