UST Mamiya TSPX DART V 90 Stiff Iron Shafts .355 Tip

UST Mamiya TSPX DART V 90 Stiff Iron Shafts

The UST Mamiya TSPX DART V 90 Stiff Iron Shaft is designed for competitive players who want precision control in a lighter Tour-weight graphite build. Weighing in at 90 grams with a Stiff flex profile, this shaft delivers the optimal balance of responsiveness, stability, and reduced fatigue — making it an ideal fit for faster swingers seeking more feel and feedback without sacrificing shot dispersion.

Built with UST’s Dual Action Recoil Technology, the DART V 90 Stiff helps eliminate inconsistencies in shaft deflection to produce cleaner energy transfer and a more consistent release. This leads to tighter shot patterns and better control throughout the bag, especially in mid and long irons where consistency matters most.

Engineered using TORAY’s advanced M40X high tensile modulus carbon fiber, the DART V 90 offers a 30% increase in tensile strength over conventional fibers. The integration of nanoalloy resin systems eliminates the harsh, overly rigid feel often associated with lower torque shafts, giving you Tour-level performance with a smooth, playable response.

Best fit for: Skilled players with moderate to fast tempos who prefer a lighter stiff flex iron shaft that delivers stability, shot control, and a responsive feel across all irons.

Can’t find the option you’re looking for? Reach out — we likely carry it or can get it.

IMPORTANT Shipping Details

• Custom-built orders ship in 3–5 business days
• Even expedited shipping follows standard build timelines
• Each order is handled with precision — thank you for your patience!

Need it built?

Add all club components (shaft, head, grip, etc.) to your cart and message us during or right after checkout with your build specs — we’ll assemble your club(s) free of charge. Note: Free builds add 3–5 business days to shipping for custom work.

UST Mamiya TSPX DART V 90 Stiff Iron Shafts Spec Sheet