Sub 70 639 MB vs Sub 70 649 MB Tour
Side-by-side factory specifications. Differing values are highlighted.
Specification comparison
| Club | 639 MB loft | 649 MB Tour loft | 639 MB lie | 649 MB Tour lie | 639 MB length | 649 MB Tour length |
|---|---|---|---|---|---|---|
| 3 | 20 | 21 | 59.5 | 60 | 39 | 39 |
| 4 | 22 | 24 | 60 | 60 | 38.5 | 38.5 |
| 5 | 25 | 27 | 60.5 | 60.5 | 38 | 38 |
| 6 | 28 | 30 | 61 | 61 | 37.5 | 37.5 |
| 7 | 32 | 34 | 61.5 | 61.5 | 37 | 37 |
| 8 | 36 | 38 | 62 | 62 | 36.5 | 36.5 |
| 9 | 40 | 42 | 62.5 | 62.5 | 36 | 36 |
| PW | 45 | 46 | 63 | 63 | 35.75 | 35.75 |
Highlighted cells differ between the two sets. Lofts and lies are factory standard.
Lofts compared
- 639 MB
- 649 MB Tour
What the differences mean
At the 7-iron, the 639 MB is 32° and the 649 MB Tour is 34°, a 2° gap. Each degree of loft is worth roughly 3 to 4 yards of carry at the same swing speed, so the 639 MB should carry roughly 6 to 8 yards further with that club, on a slightly lower, shallower flight than the 649 MB Tour. Across the 8 clubs both sets share, the 649 MB Tour averages 1.8° weaker, with the largest gap at the 4-iron (22° vs 24°). The pitching wedges are 45° and 46°; the stronger one leaves a 5° jump to a 50° gap wedge, which matters when planning wedge gapping.
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 639 MB is listed as forged from a billet with a CNC-milled back and the 649 MB Tour as forged muscle back with rear port and tungsten toe weight. The 649 MB Tour adds tungsten weighting, which lowers the centre of gravity and raises stability on mis-hits, helping the long irons launch. The 649 MB Tour's muscle-back shape keeps mass directly behind the strike for feedback and control, where a cavity spreads it to the perimeter for forgiveness.
The 649 MB Tour arrived 2 years after the 639 MB, a typical one-generation refresh. Changes over that span are usually incremental: refined face thickness, revised weighting, updated looks and small loft tweaks rather than a new concept. Here the 7-iron loft moved from 32° to 34°.
Which should you choose?
The 649 MB Tour is the weaker-lofted set — up to 2° weaker than the 639 MB. That trades raw distance for a steeper landing angle and more predictable stopping power into greens.
Both charts are reproduced in full on their own pages: Sub 70 639 MB specs and Sub 70 649 MB Tour specs.
Frequently asked questions
Is the Sub 70 639 MB stronger lofted than the 649 MB Tour?
Yes. The Sub 70 639 MB 7-iron is 32° against 34° for the 649 MB Tour, 2° stronger, which is worth roughly 6 to 8 yards of extra carry with the same swing.
What is the loft difference between the Sub 70 639 MB and 649 MB Tour?
At the 7-iron the difference is 2° (32° vs 34°). The largest gap on a shared club is 2° at the 4-iron, and all 8 shared clubs differ.
Are the Sub 70 639 MB and 649 MB Tour 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 Sub 70 639 MB and 649 MB Tour have the same lie and length?
At the 7-iron, yes: both are 61.5° lie and 37 inches long.
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