Well, isn't that a happy little question! When we see "25 R7" in division, it means 25 divided by 7. The "R7" part represents the remainder of the division, which in this case would be 4. So, 25 divided by 7 equals 3 with a remainder of 4.
101.4
2.3333
212
14.2917
roll r79 no 25
If I'm honest very, very little. The r7 425 and the r7 superquad are virtually the same driver. The superquad has a black head where the r7 425 is just metallic.
1
5
25
25
The first is divided by one, then divided by two, then divided by three, then divided by four, and so on.