BSD Zingbars Oversized BarsOversized version pf Liam Zingbergs Signature Zingbars handlebars from BSD. The Zingbars bars feature a 9. 25 rise and are made from multi butted post weld heat treated 4130 for maximum strength to weight ratio. The stem clamping area diameter is increased from 7 8 (22. 2mm) to 1 (25. 4mm). This increase in diameter gives 14% more clamping area than on regular 7 8 handlebars, so when youre nose diving down a 12 set your bars are less likely to slip.