• Home
  • Box One-E 9S Derailleur

Box One-E 9S Derailleur

MSRP: USD $‎184.99
USD $‎184.99
MSRP: USD $‎184.99
USD $‎184.99

Please select options before adding to cart

Adjustable Tri-Pack Limited Slip Clutch™

The Adjustable Tri-Pack limited slip clutch™ is an innovative chain damper that vastly reduces derailleur cage bounce and chain slap. The system also maintains tension for better chain wrap. At its core is a clutch pack, that is capable of providing a large amount of force in a small package. Clutch force can be adjusted to give the user the ability to tune their setup to the desired balance of shifter feel and chain retention. This version is also serviceable.

Durable 3D Forged Linkages

Impact resistance is greatly improved by way of forging — a key manufacturing process that strengthens critical components. Tested at the premier freeride event of the season — Red Bull® Rampage — this new construction has proven itself capable of performing at the highest level.


Impact resistant, spring-loaded cable stay keeps cable, housing & you out of harm’s way.

Speeds9 Speed
Materials6061-T6 Aluminum, Carbon fiber/Nylon Composite
Shifter CompatibilityBox One™ or Box Two™ 9S-E
PulleysPrecision Sealed Bearing
Minimum Cog11 teeth
Maximum Cog50 teeth
Color/FinishHard Onyx™
Inner & Outer CageForged
Weight288 grams / 10.2 ounces
TechnologyAdjustable Tri-Pack™ Limited Slip Clutch, 3D Forged Linkages, Pivot Tech™

No. Shimano direct mount hangers are proprietary and are not compatible with Box derailleurs.

View & download instructions here: PDF File

View & download instructions here: PDF File