51cm 700c mountain bike for gravel grinder

{"cid":"91200885","title":"24 Speed 700C Mountain Bike For Gravel Grinder High Modulus Carbon","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/91\/9e\/657d83a755239b13db1f58951991-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"TWITTER","Model Number":"GRAVEL RETROSPEC(SENSAH)-24S","Minimum Order Quantity":"10PC","Delivery Time":"7-15 working days","Certification":"CE RoHS REACH ISO9001","Place of Origin":"CHINA","Payment Terms":"T\/T, L\/C, D\/A, D\/P, T\/T, Western Union, alipay","Supply Ability":"30000pc per month","Packaging Details":"1.Foam plastic packaging,carton packaging outside.2.Size: 140cm*75cm*20cm.One bike into per carton.3.Container size:290-296pcs into a 40HQ container.120-125pcs into a 20GP container.","Frame Material":"High modulus Carbon Fiber","Size":"45cm \/ 48cm \/ 51cm \/ 54cm","Color":"Red \/ Black \/ BlackRed \/ BlackSilver \/ BlackYellow \/ DarkGray \/ CementGray \/ Blue \/ Yellow, Holographic color(Black \/ Silver \/ Black \/ Yellow)","Finish":"Gloss,UV colorful decals","Process":"XC,EPS,Inner-Cable","Derailleur":"RETROSPEC(SENSAH)-24S, carbon handle","Brake":"Zoom,flat-mount&cable pull Hydr(metal radiator)+PRO float disc 160\/140","Wheels Material":"Alu alloy","Tire":"700*40C"}}