Features:<br />Anodised CNC hined bicycle jockey wheel with fully rubber sealed bearing for center bolt derailleurs.<br />Firm and lightweight.<br />11 teeth bicycle rear derailleur accessary.<br />Made of CNC aluminum alloy・ lightweight and durable.<br />A necessary accessary for your bicycle.<br />Stainless Steel bearing for ultra durability <br /><br />Bearings: Upgraded RS bearing.<br />Type: 11T<br />Fits for all the mountian bike.<br />Material: Aluminum alloy<br />Color: Blue・ Gold・ Red・ BLack・ Silver・Green・Purple<br />Size:  4.3cm/1.8&quot;(dia)・ thickness  8.5mm<br />Hole size: 5mm dia・ radius 42mm<br />Weight: 9g <br /><br />Packing Included:<br />1 x Bike 11 teeth guide wheel