1.quality assurance 2.competive price 3.healthy and comfortable 4 ... ten steel, shrinked 19mmhead parts: steel, 8 pcs, 22.2*25.4*27mmB.B. parts: steel cup, 5 pcs, ... bar, 500mm*30mmstem: alloy, 22.2*150mm, minus 10 degreeBrake lever: alloy, left hand, 2 fingers, radiusbrake: alloy, left ... , CPchain: KMC, 1/2"*1/8"chain tighter: steel, 2 pcscrank set: steel chainring, 48T, alloy crank, 170mmrim: alloy, Deep ...