The Biggest Swing of the Season: Our Black Friday Golf Shaft Sale, 30% Off Sitewide (Code BFCM30)

One golfer hit five drives with his stock shaft and five with a JUPITER One, using the same driver at about 112 mph of clubhead speed. Both shafts averaged around 300 yards. But the stock shaft scattered shots up to 30 yards left and 40 yards right, while the JUPITER One kept all five inside about a 20-yard spread. That's five shots from one golfer, so it's a story and not a promise. But it shows why distance alone doesn't tell you much about a shaft.

This is the biggest swing of the season for us: our Black Friday and Cyber Monday sale is on, and every Steadfast shaft is 30% off sitewide with code BFCM30. A JUPITER One Driver Shaft is $149.95, which comes to about $105 with the code. Here's what the shaft does, what golfers have said about it, and how to pick your flex before you order.

How do you get the Black Friday deal?

Pick your shaft, add it to your cart and enter BFCM30 at checkout. That's it. The sale is sitewide, so it isn't limited to one shaft.

For a single JUPITER One shaft, the math looks like this:

Our shafts have sold out before, so if you know the flex and adapter you want, don't leave it to the last day.

Why do golfers change the shaft instead of buying a new driver?

A new driver can cost hundreds of dollars. If you like your driver head, the shaft is often the cheapest part to change, and it's the part that decides how the club loads, twists and releases. A new shaft won't fix a swing fault, but it can change how a driver feels and how consistently it delivers the head.

That's the idea behind a replacement shaft. You keep the head you know and change the connection between your hands and the club.

What makes our shafts different?

Premium carbon fiber. We build our shafts from premium carbon fiber, layered so the shaft stays light while it resists twisting. If you want the detail, our Carbon Fiber Golf Shafts page shows the full line.

A low-torque design. Torque is how much a shaft twists during the swing. We design the JUPITER One with torque and balance as the top priority, to keep the clubface steadier at impact.

Head-to-shaft balance. We balance the weight so the club leads your hands through impact. That's what we aim for in a smooth release.

Four flexes matched to swing speed. Senior is for 70 to 89 mph, Regular for 90 to 99, Stiff for 100 to 109 and X-Stiff for 110 to 129. Choosing by speed, not by age or ego, is the most important step.

Ready to install. You pick your driver brand's adapter, your hand and your grip size, and we install the adapter and grip before the shaft ships. We list 21 adapter options on the JUPITER One page.

A fair price. Premium shafts from the big brands often cost $300, $400 or $500. Ours is $149.95 before the sale.

There's also test data. In the Golf Laboratories test we publish, the same TaylorMade M5 driver head and loft carried 288 yards with our shaft and 278 and 276 yards with two other aftermarket shafts. That's one driver head and a test we published ourselves, so use it as a reason to try a shaft, not as a promise for your swing.

What are golfers saying?

Every swing is different, so we let the reviews show the range. Here are four from our JUPITER One Driver Shaft page:

• David Mc (72) put one in his old Callaway driver and wrote that his fairways hit went from about 40% to 79% in the first round on the same course.

• Steven Shifflett wrote: "Carry distance with the new shaft went from 240 to 255. Much lighter than my stock off the shelf shaft."

• G.A.B. ordered Regular flex because his swing speed had dropped, and says "the added distance I've been searching for has become a reality." He then ordered a second one for his mini driver.

• gary adams says his Ping 440 LST is about 10 yards longer, but adds: "It feels a bit whippy and if I really swing all out (92-95mph) I tend to loose it right." We include that one because it's a reminder to think about your tempo.

Those are individual results, not guarantees. Which of the four sounds like you?

Which flex should you pick before you order?

Take two minutes and write these three things down:

1. Your average driver swing speed. Use your average, not your fastest swing. A launch monitor or a fitter will measure it. If you don't have one, your carry distance gives a rough guide.

2. Your tempo. A quick, aggressive swing loads a shaft harder, and a smooth one may like a softer flex. If you're within 3 or 4 mph of a boundary, tempo breaks the tie.

3. Your usual miss. Left, right, high, low or all over.

Then match your speed to the range above. If you're not sure, choose the flex that matches your speed and use your tempo to decide between two.

Don't pick a flex because it sounds strong. A shaft that's too stiff for you doesn't load properly, and it usually shows up as low, weak shots.

What if the flex isn't right?

Our Shaft Flex Satisfaction Guarantee gives you 60 days from receiving your order to exchange your shaft for a different flex. It's an exchange, not a refund, and custom shafts aren't eligible. Here's how it works. If you're giving a shaft as a gift, remember that the 60 days start when the order arrives, not when the gift is opened.

The bottom line

Our Black Friday and Cyber Monday sale takes 30% off every Steadfast shaft with code BFCM30. The JUPITER One is premium carbon fiber with a low-torque, balanced design, four flexes, and the adapter and grip installed before it ships. It's one golfer's story at a time, but the reviews and the test data give you reasons to try it. Check your swing speed, pick your flex, and enter BFCM30 at checkout. Start with the JUPITER One Driver Shaft.

Frequently asked questions

What is the Steadfast Black Friday sale?

Our Black Friday and Cyber Monday sale takes 30% off sitewide with code BFCM30. Add your shaft to the cart and enter the code at checkout.

How much is a JUPITER One shaft with the Black Friday code?

A JUPITER One Driver, 3 Wood or 5 Wood Shaft is $149.95 before the sale. With 30% off, that comes to about $104.97.

Which flex should I choose?

Choose by your average swing speed: Senior for 70 to 89 mph, Regular for 90 to 99, Stiff for 100 to 109 and X-Stiff for 110 to 129. If you're close to a boundary, your tempo should decide.

Will a Steadfast shaft fit my driver?

You choose the adapter for your driver brand on the product page, along with your hand and grip size, and we install the adapter and grip before the shaft ships. Check the adapter list for the specific shaft, since the lists differ slightly.

What if I choose the wrong flex?

Our 60-day Shaft Flex Satisfaction Guarantee lets you exchange your shaft for a different flex within 60 days of receiving your order. It's an exchange, not a refund, and custom shafts aren't eligible.