• Made of quality nylon plastic + aluminum alloy + bearing, it's durable to use
• It has alloy cups, which optimizes bearing load, minimizes drag, keep your cranks turning smoothly
• It is lightweight and compact, convenient to carry

Specification:

• Material: nylon plastic + aluminum alloy + bearing
• Inner diameter: φ24mmx24mm, if matched with the matching reducing ring, it can be compatible with 22~24mm
• Applicable frame: 68-73mm
• Net weight: 92g