SRAM X5 Medium Cage 9 Speed Rear Derailleur BSS-000237 shop-quality aprons are made of

shop-quality aprons are made of heavy 7-ounce poly cotton twill for comfort and durability

Upper Construction: One-piece Synchwire upper with thermo-bonded exo-structure

Average Weight: 438g pair

They're well known for manufacturing quality

Trick Stuff®

SRAM X5 Medium Cage 9 Speed Rear Derailleur BSS-000237 shop-quality aprons are made ofAbout SRAM X5 Medium Cage 9 Speed Rear Derailleur Leveraging the legendary history of SRAM shifting, the X5 rear derailleur provides incredible shifting speed and precision EXACT ACTUATION technology eliminates slop and shifting variation. Features DIRECT ROUTE technology for lighter effort shifting 34 tooth cassette compatibility Technology 1: 1: 1: 1 Actuation is superior by design. Every unit of cable you pull moves the derailleur the same amount.