Miche Primato Advanced Track Single ChainsetThis stunning chainset is specifically designed for use with your track/single speed drivetrain and to bring you smooth performance. Additionally, it features high-quality anodised 7075-T6 aluminium construction for superb durability and performance when both competing and club riding. Finally, this model's chainring has been put through a total treatment process which guarantees its optimum resistance to wear.Features: Material: Anodised 7075-T6 Aluminium, total treatment Axle: JIS squared Speed: Single speed BCD: 144mm, 5-arm Use: Track; Single speed Weight: 600g (165mm model)Buy Miche Components from Chain Reaction Cycles, the World's Largest Online Bike Store.