The V-Drive Low Riser gives you the performance you need at an affordable price 2014-T6 aluminium tubing is double-butted and tapered to put metal where it�s needed for strength but keep it to a minimum elsewhere for low weight 9? back sweep and 4? up sweep with 15mm rise put you in position for maximum control 31.8mm 740mm 15mm 4? 9? Black Mountain Riser AL2014UPC/EAN/GTIN: 840031053985