Race Face
Aeffect R 35 Stem
Best lightweight stem for aggressive trail and enduro mountain bikers.
The Race Face Aeffect R 35 Stem is engineered for aggressive mountain biking, offering a perfect blend of strength, light weight, and modern aesthetics. Designed for Down-Country, Trail, All-Mountain, and Enduro riding, it provides a dependable cockpit for challenging terrain. Its sleek design features a continuous spine for a cohesive look and a Top-Lock Clamp Style for a clean, secure handlebar connection. This stem is built to handle demanding rides while maintaining a refined appearance.
$55.00
Owner Satisfaction
4.6
/ 5
Category Rank
417
/ 2100
#417 in Components
Price vs Category Average
-47%
Below average
Clamp Diameter
35
/ mm
Who it's for
- Aggressive riders seeking precise steering and front-end control
- Enduro racers needing a stem that survives heavy impacts
- Budget-conscious mountain bikers wanting premium performance and style
Who should skip it
- Cyclists unwilling to upgrade their existing 31.8mm handlebars
- Weight-obsessed racers looking for the lightest possible cockpit setup
- Riders sensitive to trail chatter and hand fatigue
Performance breakdown
Structural Rigidity
3D-forged aluminum provides a rock-solid connection for aggressive trail handling.
Weight Efficiency
Strikes an impressive balance between durability and keeping front-end weight low.
Installation Simplicity
The Top-Lock clamp design makes handlebar swaps and adjustments remarkably straightforward.
Cockpit Versatility
Multiple length options ensure a precise fit for various riding styles.
Aesthetic Integration
The continuous spine design offers a clean, modern look for any build.
Terrain Adaptability
Built to withstand the rigors of everything from trail to enduro.
Key Specs
Clamp Diameter
35mm
Lengths Available
32mm, 40mm, 50mm, 60mm
Rise
0°
Material
3D-forged 6061 Aluminum
Stack Height
38mm
Steer Tube Diameter
1 1/8"
Weight
131g (32mm length)
Features
- Available in multiple lengths for custom fit
- Zero Rise for a flat cockpit
- 3D-forged 6061 Aluminum construction
- Lightweight design for optimal performance
- Sleek, modern aesthetic
- Top-Lock Clamp simplifies cockpit
- Balances strength and weight
- Versatile for various MTB disciplines
What customers say
Users consistently praise the Race Face Aeffect R 35 Stem for its exceptional strength and stiffness, making it ideal for aggressive trail and enduro riding. Riders frequently note the significant improvement in front end rigidity when paired with 35mm bars, resulting in more precise steering and enhanced control on technical terrain. Its robust construction earns high marks for durability, reliably handling abuse without performance loss. While not the lightest option, its strength justifies the weight for demanding applications. The stem offers a secure fit, clean aesthetics, and delivers dependable, high performance, representing excellent value for riders prioritizing reliability and confidence.
Know before you buy
This stem is specifically designed for 35mm diameter handlebars. It will not fit standard 31.8mm bars without a shim, which is not recommended for this application.
The Top-Lock design features a secure, two-bolt top interface that simplifies the installation process. It ensures an even, consistent clamping force across the handlebar for a reliable connection.
The Aeffect R 35 features a 0° rise, meaning it will not add or subtract height from your cockpit setup. If you are looking to adjust your bar height, you will need to rely on spacers or a different handlebar rise.
Yes, it is engineered from 3D-forged 6061 aluminum to balance strength and weight, making it durable enough for trail, all-mountain, and enduro riding.
The stack height for this stem is 38mm. Ensure your steerer tube has enough length to accommodate this measurement along with any headset spacers you plan to use.
Shorter lengths like 32mm or 40mm provide quicker, more responsive steering suited for technical terrain, while longer lengths like 50mm or 60mm offer more stability and a slightly more stretched-out climbing position.
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