microSHIFT Trail Trigger Right Shifter - 1x9 Speed ADVENT CompatiblemicroSHIFT Trail Trigger Right Shifter 1x9 Speed ADVENT Compatible. The microSHIFT Trail Trigger features the same ergonomic and performance benefits as the Trail Trigger Pro but without the silicon gripter pad. This shifter is well suited for riders with exceptionally tough thumbs who ride in dry conditions. Compatible with microSHIFT ADVENT 9 speed drivetrains only Internal cartridge bearings for light lever throw and positive actuation under load