Shimano XTR FC-M9125-1 Crankset 12-speed Hollowtech II black/anthracite

The XTR FC-M9125-1 crank is completely redesigned and features direct mount chainrings, a special tooth profile for better chain hold and a Q-factor of 174 mm. The FC-M9125-1 has a chainline of 55 mm and is compatible with the available 32Z and 34Z chainrings. Crank arms are available in 165, 170 and 175 mm lengths.

HOLLOWTECH II
The concept of HOLLOWTECH II technology was designed to produce an optimised crankset that minimises the amount of effort the rider has to put into the drive. The high stiffness of the crankset ensures the efficiency of power transmission when pedalling, while its low weight relieves the rider, especially on longer distances. The crankset was developed with an optimal balance between stiffness and light weight in mind. The HOLLOWTECH technology allows for extremely light, hollow crank arms that are manufactured using SHIMANO's exclusive forging technology to achieve maximum stiffness. In addition, the HOLLOWTECH II crankset has the right crank firmly connected to the axle of the bottom bracket, achieving an optimal balance between maximum stiffness and minimum weight. The externally mounted bottom bracket offers better weight distribution and more stability, which ensures more efficient power transmission. When developing the HOLLOWTECH II crankset, emphasis was placed on achieving an optimal balance between stiffness and rotational efficiency as well as low weight and an attractive appearance.

DYNAMIC CHAIN ENGAGEMENT+
SHIMANO's DYNAMIC CHAIN ENGAGEMENT+ is a special tooth profile for single chainrings used in XC, Enduro and Trail.
It improves chain retention and guidance and makes pedalling easier even in rough terrain. The improved chain guidance in each gear reduces abrasion and wear.