R438/R439 Front Derailleurs hydration pack you benefit from the rising

you benefit from the rising rate in the last 30% of the GENIE stroke

while a synthetic suede palm combines durability and grip

If unfamiliar with this system of measurement physically measure ERD yourself prior to committing to a spoke length

MasterMind seamlessly integrates with the Specialized app for range optimization tools

R438/R439 Front Derailleurs hydration pack you benefit from the risingA classic design that's backwards compatible with older road drivetrains, the microSHIFT R438 and R439 front derailleurs feature quality construction and modern functionality that provides smooth shifting. Compatible with 9 speed Shimano road drivetrains Designed for use with 52 42 30t chainrings