Sram Rival AXS XPLR E1 (42T)

Benchmark Alloy Performance. 13Speed Ready.

The hallmark of the Sram Rival XPLR E1 Crankset is its carefully sculpted aluminum arm architecture. By placing material only where structural load demands it, Sram significantly reduced rotating weight while boosting pedaling stiffness for high-torque climbing and sprinting off the line. Paired with an extended DUB Wide spindle, it provides the wider 47.5mm chainline necessary to clear high-volume gravel tires and integrate seamlessly with modern Full Mount rear derailleurs.

Why the Sram Rival XPLR E1 leads the gravel pack:

• 12 and 13Speed Cross-Compatibility: Fully compatible with both 12Speed and 13Speed Sram XPLR gravel drivetrains, making it an ideal future-proof foundation for modern gravel builds.

• X-SYNC Narrow-Wide Chainring Tech: Direct-mount 1x chainring features tall, square teeth that engage the chain earlier and shed mud effortlessly, offering rock-solid chain retention over washboard roads and rocky singletrack.

• Optimized DUB Wide Spindle: Longer spindle design fits both road-wide and MTB-width bottom bracket standards, accommodating 135mm, 142mm, and Boost rear spacing without compromising Q-factor.

• Proven DUB System Durability: Built around Sram's unified DUB bottom bracket standard for superior bearing sealing, smooth rotation, and simple, hassle-free installation across virtually any frame shell.

• Direct-Mount 8Bolt Interface: Features an 8Bolt direct-mount interface that makes switching chainring sizes simple and allows for easy future upgrades to a spindle-based power meter.

Technical Specifications:

• Drivetrain Speeds: 12Speed / 13Speed

• Drivetrain Configuration: 1x Specific

• Crank Arm Material: Forged & Milled Aluminum

• Spindle Type: DUB Wide (28.99mm Spindle)

• Chainline: 47.5mm

• Direct Mount Interface: Sram 8Bolt

• Chain Compatibility: Sram Flattop (Road / Gravel) & T-Type Chains

The Alegro Perspective: The Rival E1 crankset is one of our absolute favorite recommendations for riders building a modern 1x gravel rig. Sram put a ton of thought into the arm forging, giving it a sleek look that punch well above its price tag. The DUB Wide spindle provides plenty of tire clearance for 50c+ rubber without pushing your feet too far apart, and the direct-mount 8-bolt interface means you can easily swap chainrings or drop in a left-side power meter spindle down the road.

Next-Gen Gravel Engineering. Unbeatable Chain Retention. Drive Your Adventure with Sram.