Dimension Chainrings. Features: No ramps, pins, or shift aids Multipurpose chainrings for multi-speed or single speed Compatible with 3/32" chains Specifications: Chainring Shape: Round Drive Type: 1x, 2x, 3x, or Single Speed Speed Compatibility: 8 Speed, 9 Speed, 10 Speed, Single Speed (3/32") Chainring BCD: 74mm, 94mm, 104mm, 110mm, 130mm Mount: 4-Bolt or 5 Bolt Material: Aluminum Color: Black/Silver Weight: -