There has been a LOT of discussion lately about single-length iron sets. So much, in fact, that as a club builder and fitter single-length irons have become a daily topic of conversation.
Most of this buzz about single-length irons has been created by reigning U.S Amateur and NCAA Division I Individual champion Bryson DeChambeau, who has been very successful using a custom set of single-length irons made by Edel, a boutique equipment company in Texas.
Related: Bryson DeChambeau WITB 2016
Edel isn’t the first company to build a set of single-length irons. Tommy Armour built and marketed a set called the EQL’s in the 80’s, and there have been a few other niche companies who have been building these sets for a long time, including One Iron Golf. Recently, Tom Wishon and Jaacob Bowden released a set of single-length irons. Named Sterling Irons, they’re designed to be built shorter than others. At 36.5 inches, they’re each about the length of an 8-iron.
Related: Learn more about Sterling Irons
All of the sets listed above have one thing in common; they were designed with the sole purpose of being built to a single length. With this trend gaining more interest from the general golfing public the most popular questions are:
- Can single length irons work for me?
- Can I make my current set into a single-length set?
I’m going to explain the differences between a standard set of irons and single-length irons, why it’s difficult to convert a standard set of irons to single length and what is needed to make sure proper gapping is achieved throughout the set.
According to DeChambeau and the team at Edel, his set took many attempts to get just right. And as a club builder who is getting requests for this type of set, it’s difficult to explain the small nuances involved to golfers, especially those players looking to do this to either an existing set or to a new one built from scratch using standard OEM components. It’s also difficult to fit a golfer for this type of set because of the cost associated with having enough club heads of varying lofts to properly fit for distance gapping.
The other piece of information that I don’t believe has been mentioned enough as it pertains to the average golfer is that DeChambeau is a finely tuned athlete who swings his 45-inch driver at more than 120 mph. Most club players can only swing that fast in their dreams, and DeChambeau’s speed gives him a distinct advantage with his irons.
If you give a golfer five clubs of the same length, shaft flex, total weight, and swing weight, they will swing them at almost exactly the same speed. Give that golfer a traditional set of irons that are built with shafts that get approximately 0.5-inches longer as the iron number decreases (with the same shaft, shaft flex, swing weight and a decreasing head weight of 7-to-10 grams per club), however, and they will likely swing each club 2-3 mph faster as they move up the set.
The increased clubhead speed translates into faster ball speeds in the longer irons, which is needed to maintain a consistent peak height from the lower-lofted clubs, also know as a consistent flight window. Smash Factor also slowly increases, because the reduced loft will transfer more energy into the ball (the contact is less “glancing” or oblique), creating faster ball speeds with the longer clubs.
Distance gapping can become an issue in the longer clubs with a single-length iron set, because swing speed does not stay the same as loft is reduced. That’s why DeChambeau’s custom Edel set uses bigger loft gaps (5 degrees) in the longer clubs. Wishon’s Sterling irons do not have this design, but he addressed the issue by making the faces of his long irons “hotter,” which has the same effect.
Here is where things become very difficult from a building perspective. Standard head weights for irons are not designed to be built to the same length. They are engineered for a company’s specific length progression, generally 0.5 inches between clubs.
The chart below demonstrates the difference in club head mass between standard head weights of a set built to roughly D3 and a set of single-length irons.
DeChambeau plays his entire set at 73-degree lie angle, which is more upright than the lie angle of most off-the-rack putters! Trying to bend a set of standard iron heads to these angles would either totally mar the hosels or cause them to break, especially considering many irons now are made of multiple materials and advanced constructions. DeChambeau’s Edel irons, on the other hand, are forged and more easily bent.
It should also be noted that DeChambeau’s irons are manufactured so there is no negative effect on performance. And his extremely upright lie angles are the result of his unique swing mechanics, and are not necessary to use a single-length iron set.
The chart below demonstrates standard lie angles vs. DeChambeau’s Clubs.
Going back to the issue of gapping, with a set of single-length clubs, lofts need to be adjusted accordingly to make sure that golfers have proper yardage gaps between clubs. With any player, the gapping will depending on swing speed.
The Trackman data below shows some interesting information based my testing a set of single-length irons (37.5 inches) and a set of irons built to standard lengths with frequency matched shafts, matching swing weights, and built in 0.5-inch increments.
The conclusion is that single-length irons might be the perfect solution to creating more consistency in your golf game, but just like buying a new driver or standard set of irons, be sure to visit a proper club fitter. It will take some time to find the right components to fit your needs.