High-Strength Lightweight Carbon Spokes: Ti.C-2.1&Al.C-3.5
Traditional steel spokes suffer from heavy weight, noticeable flex, and gradual fatigue deformation over time. Many riders upgrade to carbon spokes to reduce unsprung wheel weight, improve wheel responsiveness, and create a stiffer, more precise wheelset feel. Compared with conventional steel spokes, they provide quicker acceleration, sharper cornering feedback, and better vibration damping for smoother long-distance rides.
When upgrading your wheelset, choosing premium ultra-light carbon spokes directly elevates your overall riding experience. Today we introduce two popular models: Ti.C-2.1g and Al.C-3.5g. Below we detail their material structure, lateral stiffness, tensile strength, fatigue resistance and applicable scenarios, helping you find the perfect upgrade for your road bike or mountain bike.
Material & Construction: Two Directional Fiber Layups
Material determines the core performance of bike spokes. Our two models adopt customized directional fiber layups to balance riding comfort and instant power transfer, delivering responsive pedaling with no lag.
| Model | Shaft Material | Nipple Material | Measured Weight |
|---|
| Ti.C-2.1 | Carbon fiber | Titanium alloy | 2.1g |
| Al.C-3.5 | Carbon fiber | Aluminum alloy | 3.5g |
Actual weight test of 290mm Ti.C-2.1g carbon spoke
Spoke length = 290mm. This 2.1g model is the top pick for riders pursuing extreme performance.
Weight gap between carbon spokes and traditional steel bike spokes
Spoke length = 290mm. Traditional steel spokes weigh around 5.5g apiece. Even the 3.5g version achieves a 30-40% weight reduction.
Both items are manufactured with a specialized molding process that prevents fiber breakage during production. A coated resin layer is applied to the surface as protective shielding, keeping them in top condition for long-term use.
Additionally, the unified one-piece molding structure eliminates loose layers and internal gaps, ensuring uniform force distribution across the entire spoke. This precision manufacturing process avoids common carbon spoke issues such as delamination, surface cracking, and inconsistent rigidity.
Spoke length = 290mm. Traditional steel spokes weigh around 5.5g apiece. Even the 3.5g version achieves a 30-40% weight reduction.
Measured Lateral Stiffness (Resistance to Wheel Wobble)
Lateral stiffness is a vital metric for wheelset stability, and both options deliver impressive performance in this aspect.
We tested samples with a standard length of 290mm. Lateral force was applied to the midpoint to measure deformation per unit force (N/mm).
| Model | Lateral Stiffness (N/mm) | Test Condition |
|---|
| Ti.C-2.1 | 784 N/mm | Force applied perpendicular to shaft mid-span, simply supported ends |
| Al.C-3.5 | 1176 N/mm | Same as above |
Higher values mean stronger resistance to lateral deformation.
The Ti.C-2.1g undergoes strict quality control, with a tested lateral stiffness of 784 N/mm. It effectively resists distortion during cornering and rough terrain riding, stabilizing the rim and avoiding wheel wobble. You will get precise handling whether sprinting on paved roads or crossing rugged trails, with consistent and reliable wheel performance.
Thanks to adjusted carbon fiber layers and layup techniques, the Al.C-3.5g features higher lateral stiffness at 1176 N/mm. It holds the wheelset firmly under side loads, working steadily for daily commutes, recreational road rides and regular mountain biking. It stands up to frequent direction changes and minor impacts, bringing safety and confidence to riders of all skill levels.
Tensile Strength & Fatigue Resistance
High tensile strength, solid stiffness and excellent fatigue resistance are the key advantages of these two upgrades.
We used a tensile testing machine to pull samples until failure and recorded force-elongation curves.
Tensile strength test curves for Ti.C-2.1 carbon spoke models
The Ti.C-2.1g reaches a tensile strength of 326 kgf. It resists stretching and bending under high tension, maintaining consistent stiffness with minimal power loss during sprints and steep climbs.
Both styles have passed rigorous durability tests. Regular riding exposes spokes to repeated vibration and cyclic loads, which easily wears out ordinary parts. Our unique fiber layup and structural design disperse stress effectively. Even after thousands of kilometers of riding, you will not see fiber damage or performance drop. Great fatigue resistance extends service life and cuts long-term maintenance costs.
Application Guide: Suitable for Road & Mountain Bike Wheelsets
The Al.C-3.5g boasts greater tensile strength and structural rigidity at 500 kgf. It reliably bears continuous pedaling force and minor impacts, retaining stable mechanical properties after long hours of use.
Both models work with road and mountain bikes, yet their respective strengths fit different riding demands, based on the test data above.
Ti.C-2.1g
Best for: climbing wheelsets, competition road bikes, lightweight gravel bike setups. Reasoning: Ultra-low weight, moderate lateral stiffness and direct riding feedback. Not recommended for heavy impacts such as big drops or rocky enduro trails.
Al.C-3.5g
Best for: all-mountain bikes, trail bikes, e-MTB, endurance road bikes and daily training wheels. Reasoning: Higher structural strength and longer service life. It offers better cost performance than the titanium nipple version, and remains 30-40% lighter than standard steel spokes.
Both designs are compatible with mainstream hub interfaces (2.0mm / 2.3mm / 2.5mm optional). Please select the proper length according to your hub drilling and wheel building requirements.