1、Excellent Material: This speed freewheel is made of high strength steel, using hardening technology, with greater wear resistance, durability, high temperature resistance, erosion resistance, rust resistance, no deformation, high durability. 2、Lighten the Burden of Cycling: This freewheel weighs only 17.5 ounces, the hollowing technology easily reduces weight, which can strike an excellent balance between strength and weight. 3、High Accuracy Tooth Shape: Strong compatibility, excellent impact resistance, bring the riding more possibilities. 4、Easy to Install: Professionally manufactured, direct replacement of old or broken freewheels, is an excellent accessory for mountain bikes and road bikes. 5、Multiple Usages: With different demands for road, gravel, and mountain riding, this speed freewheel can easily satisfy the needs for a variety of riders.