The newest 27.5 inch bike is a bike with a high quality specifications... The Alloy crank provides steady gearing and less maintenance 21-Speed shifters with rear derailleur for quick gear changes on the trail All-terrain, wide knobby mountain tires sit on light and durable alloy wheels for added stability Quick release seat post makes for easy height adjustment الحالة جديد النوع الدراجات الهوائية