Synchronizer for transmission

A synchronizer for a transmission, comprising:

• a shift rail including a first shift fork and a second shift fork that are provided integrally with each other, the shift rail being movable in an axial direction of a rotating shaft supporting a first gear, a second gear, and a third gear to be rotatable with respect to the rotating shaft;
• a first sleeve engaging with the first shift fork to be driven by the shift rail through the first shift fork, the first sleeve being movable in a first direction along the axial direction from a predetermined first standby position to synchronize the first gear with the rotating shaft, the first sleeve being arranged to face the third gear in the axial direction;
• a second sleeve engaging with the second shift fork to be driven by the shift rail through the second shift fork, the second sleeve being movable in a second direction along the axial direction from a predetermined second standby position to synchronize the second gear with the rotating shaft, the second direction being opposite to the first direction;
• and
• a stopper contactable with the second sleeve to regulate movement of the second sleeve, a distance between the second sleeve at the predetermined second standby position and the stopper in the axial direction being smaller than a distance between the first sleeve at the predetermined first standby position and the third gear in the axial direction.