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> City Bikes Special Order Catalog > Components > Chain > Chain Retention Systems > Chain Retention System > MRP 2x Chain Retention System 39/42T BB Mount Black


2x Chain Retention System 39/42T BB Mount Black (CH1682)


This item is currently unavailable.

The 2x chain guide provides robust chain retention and chainring protection for 2x10 and 2x9 drivetrains.
  • Patent-pending dual pulley design provides precise chain engagement while reducing noise and drag
  • Raised top fin profile prevents the chain from dropping to the BB shell
  • Integrated skid protects chainrings and glides over rocks and obstacles
  • Modular skid saves 40g when removed
  • Compatible with 9 and 10 speed drivetrains
  • Alloy backplate
  • Compatible with traditional threaded bottom brackets only
Item Specifications
Max Tooth42
Chainguide Mount TypeBB Cup Mount