Choosing carbon fiber is not "more expensive is better" — it is matching the grade to the product's load requirements while managing cost.
T-series: graded by strength/modulus
Using Toray's naming system, widely adopted across the market:
- T300: standard modulus, cost-effective, ~3,530 MPa tensile — good for entry-level, cost-sensitive products
- T700: high strength, ~4,900 MPa, balancing strength and toughness — the mainstream choice for sports gear
- T800: high-strength intermediate-modulus, ~5,490 MPa, stiffer and lighter — for premium competitive / aerospace-grade parts
3K / 12K: filaments per tow
K = 1,000 filaments. 3K means a tow of 3,000 fibers.
- 3K: fine, attractive weave — used for decorative surface layers and premium looks
- 6K / 12K: efficient coverage and lower cost — mostly for inner structural layers
UD vs woven
- UD (unidirectional): fibers aligned one way, maximum strength/stiffness along the load direction — the go-to for structural plies
- Plain/twill woven: balanced bi-directional, with the classic checkerboard/twill carbon look — balancing performance and appearance
Practical combinations
Premium sticks often use 18K full-carbon / T700–T800 UD for the structural layer + 3K woven for the surface: the inner layer ensures FLEX and strength, the outer ensures feel and looks. Entry/junior models like the C2 use a carbon + glass hybrid to balance cost and durability.
Rule of thumb: structure follows T-series and layup, appearance follows 3K weave, cost follows the carbon-to-glass ratio.