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Note: When purchasing, you can contact the customer service to inquire whether there is any inventory to ensure that it is sent to you in the first time. Thank you for your support of seaboard brand Instruction： Brand ： SEABOARD Model ：GR02 Color ：Grey / Green / Black / Cement ash / Pearl white / Bianchi / Blue Purple / Black Grey / Orange Material ： 6061 T6 Aluminum Alloy +Carbon Top tube ：28.6mm Seatpost : 27.2mm BB :BSA68mm Headset ： 41.8-52MM Weight ：about Frame 44/1584G,47/1614G,50/1644G,53/1674G,56/1704G + Carbon fork507g Size ：700Cx440/470/500/530/560mm Wheel size : 700x42C Suit for height ：(1.)44CM---145-160cm （2.）47CM --- 160-170cm （3.）50CM---170-180cm. （4.）53CM---180-185cm（5.）56CM--185-200cm （6.）59CM---195-220CM Introduction to frame features: Gr02 is positioned as gravel gravel off-road flat mounted disc brake cylinder axle highway frame, compatible with tires within 42C, and the front fork is carbon fork cylinder axle. 6061 T6 aluminum alloy heat-treated fine drawing pipe is adopted as the pipe material, and the large diameter drawing pipe of lower pipe 48 is re profiled. Refer to the design of Columbus / HSS pipe, the welding area of head pipe and tee is increased, and the strength is better. The head pipe is 41.8-52mm (hidden bowl group), with novel appearance and compression design. The head pipe is lengthened, which makes the whole vehicle feel more atmospheric. The lower fork is a bold design with 24 pipe diameter to enhance the stepping force at the tee, The lower fork at the rear hook is a runway design, which is more modern. The rear fork is a cylinder shaft 142 flat mounted disc brake, and the variable speed disc brake is internally wired.