The Mitsubishi Chemical Diamana BB Series 73 Stiff wood shaft weighs 2.47 oz (70 g) with 2.9° torque and is tuned for a mid launch / mid spin flight. In the wider lineup, it sits at the heavier side of its weight range and the lowest-torque end. Choose this variant when stability, control and a more substantial feel matter more than easy speed.
Wood shaft specifications
Mitsubishi Chemical · Diamana BB Series 73 Stiff · Wood Shaft
Material: GraphiteFlex: StiffWeight class: Midweight (65-74.9 g)Flight: Mid launch / Mid spinUse: Driver / fairway wood
2.47 ozWeight
2.9°Torque
StiffFlex
midLaunch
Wood-shaft benchmarks
How this shaft compares
Numeric comparisons use wood shafts in this database.
Weight
Above average
2.47 oz
Weight is above average among wood shafts in this database.
Torque
Very low
2.9°
Torque is very low among wood shafts in this database.
At a glance
Shaft profile
Launchmid
StabilityVery stable / low-twist
TempoMedium to medium-fast tempos
UseDriver / fairway wood
BiasBalanced speed and control
Overview
Model information
| Manufacturer | Mitsubishi Chemical |
|---|---|
| Model | Diamana BB Series 73 Stiff |
| Category | Wood Shaft |
| Primary use | Driver / fairway wood |
| Catalog year | 2026 |
| SKU / code | MR0117 |
| MPF rating | 4B2H |
Full specifications
Technical details
Weight & flex
Weight2.47 oz (70 g)
Weight classMidweight (65-74.9 g)
FlexStiff
Torque2.9°
Bend pointmid/high
Kick pointMid/High
Tip stiffnessmedium
Build & dimensions
MaterialGraphite
Tip diameter0.335 in (8.5 mm)
Driver tip trim0 in
Flight & feel
Launchmid
Trajectory / spinMid launch / Mid spin
StabilityVery stable / low-twist
Launch assistanceNeutral launch
FeelFirm, highly stable graphite feel
Relative weightAbove average among wood shafts
Relative torqueVery low among wood shafts
Player fit
Tempo fitMedium to medium-fast tempos
Transition fitModerate to firm transitions
Speed vs controlBalanced speed and control
Driver playabilityStable driver profile
Fairway-wood playabilityStrong fairway-wood crossover
Golfer fit summaryBalanced speed and control; medium to medium-fast tempos; mid launch / mid spin.
Related variants
How this version fits the lineup
Sibling comparisons use models from the same product line in this database.
Variant context
Product lineMitsubishi Diamana BB
Position in lineupheavier side; middle flex range; mid launch / mid spin
Closest-version comparisonThis version sits at the heavier side of the range and on the lowest-torque end. It is heavier than Diamana BB Series 63 Tour X and lighter than Diamana BB Series 73 X-Stiff.
Why choose this variantChoose this variant when stability, control and a more substantial feel matter more than easy speed.