Titleist 690.MB vs Titleist 731.PM
Side-by-side factory specifications. Differing values are highlighted.
Specification comparison
| Club | 690.MB loft | 731.PM loft | 690.MB lie | 731.PM lie | 690.MB length | 731.PM length |
|---|---|---|---|---|---|---|
| 2 | 19 | 18 | 58 | 61 | 39.25 | 39.5 |
| 3 | 22 | 20 | 58.5 | 61 | 38.75 | 39 |
| 4 | 25 | 23 | 59.5 | 62 | 38.25 | 38.5 |
| 5 | 28 | 26 | 60 | 62.5 | 37.75 | 38 |
| 6 | 32 | 29 | 61 | 63 | 37.25 | 37.5 |
| 7 | 36 | 33 | 61.5 | 63 | 36.75 | 37 |
| 8 | 40 | 37 | 62 | 63.5 | 36.25 | 36.5 |
| 9 | 44 | 41 | 62.5 | 64.5 | 35.75 | 36 |
| PW | 48 | 45 | 63 | 64.5 | 35.25 | 35.75 |
Highlighted cells differ between the two sets. Lofts and lies are factory standard.
Lofts compared
- 690.MB
- 731.PM
What the differences mean
At the 7-iron, the 690.MB is 36° and the 731.PM is 33°, a 3° gap. Each degree of loft is worth roughly 3 to 4 yards of carry at the same swing speed, so the 731.PM should carry roughly 9 to 12 yards further with that club, on a slightly lower, shallower flight than the 690.MB. Across the 9 clubs both sets share, the 731.PM averages 2.4° stronger, with the largest gap at the 6-iron (32° vs 29°). The pitching wedges are 48° and 45°; the stronger one leaves a 5° jump to a 50° gap wedge, which matters when planning wedge gapping. Beyond loft, the 690.MB 7-iron sits 1.5° flatter (61.5° vs 63°), which nudges start direction slightly right for a right-hander; the 731.PM 7-iron is 0.25 inches longer (36.75" vs 37").
Both are blade irons, built for low single-digit handicaps who strike the ball consistently. Compact muscleback irons with minimal offset, thin toplines and the smallest sweet spot — built for shot-shaping over forgiveness. Because they target the same golfer, the decision comes down to the specific loft, feel and shaping differences rather than who the sets are made for.
The 690.MB is listed as forged muscleback and the 731.PM as investment cast blended set - cavity back long irons, muscle cavity mid irons, muscleback short irons. Forging, as in the 690.MB, is generally credited with a softer feel; casting, as in the 731.PM, allows more complex cavity and weighting shapes, which is why it dominates forgiving irons.
Both sets were introduced in 2002, so this is a choice between two models from the same lineup rather than an upgrade: Titleist designed them to sit side by side for different players.
Which should you choose?
The 731.PM is the stronger-lofted set — up to 3° stronger than the 690.MB 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: Titleist 690.MB specs and Titleist 731.PM specs.
Frequently asked questions
Is the Titleist 690.MB stronger lofted than the 731.PM?
No. The 731.PM is the stronger-lofted set: its 7-iron is 33° against 36° for the Titleist 690.MB, 3° stronger and worth roughly 9 to 12 yards of extra carry.
What is the loft difference between the Titleist 690.MB and 731.PM?
At the 7-iron the difference is 3° (36° vs 33°). The largest gap on a shared club is 3° at the 6-iron, and all 9 shared clubs differ.
Are the Titleist 690.MB and 731.PM aimed at the same golfer?
Yes. Both are blade irons, built for low single-digit handicaps who strike the ball consistently. Choose on feel, looks and gapping, ideally after hitting both.
Do the Titleist 690.MB and 731.PM have the same lie and length?
Not exactly. At the 7-iron the Titleist 690.MB is 61.5° lie and 36.75 inches, the 731.PM 63° and 37 inches. Both can be bent or built to your own fit.
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