I just tried fitting slightly bigger bars but the clamp size is too small, someone remind me what the clamp area size is as 25.4 too small, then tried brooks plump donut grips but thd amoung of rings removed is way past the threaded area due to the stupid long sram x4 grip shift area so thats been a wasted hour in the shed and now no grips as cut old ones off as too poor a shape, so now csnnot ride the bloody thing unless i find thd correct grips, swap the twist shift for sram x4 trigger shift then i can use my brooks grips but still need higher bars, always something to spoil my day so i think i will do the trigger shift option as hate twist shift then get bars later when i have some cash as may need longer cables depending on height/sweep.