TA Specialite Syrius chainring

The outer TA Zephir chainrings with a 110mm bolt circle are compatible with road bike compact cranksets. These chainrings have a symmetrical 5-hole/arm mounting and are not compatible with new asymmetrical crank mountings

Compatible with 9-, 10- and 11-speed MTB and road bike cranksets:

The standard chainrings are designed for 9-speed chains, but can also be used without any problems with 9-, 10- and 11-speed chains and cranksets. On the crankset, the spacing between the chainrings is determined by the crank arms. Therefore, it does not matter whether you use 9-speed, 10-speed or 11-speed chainrings.

Please note that the gap between the individual chainrings should not exceed 12 teeth. Otherwise, you will have to accept a reduction in shifting performance. For chainring setups with the largest chainring from 46 teeth upwards, please use Shimano XT front derailleurs with a compatible cage. Road bike front derailleurs generally shift up to 55 teeth without any problems.

To determine the bolt circle diameter, please measure the distance between two adjacent holes (centre-to-centre) and multiply this value by 1.7. This will give you the bolt circle diameter.

Herstellerinformation: Spécialités T.A., 41 bis rue de Laon, 02150 Sissonne, France, https://specialites-ta.com/