Sub 70 639 MB vs Sub 70 659 CB
Side-by-side factory specifications. Differing values are highlighted.
Specification comparison
| Club | 639 MB loft | 659 CB loft | 639 MB lie | 659 CB lie | 639 MB length | 659 CB length |
|---|---|---|---|---|---|---|
| 3 | 20 | 20 | 59.5 | 59.5 | 39 | 39 |
| 4 | 22 | 22 | 60 | 60 | 38.5 | 38.5 |
| 5 | 25 | 25 | 60.5 | 60.5 | 38 | 38 |
| 6 | 28 | 28 | 61 | 61 | 37.5 | 37.5 |
| 7 | 32 | 32 | 61.5 | 61.5 | 37 | 37 |
| 8 | 36 | 36 | 62 | 62 | 36.5 | 36.5 |
| 9 | 40 | 40 | 62.5 | 62.5 | 36 | 36 |
| PW | 45 | 45 | 63 | 63 | 35.75 | 35.75 |
| GW | — | 50 | — | 63 | — | 35.5 |
Highlighted cells differ between the two sets. Lofts and lies are factory standard.
Lofts compared
- 639 MB
- 659 CB
What the differences mean
Every club the two sets share has exactly the same loft, starting with a 32° 7-iron. On paper there is no distance or trajectory difference: with the same swing, a 7-iron from either set should launch and carry about the same. The real differences are in how the heads are built, how they look at address and how they feel at impact, none of which a spec table can show. Lie angles and lengths match as well, so any fitting adjustment made to one set would carry straight over to the other.
The sets are built differently: the 639 MB runs 3-iron to PW (8 clubs), the 659 CB 3-iron to GW (9 clubs).
The 639 MB is a blade iron and the 659 CB a players iron, so they sit one step apart on the forgiveness scale. The 659 CB is the more forgiving design, with a wider sole, more offset and more perimeter weighting for roughly scratch to 10 handicaps. The 639 MB 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 MB is listed as forged from a billet with a CNC-milled back and the 659 CB as forged and CNC milled from a single billet. With the build method this similar, differences in feel come down to head size, sole width, topline and offset rather than how the heads are made.
The 659 CB came out 3 years after the 639 MB, 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 639 MB and 659 CB share the same lofts on every club on file, so the difference is in head construction, feel and forgiveness rather than trajectory.
Both charts are reproduced in full on their own pages: Sub 70 639 MB specs and Sub 70 659 CB specs.
Frequently asked questions
Is the Sub 70 639 MB stronger lofted than the 659 CB?
No. Both have a 32° 7-iron and the same loft on every club they share, so neither is stronger lofted. The difference is in construction and feel.
What is the loft difference between the Sub 70 639 MB and 659 CB?
There is none. Every club both sets include has the same loft, including the 32° 7-iron.
Which is better for higher handicap golfers, the Sub 70 639 MB or the 659 CB?
The 659 CB. As a players iron it is the more forgiving design, suited to roughly scratch to 10 handicaps. The Sub 70 639 MB is a blade iron, better suited to low single-digit handicaps who strike the ball consistently.
Do the Sub 70 639 MB and 659 CB have the same lie and length?
At the 7-iron, yes: both are 61.5° lie and 37 inches long.
Shop Sub 70 639 MB
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