quiet bicycle internal gear hub belt drive

{"cid":"91225520","title":"135mm Automatic 3 Gear Hub Belt Drive Internal Gear Hub For Premium E Bikes","imgUrl":"https:\/\/img.chinax.com\/nimg\/48\/c8\/ccd2bd87da4d1396862f1ac49c6a-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"ELEVANDI","Model Number":"LG-N7122-3D","Minimum Order Quantity":"TBD","Delivery Time":"<20days","Gear Range":"166% Total Gear Ratio","Application":"Belt Drive City E-Bikes \/ Premium Commuter Platforms","Shifting Technology":"CentriGear Automatic Mechanical Shifting","Weight":"1.64 kg","Drive Compatibility":"Belt Drive System","Model":"LG-N7122-3D","Shifting Operation":"Fully Automatic Mechanical Shifting","Certification":"RoHS,REACH","Packaging Details":"1pcs\/carton","Product Type":"Belt Drive Automatic Internal Gear Hub","Supply Ability":"Ten thousand sets per month","Brake Interface":"6-Bolt Disc Brake","Payment Terms":"T\/T,PayPal,L\/C,D\/A,D\/P,Western Union,MoneyGram","O.L.D. (Over Locknut Dimension)":"135 mm","Place of Origin":"GUANGZHOU,CHINA","OEM Support":"Belt-Line Review \/ Cog Matching \/ Sample Validation","Waterproof Rating":"IPX6"}}

{"cid":"91220287","title":"Wear-Resistant 40Cr Planetary 3-Speed Bicycle Gear Set for Internal Hub Shifting Systems","imgUrl":"https:\/\/img.chinax.com\/nimg\/65\/28\/3f35893df28e719023e6f21623d3-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"DINGSCO","Minimum Order Quantity":"Negotiable","Delivery Time":"(Sample order) 7 days","Certification":"ISO 9001","Place of Origin":"Changsha, China","Payment Terms":"T\/T","Supply Ability":"Negotiable","Packaging Details":"According to customers' requests","Gear Type":"Sun Gear, Planetary Gear, Ring Gear, Drive Gear, Ratchet Gear, Transmission Gear","Common Module":"0.8 \/ 1.0 \/ 1.25 mm","Teeth Number":"Sun Gear 12\u201318, Planetary Gear 16\u201324, Ring Gear 42\u201352","\u00a0Main Material":"45# Steel, 40Cr, Powder Metallurgy","Tooth Hardness":"HRC 48\u201356","Rated Torque":"25\u201360 N\u00b7m"}}