SRAM Unveils X1 1×11 Drivetrain

by Brian Mullin on July 2, 2012

SRAM teased us earlier in the year with the X1 system, which is the
name of their new 1×11 drivetrain technology. Today they released the
full spec’s on the high-tech system.

The system will be available
in the October 2012 time frame, although pricing is still unknown? The
XX1 group has an innovative Type2 X-HORIZON rear derailer, a huge
10-42T cassette, a carbon armed crankset with a wide array of chainrings (28-30-32-34-36-38) chainring, and trigger or grip shifters. The cassette is currently only compatible with SRAM and DT Swiss wheels.

XX1 was built with a dedicated 1X drivetrain philosophy—making it
simpler, lighter and more durable than any other. No matter where you
ride, no matter what you’re up against:

by a cutting-edge, single-ring carbon crank and seamless component
integration, SRAM 1X drivetrain delivers flawless chain management and
faster, more precise shifting. But the relationship between XX1
components goes far beyond fitment. From the X-HORIZON™ rear derailleur
with TYPE 2 technology to the super wide range 11-speed 10-42T cassette,
each component is designed to function synergistically with the others,
achieving what no other 1X drivetrain has before.

Available October 2012

Developed for maximum chain control, each tooth’s thickness is
precisely CNC-machined to support the chain’s inner and outer links
perfectly. Six available chain rings (28-30-32-34-36-38) allow you to
tune your gear range to match your terrain, wheel size and riding style.
Each X-SYNC™ chain ring fits a single, universal spider—allowing you to
change rings without removing the light-weight carbon crank arm.

  • New tooth profile alternates thickness by inner and outer links, providing maximum chain control
  • Carbon arms with forged aluminum spider
  • CNC-machined rings (28-30-32-34-36-38)
  • New spider design allows for easier ring changes
  • Wide/narrow Q factor cranks for BB30 and GXP
  • Weight: 650 grams with BB (approx.)

A CNC-machined, “wide tooth, narrow tooth” pattern is repeated around
the entire chainring, perfectly mirroring the chain’s inner and outer
links for maximum control.  

Besides serious
weight savings, this bottom bracket means narrow Q-factor, more ankle
clearance, greater bearing durability and stronger crank construction.  

GXP’s Gutter Seal design cuts friction, durability and weight—improving both feel and performance.

X-HORIZON Rear Derailleur
With its “horizontal parallelogram” design and pulley offset,
X-HORIZON™ keeps the chain gap constant across all 11 gears, providing
fast, precise shifts. By limiting all movement to the horizontal axis,
this design is faster, reduces shift force and eliminates ghost
shifting. ROLLER BEARING CLUTCH™ technology reduces bounce and chain
slap. CAGE LOCK™ technology makes wheel removal and installation easier
than ever before. Paired with the XX1 shifter, the X-HORIZON RD forms
the backbone of X-ACTUATION™ technology for unbelievably smooth shifting

  • Large upper pulley offset automatically adjusts chain gap
  • Straight parallelogram design with horizontal movement reduces shift force and improves drivetrain performance
  • 12T X-SYNC pulley wheels
  • New silent pulley tooth design
  • Weight: 220 grams (approx.)

This rear derailleur’s “straight parallelogram” design limits all
movement to the horizontal axis, which makes ghost shifting impossible
while also reducing shift force. For quicker, more exact shifting, the
large upper pulley offset design maintains a constant chain gap across
all gears.

Developed specifically for SRAM XX1, X-ACTUATION keeps shifting sharp and consistent across the entire 10-42T cassette.

A “wide tooth, narrow tooth” pattern is repeated around the pulley
wheel, perfectly mirroring the chain’s inner and outer links for maximum

With Cage Lock, wheel removal and
installation—as well as chain installation—becomes faster and simpler.
Just pushing the cage forward to create slack and lock it into place.

Roller Bearing Clutch™ technology eliminates derailleur bounce and chain slap without sacrificing precision.

XX1 Cassette
Ranging from 10- to 42-teeth, the 11-speed X-DOME™ delivers an
incredibly wide gear range while maintaining even, optimized steps. The
single-unit cassette combines with the XD™ driver body for a superior
connection to the wheel.

  • 11-speeds (10-12-14-16-18-21-24-28-32-36-42)
  • Bearing design and ratchet mechanism steadied by XD driver body
  • Creates more stable hub connection
  • Gear steps optimized across entire range
  • Wheels equipped for XD driver body available from SRAM and DT Swiss
  • XD driver body is 6-8g lighter
  • Weight: 260 grams

X-DOME technology creates an incredibly lightweight, precise and strong
cassette. The open design aids in mud clearance, giving you cleaner
shifting performance and longer component life.
XD Driver Body
XD is a new cassette driver body design that allows the use of a 10
tooth small cog and provides an improved interface with the cassette.

XX1 Trigger Shifter

  • SRAM 1X11 X-ACTUATION for precise and dependable 11-speed performance
  • Multi-adjustable trigger shifter
  • MatchMaker X compatible
  • Carbon cover and adjustable carbon pull lever
  • Full Gore Ride-On cable system

XX1 Grip Shift

  • SRAM 1X11 X-ACTUATION™ for precise and dependable 11-speed performance
  • SPEED METAL™ shift indexing
  • ROLLING THUNDER™ ball bearing technology
  • JAWS™ lock-on grip technology
  • Carbon cover
  • Full Gore Ride-On cable system

XX1 Chain
XX1 chain represents the latest breakthrough in a long line of precise,
light-weight chains from SRAM. It’s designed to deliver the greatest
strength and reliability to a drivetrain that doesn’t have to make
compromises for front shifts.

  • New 1X11 XX1 specific chain
  • Designed for maximum strength and wear resistance
  • Proprietary link finish provides improved life span
  • 11-speed power lock

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