Introduction
In the relentless pursuit of carbon fiber bicycle rim innovation, NEXTIE continues to break boundaries. Now please allow us to introduce this top-level newly designed road rim —— Alpha P52.
For top-level road bike rims, it is different from mountain bike rims. Light weight is not the primary goal for road rims. The goals of road rims are to achieve a balance between optimizing the weight of the rim and ensuring a certain rotational inertia, excellent dynamic balance, sufficient stiffness to make the rim achieve a smaller deflection, better wind-breaking performance to increase riding speed, and greater strength. The newly launched Supreme Edition Alpha 55-A carbon road bike rim embodies our revolutionary solution, incorporating multiple core technological innovations.
1. Advanced Single-Point (ASP) Reinforcement at Spoke Holes and Valve Stem Hole, Rims being Lighter and Stronger.
We specially designed the rim shape at the spoke hole position, developed the advanced single-point reinforcement technology specifically for Alpha 55-A, which results in rims that are lighter and stronger, 245g only. At the same time, this new design gives us more maneuverability, distributing the weight more toward the edge of the rim, thereby increasing the rotational inertia of the rim, which plays an important role for a top-level road bike rim.
2. Material Breakthrough: Toray T1100 + M46J Aerospace Grade Carbon Fiber, Further Improving Performance.
AFollowing the Alpha 50, this is the second time we have used T1100 and M46J as the main materials for our new carbon fiber rims, the Alpha P52 and Alpha P52G. As we know, the terms "T-series" and "M-series" refer to classifications of Toray carbon fibers, specifically T-series for tensile strength and M-series for modulus (stiffness). M46J has better stiffness performance than T-series like T800, T1000 or T1100. The addition of M46J materials can effectively improve the rotational deflection and stability of the wheels.
3. Highly Strict Technical Test Methods — 100J (UCI test condition).
We applied the UCI test conditions to test Alpha carbon rim. The impact test result was 100J. This is much higher than the UCI's qualified strength standard for road bicycle rims. This strength performance is close to ASTM Classification Condition 3. IMPACT TEST VIDEO.
Beyond these core innovations above, Alpha 55-A carbon rim incorporates numerous advanced manufacturing techniques including precision carbon fiber cutting, optimized mold materials and refined production processes - collectively establishing Alpha 55-A carbon rim as the ultimate road bike competition-grade product.
This rim could be used for Road. Triathlon. Cyclocross. Dirt. Gravel and Adventure riding.. The tire size for this model of rim is recommended at 29 ~ 53mm Road / 29 ~ 40mm Cyclocross / 29 ~ 60mm Gravel. The tire pressure is recommended at 30 ~ 90psi Road / 25 ~ 54psi Cyclocross / 27 ~ 79psi Gravel.
What's in the Box
Carbon Rim(s)
Documentation
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Basic
- Code: Alpha P52G
- Rim Type: Road · Cyclocross · Gravel
- Materials: T700 + T1100 + M46J
- Release Time: February 2026
- Brake Interface: Disc Brake
- Edition: Supreme Edition
- ASTM Classification: Condition 3
- Warranty: 5 Years
Specification
- Size: 700C
- BSD (Bead Seated Diameter): 622mm
- ERD (Effective Rim Diameter): 536mm
- External Width: 32mm
- Internal Width: 24.8mm
- Rim Height: 52mm
- Weight: 345g
- Valve Hole Diameter: 6.5mm (Presta)
- Spoke Holes Diameter: 4.5mm
- Spoke Holes Angles: Axial 7° | Radial 5°
- Drillings: 20. 24.
- Strength: 100J (UCI Condition)
- Tubeless Compatible: Yes
- Assembly Hole Diameter: 7.5mm
- Drain Holes: Optional
Recommendation
- Spoke Tension: 110 ~ 130kgf
- Tire Size: 29 ~ 53mm Road | 29 ~ 40mm Cyclocross | 29 ~ 60mm Gravel
- Tire Pressure: 30 ~ 90psi Road | 25 ~ 54psi Cyclocross | 27 ~ 79psi Gravel
- Max System Weight: 144Kg
Appearance
- Weave: UD
- Finish: Free Coating
Application
- application: Road. Triathlon. Cyclocross. Dirt. Gravel and Adventure riding.
![[Alpha P52G] Supreme Edition Gravel Bicycle Carbon Rim 52mm 345g (Advanced Single-Point) [Alpha P52G] Supreme Edition Gravel Bicycle Carbon Rim 52mm 345g (Advanced Single-Point)](https://www.nextie-oem.com/image/cache/catalog/ 2026-product/Alpha/Alpha-A/Alpha 45G-A-500x500.jpg)