Engineering the AERIX Series – The Art of Balanced Performance
For years, lightweight road rims have faced the same dilemma — reduce grams and risk strength, or add reinforcement and lose responsiveness. At BTLOS, we refused to compromise. The AERIX series was created to achieve both: race-level lightness with long-term structural integrity.
Precision through Data. Performance through Materials.
Born from thousands of real-world data points, the AERIX Series isn’t just engineered — it’s decoded from performance itself.
Every micro-deformation, every flex point, every stress signature was captured, analyzed, and refined. From this, we sculpted a rim that understands how forces travel through every fiber — and responds with pure efficiency.
Through hybrid composite layering, we blend ultra-high modulus carbon with strategically reinforced fibers, creating a structure that’s both impossibly light and brutally strong.
Material is placed only where it earns its place — preserving torsional and lateral stiffness while stripping away every unnecessary gram. The result: a rim that translates every watt into motion, and every impact into confidence.
Built from the Inside Out
The AERIX PRO RS52 starts with how it’s made — not how it looks. Instead of drilling spoke holes after molding, BTLOS integrates each spoke interface directly during carbon layup.
This Fiber-Continuous Spoke Hole Design (Only for the AERIX RS52 pro) preserves uninterrupted carbon strands around every hole, forming the strongest possible spoke bed.
The benefit is immediate and lasting: spoke tension remains even, micro-cracks are virtually eliminated, and the wheel stays true longer — even under heavy torque or braking.
The Bowl-Shaped Advantage(Only for the AERIX RS52 pro)
Each spoke hole sits on a bowl-shaped carbon platform, molded concave to match nipple alignment.
This small detail solves one of the biggest hidden problems in wheel design — lateral bending stress at the nipple base.
With this platform, spoke tension flows naturally through the fibers instead of across them, ensuring smoother load transfer, easier wheel building, and a wheel that holds tension evenly across all spokes.
Front–Rear Differentiated Design
The RS52 doesn’t treat both wheels the same — because they don’t do the same job.
- Front (335g): Lightweight for precision steering and terrain feedback.
- Rear (370g): Reinforced for drivetrain torque and higher rider loads.
This pairing gives riders flexibility:
| Configuration | Rider Weight Limit | Character |
|---|---|---|
| 335g + 335g | ≤100kg | Ultra-light climbing setup |
| 335g + 370g | ≤115kg | Balanced, all-round performance |
| 370g + 370g | ≤125kg | Ultra-light climbing setup |
A Perfect Match for Modern Tires
The 25mm internal width pairs seamlessly with 30C–32C tires — the new standard for performance road and endurance racing.
It improves cornering grip, stability, and comfort while maintaining aerodynamic advantage on fast flats.
Beyond UCI Standards
Every AERIX series rim is tested under UCI’s official impact protocol (tire removed) and passes a remarkable 90J energy test — double the requirement.
This means greater safety margin and confidence for real-world racing conditions where unseen impacts happen fast.
Precision You Can Feel
Professional wheel builders often notice the difference before a single spoke is tensioned.
The AERIX series’ rim perfect roundness and flatness out of the mold make truing effortless.
Even spoke tension builds up cleanly, and the wheel remains balanced after thousands of kilometers — a hallmark of high-precision engineering.
The BTLOS AERIX PRO RS52 rim strikes a perfect balance between lightweight construction and aerodynamic performance. Weighing just 335g ±15g, and paired with the GravelXpert20 hub and carbon spokes, the complete wheelset comes in at an impressively low 1058g ±25g
RS52 Front Wheel
RS52 Rear Wheel
Test Report
Full test data will be included here. Coming soon
- Impact Test: Conducted under official road wheel conditions (no tire mounted).
- Result: Withstood 90J impact with no fracture or structural failure.
- Comparison: UCI standard = 40J → AERIX rims exceed it by 125%.
- Note: Once the 90J test was successfully completed with zero damage, no further impact testing was performed, confirming that the rim’s safety margin far exceeds typical racing demands.
Why Choose the BTLOS AERIX Series rims?
Our confidence isn’t built on words, but on proof.
A dedicated fan once mailed us an “ultra-light rim” from another well-known brand for comparison.
When tested side-by-side, the AERIX Series showed:
- Better roundness right out of the mold
- Higher lateral and torsional stiffness under load
- Lower overall weight
The difference was clear — precision manufacturing and optimized layup outperform overhyped claims.
The BTLOS AERIX series represents the next step in road wheel engineering — lightweight precision built for real-world strength.
It doesn’t just meet UCI standards; it surpasses them with confidence to spare.
Every detail, from spoke seat geometry to impact testing, reflects BTLOS’s pursuit of performance measured not in promises, but in results.
Something exciting is coming soon!
620 g
320 USD