AH-BS5-BK Boost Hub Adapter for Front 15mm x 100mm Hub to 15mm x 110mm. 6061 Aluminum Alloy Front Hub 0.6 x 3.9 inches (15 x 100 mm) / Fork 0.6 x 4.3 inches (15 x 110 mm); Thickness: 0.2 inches (5 mm); About the products color and size may differ from the actual product depending on your display. Product specifications, logo design, etc. may be subject to change for product improvement. We also cannot answer measurements or personal fit that the manufacturer does not announce. Please be aware of