The rotor is made of steel and the adapter material is aluminium, with an adapter weight of 34g(180mm)/37g(203mm). The brake type is a disc brake and the model is SM-RT56.

Compatible Brand: Shimano
Position: Front / Rear
Item Diameter: 180mm
Set Includes: Rotor
Material: Steel
MPN: SM-RT56
Item Length: 18cm
Mounting Type: 6 Bolt
Adapter Weight: 34g(180mm)/37g(203mm)
Colour: Silver
Brand: Shimano
Brake Type: Disc Brake
Model: SM-RT56
Compatible Bike Type: City Bike, Cyclocross Bike, Dirt Jumper, Downhill Bike, Fat Bike, Folding Bike, Mountain Bike, Touring Bike, Trekking Bike
Adapter Material: Aluminum
Number of Items: 2
Part Type: Brake Rotors