The Aerotech SteelFiber fc80 .370 F3-R is heavier than average for graphite iron shafts at 2.96 oz (84 g), while its 2.9° torque is on the lower side. Its mid launch / mid spin flight profile and stable / control-oriented character make it broad fit for smooth-to-medium tempos.
Iron shaft specifications
Aerotech · SteelFiber fc80 .370 F3-R · Iron Shaft
Material: GraphiteFlex: F3-RWeight class: Mid-light (80-99.9 g)Flight: Mid launch / Mid spinTip: Parallel tip
2.96 ozWeight
2.9°Torque
F3-RFlex
VariableLaunch
Material-matched benchmarks
How this shaft compares
Numeric comparisons use graphite iron shafts in this database.
Weight
Above average
2.96 oz
Weight is above average among graphite iron shafts in this database.
Torque
Below average
2.9°
Torque is below average among graphite iron shafts with published numeric torque.
Balance point
Very low
50.5%
Balance point is very low among comparable graphite iron shafts.
At a glance
Shaft profile
MaterialGraphite
TipParallel tip
LaunchVariable
SpinMid
StabilityStable / control-oriented
Tempo fitBroad fit for smooth-to-medium tempos
Overview
Model information
| Manufacturer | Aerotech |
|---|---|
| Model | SteelFiber fc80 .370 F3-R |
| Category | Iron Shaft |
| Catalog year | 2026 |
| SKU / code | AT0034I |
| MPF rating | 3B2H |
Full specifications
Technical details
Weight & flex
Weight2.96 oz (84 g)
Weight classMid-light (80-99.9 g)
FlexF3-R
Torque2.9°
Bend pointvariable
Kick pointMid
Tip stiffnessvariable
Tip flexmedium
Butt flexmedium
Balance point50.5%
Build & dimensions
MaterialGraphite
Tip typeParallel tip
Tip diameter0.37 in (9.4 mm)
Butt diameter0.6 in (15.2 mm)
Shaft length41 in (104.1 cm)
Length rangeSingle-length blank; tip-trim by club
Parallel tip length5.5 in (14 cm)
Club rangeIrons, typically 3i-PW (trimmed from parallel blank)
FinishPainted composite / graphite finish (varies by model)
Flight & feel
LaunchVariable
SpinMid
Trajectory / spin profileMid launch / Mid spin
Stability profileStable / control-oriented
Launch assistanceNeutral launch assistance
Feel profileVibration-damping graphite feel, stable through impact
Relative weight positionAbove average for graphite iron shafts
Relative torque positionBelow average for graphite iron shafts
Player fit
Tempo fitBroad fit for smooth-to-medium tempos
Transition fitWorks best with smooth-to-moderate transitions
Control vs speed biasSlightly speed biased
Long-iron playabilityGood long-iron playability
Short-iron controlBalanced short-iron feel and control
Likely swing-speed fitModerate iron swings
Target playerModerate swing speeds seeking lighter weight with balanced launch and control
Golfer fit summarySlightly speed biased; broad fit for smooth-to-medium tempos; mid launch / mid spin.