These are the thomson downhill alloy 318mm riser handlebars great fit the classic thomson look the most precise steering bar available 780mm wide 6 degrees of backsweep and 4 degrees of upsweep built using 7050 aluminium alloy for strength and long life 65mm wide clamping area to fit thomsons direct mount stem giving you the most torsional stiffness of any barstem combination centre section is 99mm wide to move the bending point to the optimal location 4 separate butting steps ensure