KOIBIKE — XC-M25X35HL-29ER MTB Carbon Wheels
I. Core Advantages of Carbon Fiber Wheelsets
Lightweight: 20%-30% lighter than aluminum alloy wheelsets, reducing weight by 300-500g per pair, significantly improving acceleration and climbing efficiency.
High Rigidity: Provides more direct power transmission, resulting in more agile riding response and more precise handling.
Damping Performance: The natural elasticity of carbon fiber acts like a built-in shock absorber, effectively filtering road vibrations and reducing fatigue.
Aerodynamics: Optimized design reduces wind resistance and improves high-speed stability.
II. Hookless Rim Explained
Definition: The inner edge of the rim has no traditional "hook" structure, presenting a straight edge, also known as "Tubeless Straight Side" (TSS)
Key Features:
* Relies on precise tire-rim fit and air pressure fixation, eliminating the need for hooks.
* Simpler appearance, lighter weight.
* Designed specifically for tubeless tires, reducing the risk of tire blowouts and improving air tightness.
* Easy installation, less maintenance.
III. Carbon Fiber Spokes: The Perfect Combination of Lightweight and Performance
* Material: Multi-layer carbon fiber and resin composite, joints mostly made of titanium alloy.
* Advantages:
* Extremely lightweight: Only 2-3g per spoke, 29%-35% lighter than top-grade steel spokes.
* High tensile strength: Provides higher spoke tension, enhancing wheelset stiffness and responsiveness.
* Damping characteristics: Absorbs high-frequency vibrations, improving riding comfort.
* Reduced rotational mass: More rapid acceleration, easier climbing.
IV. Rim Parameter Details:
25mm Height × 35mm Outer Width × 30mm Inner Width × 29 inches
1️⃣ 29-inch wheel diameter (29er)
Larger wheel diameter provides better off-road capability, suitable for complex mountain terrain.
Reduces bumps and provides a smoother riding experience.
Suitable for off-road riding that prioritizes speed and stability.
2️⃣ 25mm rim depth
Ideal balance between lightweight and rigidity. Balances aerodynamic performance and crosswind stability. Suitable for all-around mountain biking on varied terrains.
3️⃣ 35mm outer width × 30mm inner width
30mm inner width: Designed specifically for 2.0"-2.5" mountain bike tires, providing optimal sidewall support.
35mm outer width: Increases tire-to-ground contact area, improving grip and handling. Optimized wide wheel design reduces tire pressure, improving comfort and traction.
V. Asymmetric Design Rim: A Hidden Performance Boost
Principle: Off-center spoke holes on the rim, resulting in different thicknesses on both sides, combined with an asymmetrical hub flange.
Core Advantages:
Tension Balancing: Solves the problem of uneven spoke tension between the drive and non-drive sides of the rear wheel.
Increased Rigidity: Reduces wheel sway and enhances transmission efficiency.
Enhanced Stability: Especially suitable for high-intensity off-roading and jumps.
Extended Lifespan: Reduces spoke breakage caused by uneven tension.
Working Mechanism: The spokes on the drive side of the rear wheel connect to the inner (thinner) side of the rim, and the spokes on the non-drive side connect to the outer (thicker) side, balancing the tension on both sides.
VI. Overall Performance and Applicable Scenarios
All-Round Mountain Bike:
Lightweight design (approximately 430g per rim) improves climbing efficiency.
High rigidity ensures precise control on technical terrain.
Wide wheel design provides excellent grip on soft terrain.
Straight edge + tubeless structure reduces the risk of tire blowout, suitable for long-distance off-roading.
VII. Summary: Why Choose This Wheelset?
This 29-inch straight-edge carbon fiber wheelset combines lightweight (30% lighter than aluminum wheels), high rigidity, and excellent shock absorption. Its 30mm inner width perfectly matches the modern trend of wide-tire mountain bikes, and its off-center design solves the problem of uneven tension in traditional wheelsets. Whether for XC racing, trail riding, or endurance riding, it provides an exceptional experience that is "light as a feather, stable as a tiger, and strong as steel," making it an ideal upgrade choice for mountain bikers seeking performance enhancement.