Much has changed in the meaning of the Project X flex codes over the last few years to the confusion of many golfers. Here is a current relative stiffness of various Project X shafts as defined by Project X/True Temper.

Since there is not a common standard between R, S, and X Flex, each is unique to the manufacturer. One manufacturer’s R may be another’s S. The quality of the shaft components and engineering design of the shaft play a part in overall shaft feel, playability, and achievement of desired characteristics the golfer wants from the shaft.

Professional clubmakers and fitters like myself have the equipment and experience to get your fitted into the right shaft to meet your unique needs.

Original Project X Rifle Irons

Tapered

  • Regular – 5.0
  • Regular Plus – 5.5
  • Stiff  – 6.0
  • Extra Stiff  – 6.5
  • Extra Stiff Plus – 7.0

Parallel

  • Regular Plus – 5.5
  • Stiff – 6.0
  • Extra Stiff – 6.5

Original Project X Woods & Hybrids

  • Regular Plus – 5.0
  • Stiff – 5.5
  • Stiff Plus – 6.0
  • Extra Stiff – 6.5

Project X 95 Flighted Irons

  • Regular – 5.0
  • Regular Plus – 5.5
  • Stiff  – 6.0
  • Extra Stiff  – 6.5
  • Extra Stiff Plus – 7.0

PXi Irons

  • Regular – 5.0
  • Regular Plus – 5.5
  • Stiff Plus – 6.0 
  • Extra Stiff – 6.5
  • Extra Stiff Plus –7.0

Rifle Irons

Parallel

  • Senior – 4.0
  • Regular – 5.0
  • Stiff – 6.0
  • Extra Stiff – 7.0

Tapered

  • Senior Plus – 4.5
  • Regular Plus – 5.5
  • Extra Stiff – 6.5

PX LZ Steel Irons

  • Regular – 5.0
  • Regular Plus – 5.5
  • Stiff – 6.0
  • Stiff Plus – 6.5

PX LZ Tour Graphite Irons

  • Regular – 5.0
  • Stiff – 6.0

PXv Tour Graphite Woods

  • Stiff – 5.5
  • Stiff Plus – 6.0
  • Extra Stiff Flex – 6.5
  • Extra Stiff Plus – 7.0

Project X Black Woods & Hybrids

  • Stiff – 5.5
  • Stiff Plus – 6.0
  • Extra Stiff – 6.5
  • Extra Stiff Plus – 7.0

HZRDUS Woods & Hybrids

(Woods available in Black, Yellow, and Red models. Hybrids available in Black model.)

  • Regular Plus – 5.5
  • Stiff – 6.0
  • Extra Stiff – 6.5

HZRDUS T1100 Woods

  • Regular Plus – 5.5
  • Stiff – 6.0
  • Extra Stiff – 6.5

EvenFlow Woods & Hybrids

(Available in Black and Blue)

  • Regular Plus – 5.5
  • Stiff – 6.0
  • Extra Stiff – 6.5