Storage Capacity: 0.75? L compartments: padded main compartment; Material: 420? Denier nylon/PVC, fixing: Nylon Straps; Head Tube Diameter: 34? -? Diameter 75? mm? -? Outer pole diameter: 38? -? Diameter 52? mm; Additional Features: Perfectly suited for: Mobile phone/smartphone/Energy Bars/Wallet/Tools; Size (L x W x H): 24? x 7.5? x 11? cm, Weight: 150? g