[Supreme Alpha 36S] Alpha 29" Mountain Bicycle Carbon Rim 36mm 240g (Molded Spoke Holes)

  • Unit Price: 450.0 USD

  • Price in reward points: 45000
  • [Supreme Alpha 36S] Alpha 29" Mountain Bicycle Carbon Rim 36mm 240g (Molded Spoke Holes)



Introduction

In the relentless pursuit of carbon fiber bicycle rim innovation, NEXTIE continues to break boundaries. For top-level mountain bike rims, the ultimate goals remain: lighter weight, greater strength, enhanced durability, and uncompromised riding comfort. The newly launched Supreme Edition Alpha 36S carbon mountain bike rim embodies our revolutionary solution. Specifically engineered for all forms of Cross Country riding, this rim features a 30mm internal width while maintaining a mere 240g weight, incorporating multiple core technological innovations.


1. Molded Spoke Holes and Valve Stem Hole, Resulting in Rims that are Stronger and Lighter

Diverging from traditional crude drilling methods, we implement precision-molded spoke holes and valve holes through integrated mold forming technology. This approach eliminates structural damage to carbon fibers, significantly enhancing rim strength and durability. Simultaneously, we've optimized spoke hole angles at 6° axial and 5° radial orientations. These precision-engineered angles effectively minimize spoke stress and maximize power transfer efficiency.

2. Material Breakthrough: Toray T1100 + T1000 Aerospace Grade Carbon Fiber

The Alpha 36S pioneers the use of Toray T1100 aerospace-grade carbon fiber as its main structural material, strategically reinforced with Toray T1000 for localized optimization. This represents an ultimate upgrade from the Omega 36U material system. Despite matching the Omega 36U’s strength, the Alpha 36S achieves unprecedented weight savings: 24-hole version at 242g, 28-hole version at 245g, crowning it as one of the lightest MTB rims globally.

3. 3rd-Generation Layer-up Structure

As illustrated, all Supreme Edition MTB carbon rims — including the Alpha 36S rim — employ our third-generation carbon fiber layer-up structure. The outermost carbon layer on the rim bed closely integrates with the main body structure, wrapping around the outside of the rim to relocate seam joints away from the rim lip which is most susceptible by impact. This structure significantly improves the impact resistance of the rim during the technology impact test, so that it is not easily damaged by high impact in reality riding.

4. Highly Strict Technical Test Methods — 100J for 24Holes & 105J for 28Holes

For all of the Supreme Edition MTB rims, we implement Specialized Laboratory testing standards exceeding UCI requirements: V-shaped impact hammer testing at 25psi tire pressure. This methodology better simulates actual mountain riding conditions, providing more realistic strength evaluations. While 84J impact resistance is considered exceptional under these conditions, our Supreme Cross Country carbon rims (including Omega 36U and Alpha 36S) achieve extraordinary 100-105J results. Notably, Omega 36U has maintained zero customer complaints since its July 2024 release, with Alpha 36S demonstrating equivalent testing performance. IMPACT TEST VIDEO: 28Holes and 24Holes.

5. 23mm Low-Profile Optimization for Riding Comfort and Tubeless-Ready

In terms of the rim height design, 23mm not only satisfies the needs of riding comfort, but also defines the minimum height of the Tubeless-Ready rim design, which is based on our years of experience. The primary design feature of the Alpha 36S is the use of molded spoke hole technology to improve the overall strength of the carbon fiber material on the spoke hole side. In the other aspect, the Tubeless-Ready design does not damage the carbon fiber material on the rim bed, thereby maintaining the integrity of the carbon fiber material on the rim bed side. Therefore, the Tubeless-Ready design is the option we highly recommend for the Alpha 36S carbon rim. The Tubeless-Ready rim manufacturing process based on the Molded Spoke Hole Technology is different from the rim manufactured by traditional spoke hole drilling process. It is a patented production technology, which we will introduce in detail later.


Beyond these core innovations above, Alpha 36S carbon rim incorporates numerous advanced manufacturing techniques including precision carbon fiber cutting, optimized mold materials, refined production processes and wheelset temperature test under 80 ℃ for 4 hours - collectively establishing Alpha 36S carbon rim as the ultimate MTB Cross Country competition-grade product.

This rim could be used for Cross Country (XCO, XCM, XCC), Marathon, Endurance Cross Country, Trail riding. The tire size for this model of rim is recommended at 2.0" ~ 2.75". The tire pressure is recommended at 18 ~ 32 psi. 


What's in the Box

Carbon Rim(s)

Tubeless Kits (Tubeless Valve Stem x 2 and Tubeless Tape x 1)

Documentation


Learn more

Basic

  • Name: Alpha 36S
  • Code: NXT29VM36S
  • Rim Type: Mountain Bike (Clincher, Hookless)
  • Materials: Carbon Fiber (Toray T1100 + T1000)
  • Edition: Supreme Edition
  • ASTM Classification: Condition 3
  • Warranty: 5 Years
  • Release Time: February 2025

Specification

  • Size: 29"
  • BSD (Bead Seated Diameter): 622mm
  • ERD (Effective Rim Diameter): 591mm
  • Drillings: 24, 28
  • External Width: 36mm
  • Internal Width: 30mm
  • Rim Height: 23mm
  • Spoke Bed Offset: 3.0mm
  • Rim Lip Thickness: 3.0mm
  • Weight: 24Holes 242g | 28Holes 245g
  • Valve Hole Diameter: 6.5mm (Presta)
  • Spoke Holes Diameter: 4.5mm
  • Spoke Holes Angle: Axial 6° | Radial 5°
  • Assembly Hole Diameter: 7.5mm
  • Drain Holes: Yes
  • Tubeless Compatible: Yes
  • Strength: 100J (24Holes) / 105J (28Holes) <Pointed Hammer, 25psi>

Recommendation

  • Tire Size: 2.0" ~ 2.75"
  • Tire Pressure: 18 ~ 32 psi
  • Spoke Tension: 100 ~ 130kgf
  • Max System Weight: 143Kg (24Holes) / 150Kg (28Holes)
  • Ideal Valve Stem Length: 36mm

Appearance

  • Carbon Weave: UD
  • Finish: Free Coating

Application

  • application: Cross Country (XCO, XCM, XCC), Marathon, Endurance Cross Country, Trail

Best Feature

  • Feature 1: 1. Molded Spoke Holes and Valve Stem Hole, Resulting in Rims that are Stronger and Lighter.
  • Feature 2: 2. Material Breakthrough: Toray T1100 + T1000 Aerospace Grade Carbon Fiber.
  • Feature 3: 3. 3rd-Generation Layer-up Structure.
  • Feature 4: 4. Highly Strict Technical Test Methods — 100J for 24Holes & 105J for 28Holes.
  • Feature 5: 5. 23mm Low-Profile Optimization for Riding Comfort and Tubeless-Ready.

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