Sub 70 639 CB vs Sub 70 649 MB Tour
Side-by-side factory specifications. Differing values are highlighted.
Specification comparison
| Club | 639 CB loft | 649 MB Tour loft | 639 CB lie | 649 MB Tour lie | 639 CB 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 | 44 | 46 | 63 | 63 | 35.75 | 35.75 |
Highlighted cells differ between the two sets. Lofts and lies are factory standard.
Lofts compared
- 639 CB
- 649 MB Tour
What the differences mean
At the 7-iron, the 639 CB 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 CB 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 1.9° weaker, with the largest gap at the 4-iron (22° vs 24°). The pitching wedges are 44° and 46°; the stronger one leaves a 6° jump to a 50° gap wedge, which matters when planning wedge gapping.
The 639 CB is a players iron and the 649 MB Tour a blade iron, so they sit one step apart on the forgiveness scale. The 639 CB is the more forgiving design, with a wider sole, more offset and more perimeter weighting for roughly scratch to 10 handicaps. The 649 MB Tour trades some of that for a more compact head, thinner topline and more control over flight and shape, which suits low single-digit handicaps who strike the ball consistently.
The 639 CB 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 came out 2 years after the 639 CB, 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 649 MB Tour is the weaker-lofted set — up to 2° weaker than the 639 CB. 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 CB specs and Sub 70 649 MB Tour specs.
Frequently asked questions
Is the Sub 70 639 CB stronger lofted than the 649 MB Tour?
Yes. The Sub 70 639 CB 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 CB 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.
Which is better for higher handicap golfers, the Sub 70 639 CB or the 649 MB Tour?
The Sub 70 639 CB. As a players iron it is the more forgiving design, suited to roughly scratch to 10 handicaps. The 649 MB Tour is a blade iron, better suited to low single-digit handicaps who strike the ball consistently.
Do the Sub 70 639 CB 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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