172.5mm 53/39T BB30 Specialized S-WORKS Quarq Power Meter Crankset Length: 172.5mm Chainrings: 53/39T (SRAM Powerglide) Spindle diameter: 30mm (BB30) Condition: Chainrings exhibit wear. Power meter functions perfectly. Crankarms exhibit signs of wear from shoe rub. Please refer to our photos to ensure personal satisfaction prior to purchase.