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 28-A.

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 28-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 28-A, which results in rims that are lighter and stronger, 250g 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 Upgrade: Toray T1000 Aerospace Grade Carbon Fiber, Further Improving Performance.

Alpha 28-A pioneers the use of Toray T1000 aerospace-grade carbon fiber as its main structural material, making rim much stronger. T1000 carbon fiber has better tenacity and rigidity than T800 and T700 carbon fiber.

3. Highly Strict Technical Test Methods — 95J (UCI test condition).

We applied the UCI test conditions to test Alpha 28-A carbon rim. The impact test result was 95J. 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.

Positive Stiffness Test

Experimental Rim	Alpha 28-A · 250g · 20Holes	Result Reference: ≥ 100 N/mm	Date 2025.11.06
Testing Items	Tension / Force	Result - Deformation \| Stiffness Value	Result Determination
Positive Stiffness	50 kgf	4.94 mm \| 100 N/mm	PASS

Lateral Stiffness Test

Experimental Rim	Alpha 28-A · 250g · 20Holes	Result Reference: ≥ 6 N/mm	Date 2025.11.06
Testing Items	Tension / Force	Result - Deformation \| Stiffness Value	Result Determination
Lateral Stiffness	25 kgf	16.50 mm \| 14.84 N/mm	PASS

Spoke Tension Test

Experimental Rim	Alpha 28-A · 250g · 20Holes	Result Reference: ≥ 300 kgf	Date 2025.11.06
Testing Items	Tension / Force	Result Description	Result Determination
Spoke Tension	326 kgf	12.5 mm deformed, no cracks.	PASS

Impact Test

Experimental Rim	Alpha 28-A · 250g · 20Holes · Spoke Tension 130kgf		Date 2025.11.06
Testing Items	Test Conditions (UCI)	Impact Strength	Result Determination
Impact Test 1	Drop Hammer 24Kg · Drop Height 361.4mm	85 J	PASS
Impact Test 2	Drop Hammer 24Kg · Drop Height 382.6mm	90 J	PASS
Impact Test 3	Drop Hammer 24Kg · Drop Height 403.9mm	95 J	PASS
Impact Test 4	Drop Hammer 24Kg · Drop Height 425.2mm	100 J	FAILED

Beyond these core innovations above, Alpha 28-A carbon rim incorporates numerous advanced manufacturing techniques including precision carbon fiber cutting, optimized mold materials and refined production processes - collectively establishing Alpha 28-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 28 ~ 53mm Road / 28 ~ 40mm Cyclocross / 28 ~ 60mm Gravel. The tire pressure is recommended at 30 ~ 90psi Road / 25 ~ 54psi Cyclocross / 27 ~ 79psi Gravel.