Name: Omega 40D – Supreme Edition 29" 40mm Carbon Downhill Mountain Rim 480g
Brand: NEXTIE
SKU: Omega 40D
Price: 320.00 USD
Availability: InStock

Basic

Model: Omega 40D
Rim Type: Mountain Bike (Clincher, Hookless)
Materials: Carbon Fiber (T1000 + T800 + T700)
Brake Interface: Disc Brake
Edition: Supreme Edition
ASTM Classification: Condition 5
Warranty: 5 Years
Release Time: April 2024

Specification

Size: 29"
BSD (Bead Seated Diameter): 622mm
ERD (Effective Rim Diameter): 593mm
Drillings: 28, 32
External Width: 40mm
Internal Width: 32mm
Rim Height: 24mm
Spoke Bed Offset: 3.0mm
Rim Lip Thickness: 4.0mm
Weight: 480g
Valve Hole Diameter: 6.5mm (Presta)
Spoke Holes Diameter: 4.5mm
Spoke Holes Angle: Axial 6° | Radial 5°
Assembly Hole Diameter: 8.5mm
Drain Holes: Optional
Tubeless Compatible: Yes
Strength: 175J (Pointed Hammer, 25psi)

Appearance

Carbon Weave: UD
Finish: Free Coating, Matte, Glossy

Recommendation

Tire Size: 2.15" ~ 2.9"
Tire Pressure: 20 ~ 32 psi
Spoke Tension: 100 ~ 130kgf
Max System Weight: 156Kg (Downhill) / 177Kg (Enduro)
Ideal Valve Stem Length: 36mm

Discipline

application: Trail, All Mountain, Big Mountain, Freeride, Enduro (and Super Enduro), Downhill, Dirt Jump, Electric bike (eBike)

Best Features

Feature 1: 1. Material Upgrade: Toray T1000 Aerospace Grade Carbon Fiber Added.
Feature 2: 2. 3rd-Generation Layer-up Structure.
Feature 3: 3. Highly Strict Technical Test Methods — 175J (Pointed Hammer, 25psi)
Feature 4: 4. 24mm Low-Profile Optimization for Riding Comfort and Tubeless-Ready.

Introduction

The carbon fiber bicycle industry has been innovating and advancing all the time. Being lighter and stronger has always been the pursuit of the professional bicycle industry. The Supreme Edition was created to explore the performance and weight limits of carbon fiber materials applied to bicycle wheels. We know that different materials would affect the performance and weight of rim products. What if we change the appearance design of a rim? Would it bring any difference or improvements in the strength and weight?

We have found that the most vulnerable part of a rim is the rim lip. If we could enlarge the area of rim lip where it contacts the tire, in theory, under the same impact force, the pressure on a rim with a wider lip area would be less, which could perform a higher impact resistance. Based on this theoretical premise, we newly designed the Supreme Edition Omega 40D Downhill mountain rim with a rim lip width of 4.0mm, which is thicker than the other AM or Enduro rims with rim lip thickness of 3.0mm or 3.5mm. The contact area between the rim lip and the tire is wider, the impact resistance increases.

Based on the Super Enduro version, we adjusted the new stacking technology and the proportion of materials to develop a Downhill version. This Downhill version is heavier but also stronger.

We continue to explore and adjust the stacking manufacturing technology, and finally successfully completed the development of the Omega 40D Downhill rim. The impact test reaches 175J, which is 10% stronger than the previous Premium Edition DH rim NXT29XD39 (160J), and also lighter in weight. This is a huge improvement. IMPACT TEST VIDEO.

Test Results

Impact Test Data (Downhill)

Experimental Rim	Omega 40D · 468g · 28Holes · Spoke Tension 120kgf · 29 x 2.25" Tire		Date 2024.04.24
Testing Items	Test Conditions (Pointed Hammer, 25psi)	Result	Result Description
Impact Test 1	Drop Hammer 21.5Kg · Drop Height 712mm	150 J	PASS
Impact Test 2	Drop Hammer 21.5Kg · Drop Height 759mm	160 J	PASS · EXCELLENT
Impact Test 3	Drop Hammer 21.5Kg · Drop Height 807mm	170 J	PASS · EXCELLENT
Impact Test 4	Drop Hammer 21.5Kg · Drop Height 831mm	175 J	PASS · EXCELLENT

* Impact Test 4 at 175J represents the validated safe maximum for the Omega 40D Downhill rim. Testing was concluded at this level.

This rim could be used for Trail, All Mountain, Big Mountain, Freeride, Enduro (and Super Enduro), Downhill and Dirt Jump. The tire size for this model of rim is recommended at 2.15" ~ 2.9". The tire pressure is recommended at 20 ~ 32 psi.