RaceFace Aeffect R 170mm Bike Crankset – High-Performance MTB Cranks

The RaceFace Aeffect R Crankset RXC137 merges XC efficiency with enduro-grade resilience for mountain bikers seeking both lightness and rugged durability on demanding trails. Engineered for aggressive riding styles without compromising pedaling responsiveness, this crankset delivers unmatched performance whether you’re tackling steep descents or conquering all-day epics on technical terrain.

Crafted from high-strength forged 7050 aluminum alloy, the Aeffect R balances stiffness and weight reduction perfectly—ideal for riders who demand power transfer on climbs while enduring punishing drops and jumps. Its Boost-compatible 24mm EXI spindle interface ensures seamless integration with modern MTB drivetrains across various hub standards (135/142mm standard hubs; 141/148mm Boost; 150/157mm DH), making it adaptable to your bike’s build configuration whether you’re racing cross-country or charging downhill lines.

The standout CINCH system empowers customization by allowing direct-mount alloy or steel chainrings (sold separately) and interchangeable spiders—a versatile upgrade path for riders adjusting gear ratios seasonally or adapting to different trail conditions. This eliminates excess weight while maintaining flexibility for setups ranging from aggressive enduro racing to smoother XC trails.

Designed for precision and control on loose terrain or tight switchbacks, the Aeffect R’s stealth-black finish complements its no-nonsense performance ethos. With a standard 9/16″ pedal spindle and no pre-installed chainrings or spider (enabling buyers to choose their preferred components), it’s tailored for riders prioritizing lightweight efficiency paired with durability in high-stakes scenarios like technical descents or all-mountain adventures.

Why Choose Aeffect R?
| Feature | RaceFace Aeffect R | Competitor Cranksets |
|————————-|—————————–|——————————-|
| Material Strength | Forged 7050 AL | Cast aluminum |
| Hub Compatibility | Standard/Boost/DH | Limited Boost support |
| Customization | Direct-Mount CINCH System | Fixed spider configurations |
| Weight Class | XC-lightweight | Heavier Enduro alternatives |

Whether you’re navigating rocky singletracks or bombing through rough enduro sections, the RXC137 model delivers confidence-inspiring reliability without sacrificing speed—making it a top-tier choice for riders who refuse to compromise between trail agility and downhill toughness.