Middleburn XTR M960 fits 146 BCD Outer – 102BCD Middle – 64BCD Inner chainrings and are designed for Shimano M960 XTR cranks.
Middleburn XTR M970 fits 104 BCD and 64 BCD chainrings. These chainrings have been designed for the Shimano M970 XTR cranks.
All Middleburn chainrings have been machined from aerospace grade 7075 T6 aluminium and are hard coat anodised for greater strength and resistance against wear and tear. Middleburn components are all designed and manufactured in the UK.