Shaft weight, not just flex

Lighter isn't automatically faster. In fitting tests, shaft weight changed swing speed very little, but the right weight for a golfer made contact more consistent and was worth up to a club of distance, and the right weight differed from one golfer to the next.

What the testing shows

Club Champion had 10 golfers (handicaps 2 to 18) hit 6-irons built with 85-, 95- and 105-gram shafts for Golf.com. Average swing speed, ball speed and distance were similar whatever the weight, but each golfer's best weight was worth up to an extra club: 11.4 yards for the 15 to 18 handicaps, 7.0 for the 2 to 5 handicaps. Three testers did best at 85 grams, three at 95 and four at 105. With drivers, SwingFit's study of 46- to 74-gram shafts found weight barely changed club head speed; only fast, low-handicap players gained more than 1 mph with the lightest shafts.

Plugged In Golf saw a 10- to 20-gram change move iron distance by 8 to 10 yards, with half its testers longest on the lightest shaft and the other half losing distance with it; in a separate test of golfers swinging 70 to over 110 mph, weight proved slightly more important than flex. MyGolfSpy Labs' 55- versus 75-gram driver test was split too: most testers swung the lighter shaft faster, but most made more ball speed with the heavier one.

What it means for you

Don't buy light just for speed

For most golfers, a lighter shaft adds little or no speed. Pick the weight you hit most consistently.

Typical weights

As a rough guide, most driver shafts sold today weigh around 50 to 70 grams, and steel iron shafts are heavier than graphite ones. Shaft names often hint at the weight class: the 6 in a Ventus Blue 6, the 105 in a Dynamic Gold 105.

Keep the set consistent

Heavier irons than woods is normal; wildly different weights from club to club make timing harder.

What to check on a used club

A used club's listing should name the shaft model and flex: look the model up to find its weight, and check it matches the rest of your bag. If you're replacing one iron, match the shaft as well as the head: Complete my set matches the head's loft, lie and length, and the listing names the shaft. Flex codes are explained in our shaft flex guide.

Sources: Golf.com: iron shaft weight test with Club Champion; GolfWRX: study on lighter driver shafts and club head speed (SwingFit); Plugged In Golf: do lighter shafts produce longer drives?; Plugged In Golf: does shaft weight matter more than shaft flex?; MyGolfSpy Labs: driver shaft weight test. Checked Oct 6, 2026.