Sturmey Archer hub Color: silver Material: Aluminum - Number of holes: 36 holes - Type: X-RDC - Weight: 950 grams - Mounting width: 135 mm - Wave length: 185 mm - Suitable for 8/9 Speed cassete - Suitable for 70 mm drum - Suitable for 13 & 14 G spokes - Suitable for 16-22 T - Includes necessary components