Aerotech SteelFiber Parallel Graphite Iron Shafts Specifications

Based on the manufacturer's official specifications from Aerotech Golf's website, the SteelFiber Parallel Graphite Iron Shafts are available in several models, each designed for different player profiles. These shafts feature a .370" parallel tip diameter for broad compatibility with iron heads. Below is a compiled specification chart summarizing the key data across models. Note that lengths are uncut, torque values are approximate averages, and performance characteristics (launch and spin) are model-dependent.

Model	Flex Options	Weight (g)	Torque (°)	Launch	Spin	Length (in)	Butt Diameter (in)
i55	A, R, S	55	3.3–3.8	High	Low	41 (3-iron)	.600
i65	A, R, S	65	3.1–3.6	High	Low	41 (3-iron)	.600
i75	A, R, S	75	2.9–3.4	Mid-High	Mid	41 (3-iron)	.600
i80	R, S, X	80	2.7–3.2	Mid	Mid	41 (3-iron)	.600
i95	R, S, X	95	2.5–3.0	Mid	Mid	41 (3-iron)	.600
i110	S, X	110	2.1–2.6	Low-Mid	Mid	41 (3-iron)	.600

Additional Notes:

Tip Diameter: All models have a .370" parallel tip for easy trimming and fitting.
Bend Point: Mid for most models, promoting a balance of distance and control.
Material: Proprietary SteelFiber construction with integrated steel fibers for stability and dampening.
These specs are optimized for increased clubhead speed (up to 3–5 mph vs. steel) and reduced vibration, making them suitable for players transitioning from steel shafts.

Parallel Iron Shafts

Aerotech SteelFiber Parallel Graphite Iron Shafts

Mitsubishi Chemical MMT Parallel Iron Shaft

Project X Rifle Steel Parallel Iron Shaft

KBS PGI Parallel Graphite Shaft