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

UST Mamiya TSPX DART V 90 Regular Iron Shafts

The UST Mamiya TSPX DART V 90 Regular Iron Shaft is engineered for golfers who want the feel and consistency of a premium graphite shaft without the weight penalty of traditional Tour builds. At 90 grams and tuned for a smooth, stable Regular flex profile, this shaft is ideal for players seeking enhanced control, tighter dispersion, and a confident launch window from their irons.

DART V technology features UST’s Dual Action Recoil design, which helps reduce energy loss and flex inconsistencies along the shaft — producing cleaner strikes and more repeatable results. As part of the TSPX (Tour SPX) line, these shafts are exclusively available through certified fitters and built to tighter tolerances than standard offerings.

At the core of the DART V 90 is M40X high tensile modulus carbon fiber by TORAY Industries — a next-gen material that delivers 30% greater tensile strength over conventional carbon fibers. Combined with nanoalloy resins in the prepreg matrix, this design eliminates harsh vibration and offers a clean, responsive feel that makes every iron shot more controlled and confident.

Best fit for: Moderate swing speed players who want a lightweight Tour-grade iron shaft in Regular flex, offering consistent launch, clean feel, and enhanced shot control.

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 Regular Iron Shafts Spec Sheet