the sram gx1 1400 bb30 170 x-sync 32t red chainsets 2016 cranks sram gx troop perform consistently in every situation. with the toothed sram x-sync gets full control of the chain. each thin and thick tooth is machined on cnc to work optimally with the chain gear. features: -gx 1400 with open core of aluminium technology. -gx 1000 aluminium series 6000. -plates of 7075 aluminum x-sync mechanized cnc anodized 2-tone. developments 30-32-34-36-38. -compatible with pf30, bb30, gxp and press fit gxp bottom bracket. -cubreplato option. -dimensions: 170 mm. -technologies: x-sync.