Specification comparison

Highlighted cells differ between the two sets. Lofts and lies are factory standard.

Lofts compared

What the differences mean

At the 7-iron, the MX-900 is 34° and the MX-100 is 33°, a 1° gap. Each degree of loft is worth roughly 3 to 4 yards of carry at the same swing speed, so the MX-100 should carry roughly 3 to 4 yards further with that club, on a slightly lower, shallower flight than the MX-900. Across the 7 clubs both sets share, the MX-100 averages 1° stronger, with the largest gap at the 4-iron (24° vs 23°). The pitching wedges are 46° and 45°; the stronger one leaves a 5° jump to a 50° gap wedge, which matters when planning wedge gapping.

The sets are built differently: the MX-900 runs 3-iron to PW (8 clubs), the MX-100 4-iron to SW (9 clubs).

The MX-900 is a game improvement iron and the MX-100 a super game improvement iron, so they sit one step apart on the forgiveness scale. The MX-100 is the more forgiving design, with a wider sole, more offset and more perimeter weighting for high handicaps, beginners and slower swing speeds. The MX-900 trades some of that for a more compact head, thinner topline and more control over flight and shape, which suits roughly 10 to 25 handicaps.

The MX-900 is listed as forged, hollow-bodied long and mid irons with tungsten sole weights, mid-cavity short irons and the MX-100 as investment cast hybrid-iron set with Y-Tune weighting. Forging, as in the MX-900, is generally credited with a softer feel; casting, as in the MX-100, allows more complex cavity and weighting shapes, which is why it dominates forgiving irons. The MX-900's hollow body lets the face flex more and moves mass low and outward, usually giving higher launch and more ball speed on off-centre strikes than the MX-100, at some cost in feel. The MX-900 adds tungsten weighting, which lowers the centre of gravity and raises stability on mis-hits, helping the long irons launch.

The MX-100 came out 2 years after the MX-900, but it is a different line rather than a direct replacement, so the two were designed for different golfers as well as different seasons.

Which should you choose?

The MX-100 is the stronger-lofted set — up to 1° stronger than the MX-900 on matching clubs. Expect longer carry per numbered iron but a flatter descent angle; gapping at the wedge end is where that shows up.

Both charts are reproduced in full on their own pages: Mizuno MX-900 specs and Mizuno MX-100 specs.

Frequently asked questions