Welcome to our store！</br> 1、The inner width of the front fork that is suitable for opening before 0.L.D is opened is 100mm/3.9in. 2、After the O.L.D is opened, the inner width of the applied gear is 135mm/5.3in, and the center distance of the disc to the hole is 44mm/1.7in. 3、In all conditions and situations, a bicycle with a good drum sound can ride faster than a bicycle with a bad drum sound, which can increase the riding speed. 4、It is an important part of bicycles, and the average speed of riding a bicycle is directly affected by the quality of the hub. 5、The bicycle hub is made of high‑quality and durable aluminum alloy material, and the bicycle hub acts as a connection between the spokes and the axle. <p class="wang-edit-text"><p class="wang-edit-text"> Item Type: Bike 32 Hole Disc Brake Flower Drum Material: Aluminum Alloy Colour: Black Number of Holes: 32 Holes Weight: Approx.904g/31.9oz Product Size: Front Hub Axle Length: Approx. 110x70mm/4.3x2.8in Rear Hub Axle Length: Approx. 150x70mm/5.9x2.8in Center Distance of Disc to Hole: Approx. 44mm/1.7in The Inner Width of the Front Fork That is Suitable for Opening Before O.L.D is Opened: Approx. 100mm/3.9in After O.L.D is Opened, the Inner Width of the Rear Fork is Suitable for Opening: Approx. 135mm/5.3in <style> .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }</style> 2 x Bicycle Hub 1 x Long&nbsp;Release Rod 1 x Short&nbsp;Release Rod&nbsp;&nbsp; Satisfaction - Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactoryaftersalesservice</br>