order bynameprice AUTHOR Stem ACO-ST-011 A-head Rise 10°. Extension 50 mm. Fork steerer tube diameter 28,6mm. Handlebar bore diameter 31,8mm. Weight 227 g. Material AL6061-T6. AUTHOR Stem ACO-ST-009 A-head Rise 35°. Extension 90 or 110mm. Fork steerer tube diameter 28,6mm. Handlebar bore diameter 25,4 or 31,8mm. Weight 160g (for e. 110mm). Material ... AUTHOR Stem ACO-S Respect X7 Rise 7°. Extension 80, 100 or 110mm. Fork steerer tube diameter 28,6mm. Handlebar bore diameter 25,4 or 31,8mm. Weight 125g (for e. 100mm). Material ... pg. 1 of 11