UST Mamiya TSPX DART V 105 X-Stiff Iron Shafts .355 Tip

UST Mamiya TSPX DART V 105 X-Stiff Iron Shafts

The UST Mamiya TSPX DART V 105 X-Stiff Iron Shaft is a precision-built, Tour-grade graphite option designed for high-speed players who want mid-weight control with maximum torsional stability. At 105 grams, this X-Stiff profile provides a perfect fit for aggressive swingers looking for penetrating trajectories, low torque, and ultra-consistent shot dispersion from their iron set.

DART V technology, short for Dual Action Recoil Technology, improves energy transfer through the shaft's length by minimizing deflection lag. The result is a smoother transition from backswing to impact, allowing better players to control tempo while eliminating flex inconsistency that leads to erratic spin or launch.

Built with advanced M40X carbon fiber — TORAY’s high tensile modulus material offering a 30% boost in strength over standard graphite — the DART V 105 X-Stiff delivers a stable but responsive feel. UST’s proprietary nanoalloy resin systems further enhance feel, giving you clean feedback and eliminating the harsh "boardy" sensation common in heavy X-stiff builds. It’s all the control you expect from Tour-weight gear, with the smoothness only graphite can offer.

Best fit for: High-speed players seeking a mid-weight, low-torque X-Stiff graphite iron shaft that offers elite-level dispersion, efficient energy transfer, and clean, stable feel through impact.

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 105 X-Stiff Iron Shafts Spec Sheet