Project X Denali Blue 6.5 70g Extra Stiff Flex Driver Shaft - Callaway Optifit Adapter

Project X Denali Blue 6.5 70g Driver Shaft 

Extra Stiff

Golf Pride Tour Velvet 360 Standard Grip

Measures 44.5" Playing Length 45.75"

Callaway Standard Length

Callaway Optifit Adapter

Fits the following Callaway driver heads:

QUANTUM ELYTE Ai SMOKE PARADYM ROGUE ST EPIC B21 / REVA MAVRIK EPIC FLASH ROGUE GBB EPIC FUSION ALPHA 815 & 816 XR, XR16 XR SPEED BIG BERTHA X2 HOT 

The Project X Denali Blue 6.5 70 Extra Stiff Flex driver shaft is engineered for golfers who want a balanced mid-launch, mid-spin ball flight with exceptional stability and a smooth, controlled feel. Designed within the Denali series, the Blue profile offers a refined blend of performance characteristics, ideal for strong golfers who want a reliable trajectory that combines carry distance with accuracy.

At approximately 73 grams, this shaft provides a firm, confidence-boosting feel, perfectly suited for players with faster swing speeds or more aggressive transitions. The Denali Blue construction features a stable butt section, offering control and feedback in the hands, and a straight-taper midsection for smooth energy transfer throughout the swing. This design delivers predictable timing and encourages consistently centred strikes.

The Denali Blue series sits between the high-launch Denali Red and the low-spin Denali Black, making it the most versatile option in the lineup. Its mid-launch and mid-spin design supports a flight window that is playable for a wide range of golfers who require stability and responsiveness without extreme behaviour in either direction.

This shaft is custom-built to your specifications, ensuring perfect length, grip and adapter selection for optimal performance with your chosen driver head.

Performance Features

• Mid Launch Design – Produces a controlled, playable trajectory suited for distance and stability.
• Mid Spin Profile – Helps maintain carry distance while supporting reliable dispersion control.
• Extra Stiff Flex (6.5) – Ideal for higher swing speeds needing stability through transition and impact.
• Stable Butt Section – Enhances control, feedback and confidence.
• Smooth Energy Transfer – Straight-taper profile improves feel and timing during the downswing.
• Weight Class (~70g) – Adds stability and control without sacrificing smoothness.

Ideal Golfer Profile

The Denali Blue 70 Extra Stiff is best suited for golfers who:

• Have fast swing speeds or an assertive transition
• Want a balanced, repeatable flight window
• Prefer a firm, controlled feel
• Are seeking tight dispersion and consistent ball-striking
• Want a shaft that avoids both ballooning and overly flat trajectories
• Are upgrading to a premium, performance-focused custom build

Expected On-Course Benefits

• More predictable and repeatable launch conditions
• Reliable trajectory control without excessive spin
• Strong stability for confident swings at higher speeds
• Enhanced dispersion patterns for improved accuracy
• Smooth, controlled feel with responsive feedback

Technical Specifications