12T 14T 16T Guide MTB Road Bike Ceramic Pulley Rear Derailleur Ceramic Bearing Jockey Wheel For Shimano Sram GX xx1 Bicycle Part Bike Ceramic Bearing Pulley Rear Derailleur 12T 14T Road Bike Guide Roller Idler 4mm 5mm 6mm For shimano sram GX XX1 Jockey Wheel Bike Part _x000D_ _x000D_ Feature: _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ it is cnc machined by AL 7075-T6 round rod ,finished machined by diamond cutter,with diamond metal texture and good abrasion resistance index , it adopts imported Japanese steel bearing,rotating without resistance ,it greatly decreased frictional resistance,and increased cycling efficiency, the design inreased bike derailleur shifting speed ,it causes no noice when shifting speed k and prevent bike chain falling . _x000D_ _x000D_ _x000D_ Product Name: Jockey Wheel Bicycle Rear Derailleur Pulley _x000D_ _x000D_ Size:12T,14T,16T,18T _x000D_ Adapt to the bike speed: 7/8/9/10/11/12 speed _x000D_ Acrew axis:Fit for 4/5/6 MM roller screw axis _x000D_ Body: 7075 aluminum alloy _x000D_ Diameter:50mm(12T),55mm(14T),68mm (16T),77mm (18T) _x000D_ Bearing:ceramic bearing ,stainless steel shell , more durable _x000D_ Copper Bushing , Resistant _x000D_ Color: red black blue gold Green _x000D_ Net Weight: approx 14.9g _x000D_ Apply for most of rear derailleur on the market _x000D_ _x000D_ Package: _x000D_ _x000D_ Narrow-Wide teeth Rear Derailleur pully *1 pcs _x000D_ Copper Adapter * 2 pcs(4mm,5mm) _x000D_ 1>Stainless Steel Shell ,more durable , compared with nylon shell , nylon shell is easy to break after 100 miles travel _x000D_ 2>Narrow Wide Teeth Design, Prevent the horizontal swing of the chain _x000D_ 3>Copper Bushing ,High Hardness ,Improve Life Time 16T For _x000D_ (1) Shimano 8800RD--6800 6870/6770/9000/9070, _x000D_ (2) Shimano 8700RD--5800/5700/4600/4700/105/6600, _x000D_ (3) Shimano RD--R8000 etc., _x000D_ 18T For Shimano R7000/R8000/R8050/R8070/R9170/R9150/R9100 etc., _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ .aeplgcon {_x000D_ position: fixed;_x000D_ top: 35%;_x000D_ right: 5px;_x000D_ background: #000000ad;_x000D_ color: #fff;_x000D_ z-index: 9999999;_x000D_ width: 190px;_x000D_ }_x000D_ _x000D_ .aeplgcon p {_x000D_ padding: 10px 0;_x000D_ margin: 0;_x000D_ line-height: normal;_x000D_ text-align: center;_x000D_ font-size: 16px;_x000D_ background: #FF5959;_x000D_ }_x000D_ _x000D_ .aeplgcon ul {_x000D_ text-align: left;_x000D_ padding-left: 0;_x000D_ margin-left: 0;_x000D_ margin-bottom: 0;_x000D_ overflow: hidden;_x000D_ }_x000D_ _x000D_ .aeplgcon ul li.nav {_x000D_ padding: 0 15px;_x000D_ border-top: 1px solid #595959;_x000D_ }_x000D_ _x000D_ .aeplgcon ul li.nav:hover {_x000D_ background: #00000059;_x000D_ }_x000D_ _x000D_ .aeplgcon ul li a {_x000D_ color: #fff;_x000D_ padding: 10px 0;_x000D_ display: block;_x000D_ font-size: 13px;_x000D_ }_x000D_ .aeplgcon ul li.nav.now:before {_x000D_ content: "";_x000D_ position: absolute;_x000D_ color: #fff700;_x000D_ left: 5px;_x000D_ text-align: center;_x000D_ line-height: 36px;_x000D_ font-size: 40px;_x000D_ }_x000D_ .aeplgcon i {_x000D_ font-style: inherit;_x000D_ font-size: 13px;_x000D_ color: #ffc100;_x000D_ line-height: 34px;_x000D_ display: block;_x000D_ }_x000D_ _x000D_ .aeplgcon em:hover {_x000D_ background: #d25353;_x000D_ }_x000D_ _x000D_ .aeplgcon em {_x000D_ font-style: normal;_x000D_ width: 22px;_x000D_ height: 20px;_x000D_ display: inline-block;_x000D_ text-align: center;_x000D_ position: absolute;_x000D_ top: 0;_x000D_ left: 0px;_x000D_ color: #fff;_x000D_ cursor: pointer;_x000D_ font-size: 15px;_x000D_ }_x000D_ _x000D_ .aeplgcon em.showPOP {_x000D_ left: -68px;_x000D_ background: #FF5959;_x000D_ width: 62px;_x000D_ padding: 1px;_x000D_ font-size: 14px;_x000D_ text-align: center;_x000D_ border-radius: 3px;_x000D_ }_x000D_ .sweetAlert.aezsmain {_x000D_ margin-top: -372px;_x000D_ left: 17%;_x000D_ right: 3%;_x000D_ top: 51%;_x000D_ overflow: auto;_x000D_ height: 90%;_x000D_ z-index: 9999999999;_x000D_ width: auto;_x000D_ }_x000D_ .sweetAlertNormal {_x000D_ width: 450px;_x000D_ left: 50%;_x000D_ height: auto;_x000D_ top: 50%;_x000D_ }_x000D_ .aezsmain .chosen-container-single {_x000D_ z-index: 100000;_x000D_ }_x000D_ .aezsmain .chosen-container-single .chosen-single {_x000D_ padding-top: 5px;_x000D_ }_x000D_ .aezsmain .chosen-container-single .chosen-drop .chosen-results {_x000D_ te