Dual Synchronizer

First and second gear have dual synchronizers. The use Of a second synchronizer ring means that the effective synchronization area is increased approximately 100% in relation to single synchronizers. Dual synchronization gives considerable improvement in gearshift quality.
The dual synchronizers consist of inner synchronizer ring, cone ring, outer synchronizer ring and synchronizer hub.
The conical surface on the gear wheel is discontinued. Synchronization occurs through both synchronizer rings and the cone ring which is positively fitted to the gear wheel.