Mitsubishi Diamana Thump Iron Shaft Review

By Russ Ryden, Fit2Score, A Dallas Fort Worth Club Fitter & Club Maker
The Golf Center at the Highlands, Carrollton Texas

This is the second release of a Diamana Thump Iron Shaft. The first release, in 2010, was eventually discontinued. At $160 per shaft, or $1280 per set of shafts, there was little interest. I am surprised to see the shaft again being offered. Perhaps PXG’s success at selling uber expensive irons demonstrated there is a market for ultra premium irons.

What exactly do you get at $160 per shaft? Much like an exotic sports car you get light weight strength. I am seeing equivalent steel stiffness with 10 to 15 grams less weigh. I am not referring the the R,S,X denoted on shafts. Those letters are meaningless ways to compare shafts outside of their own particular model. I am referring to area under the EI curve, the only functional method I have seen to rate shaft stiffness. I have to get into the 125 gram range in steel to see a stiffness match to the 2018 Mitsubishi Chemical Thump 105 gram iron shafts. These are truly exotic iron shafts at a truly exotic price. Unless you are comfortable with the stiffness found in something like a 125 gram KBS tour this is not a shaft you can load. But if you are, you have to see what happens when your clubs weigh loses 15 grams. Let’s take a closer look at the numbers.