Shimano Tourney TX35 Rear Derailleur (6/7 Speed) By: Shimano Price: $8.33 The Shimano Tourney RD-TX55 6/7-speed rear derailleur features SIS shifting and is mega range compatible with an advanced light action design.
Shimano Tourney TX55 6/7 Speed Rear Derailleur By: Shimano Price: $9.10 Shimano Rear DerailleursAdvanced light-action designTX models come with Smart Cage which gives MegaRange compatibility with a shorter derailleur cageItem SpecificationsIntended UseMountainCassette Spacing6-Speed,Shimano/SRAM 7Shifter/Derailleur Compatibility
Shimano Altus Mountain Bike Rear Derailleur - Direct Mount - RDM310 By: Shimano Price: $23.99 Wide link design increases durability and precise shifting. 7/8 speed design. 13t guide pulley and 15t tension pulley for long wear. Max sprocket: 34t. Top-Normal (standard action) return spring.
SRAM X.4 Rear Derailleur (Black, Long Cage) By: Sram Price: $23.00 The SRAM X.4 line-up sets the standard for recreational level shifting. The X.4 has an intelligent blend of performance and value for MTB or pavement. Compatible with 7-, 8-, and 9-speed systems, 1:1 shifter-to-derailleur actuation ratio for precise light-action indexing. Must be used with ESP shifters.