Ladies flex vs senior flex: one shaft, one gram apart

The counter shows you the same driver twice. One is stamped L. One is stamped A. Nobody tells you which one is yours.

That split lives on Japanese and Korean spec sheets. If you’re shopping a Japan- or Korea-market driver, or reading the original sheet that came with one, this is the choice you meet. It usually arrives with no explanation attached.

The stock answer is that L is the women’s flex and A is the senior flex. That’s a real thing people say in shops, and you’ll hear it from other golfers too. But it describes who is expected to buy each one. It doesn’t tell you what changes in the club.

So I went to one manufacturer’s own spec sheet and read the two rows side by side. On that club, L and A are the same shaft. The published gap between them is one gram and half an inch.

The short answer

• On the XXIO 14 Ladies driver, both L and A carry the same MP1400L shaft. Dunlop lists it at 35 g in L and 36 g in A (Dunlop Japan, retrieved 2026-09-07).
• Torque and kick point are identical between them: 7.0 and mid for both.
• The bigger change is length. L builds to 44 inches, A to 44.5, and club weight lands at 262 g and 264 g.
• Dunlop’s own target head speeds are 35 m/s (78 mph) for L and 37 m/s (83 mph) for A. That narrow band is the actual decision.
• R on this driver is a different shaft, not a firmer version of the same one.

The same club still makes you pick a letter

You’ll want to look at the two rows before the letters.

Source: Dunlop Japan, XXIO 14 Ladies driver, retrieved 2026-09-07. Club weight and swing weight are the 10.5 and 11.5 degree heads. Weights are as installed, not raw shaft weights.

Two columns of that table are the interesting part, and they are interesting because nothing happens in them. Torque reads 7.0 for L and 7.0 for A. Kick point reads mid for both.

Those two letters supposedly separate a women’s club from a senior’s club. They sit on top of the same shaft, built half an inch apart.

It would be easy to read that as the two being equally stiff. They aren’t. Dunlop calls that column hardness and means it.

What you can’t get is a number for the gap. There’s no frequency or CPM figure on the sheet.

So here’s the narrow version worth holding on to. Torque and kick point are the only printed specs that don’t move between L and A. Everything that does move follows from one gram and half an inch.

Head speed decides this, not the letter

Dunlop answers this directly on the same page, which is unusual and useful. L is listed for driver head speeds up to 35 m/s (78 mph). A is listed up to 37 m/s (83 mph). R is up to 39 m/s (87 mph).

If you have never seen your own number, a screen golf bay will show it to you in a few swings. That number is worth more to you than any letter on a rack, and it’s where ball speed and carry start from. There’s more on finding it and reading it in why 145 mph of ball speed can still be a short drive.

Now the case the numbers above don’t cover. Say you measure 36 m/s, right between the two. The letters give you no answer, but the specs do, because you already know what actually differs.

You would be choosing half an inch of length. Fitters generally work on the assumption that a longer build buys a little speed and costs a little center contact. The shorter one does the reverse. That’s shop practice, not something Dunlop publishes.

On that assumption, contact breaks the tie. If your misses are scattered across the face, you’d take L and give up the half inch. If you find the middle and want the distance, A.

There is one more thing hiding in the same table. Dunlop marks which combinations it builds as stock. The standard L builds are the 12.5 and 13.5 degree heads, while the standard R build is 11.5 degrees.

Loft and flex move together. The slower the swing Dunlop expects, the more loft the stock build gives you.

One thing the table does settle. The R option on this same Ladies driver isn’t a firmer version of your shaft. It’s a different shaft model, four grams heavier and an inch longer than the L build.

A lot of women arrive with a related but separate question, which is whether they can just play a men’s driver instead. That’s a different product with its own sheet, and the numbers here don’t answer it. The underlying question of whether flex follows gender at all is in the shaft flex chart.

Reading the club you already own

The band near the grip is where the club tells you about itself, and it tells you two different kinds of thing.

What’s usually printed there is the shaft model name, the flex letter, and often a gram weight. What’s usually not printed is torque or kick point. The two columns that mattered most in the table above are the two you can’t read off your own club.

The gram weight is a measurement. It means the same thing on every shaft from every brand, so you can compare it directly against the table above. The flex letter isn’t a measurement. It’s each manufacturer’s own label, and two shafts stamped the same letter can play nothing alike.

That gap runs through every flex letter, not just L and A. The R against S version of it is covered in regular vs stiff shaft.

If you want the full ladder from L through X with speed ranges attached, that is in the shaft flex chart.

One caution on the numbers above before you take them to a store. They’re the Japanese specification, retrieved 2026-09-07.

Korea sells the same driver with the same L and A split. It just drops the 13.5 degree head (Dunlop Sports Korea, retrieved 2026-09-07). Lineups get trimmed market by market, so the sheet you want is the one for where you’re buying.

What I would take

If you’re under 35 m/s (78 mph), L. If you’re at 37 (83 mph), A. If you’re in between, contact decides it: shorter for a scattered strike pattern, longer if you find the middle and want the yards.

If you’re at 39 m/s (87 mph) or above, you’re past both of them. That’s the R build, and on this driver R is a different shaft rather than a firmer version of the same one.

And if a shop frames this as a women’s shaft against a senior’s shaft, ask for the gram weights. On this driver they’re one apart.

Terms in this article

• Flex. How much the shaft bends during the swing. Written as a letter (L, A, R, SR, S, X) that each manufacturer defines for itself.
• Torque. How much the shaft twists along its length, in degrees. Lower resists twisting more. Both flexes here are 7.0.
• Kick point. Where the shaft bends most. A lower kick point tends to launch the ball higher. Both flexes here are mid.
• Swing weight. How head-heavy the club feels, on a letter-and-number scale like C3. Higher reads heavier through the swing even when total weight barely changes.
• Installed weight. The shaft weight after it has been cut and built into the club, which is what Dunlop lists here. It is lower than the raw shaft weight.