- The PM-PM +40 mm brake adapter makes it possible to enlarge the brake disc by 40 mm - Example: Post Mount (PM) mount, which is designed for a 160 mm brake disc, allows a 200 mm disc to be installed - Material: Aluminium - Use on the front wheel - Weight: 23 g PM brake mount 160 mm + PM-PM +40 mm adapter = brake disc size 200 mm PM brake mount 180 mm + PM-PM +40 mm adapter = brake disc size 220 mm PM brake mount 203 mm + PM-PM +40 mm adapter = brake disc size 243 mm