I have received yesterday the Formula flip/flop hubs so I can confirm the dimensions since many people build with these hubs (or, System Ex, Ambrosio, IRO, On One, etc, all the same).
Front
P.C.D. 62mm
C - F (outside surfaceS of flange: 71 /2 = 35.5; inside surfaceS of flange: 65.5 /2 = 32.25) average: 33.875
Rear
P.C.D. 62mm
C - F (outside surfaceS of flange: 66 /2 = 33; inside surfaceS of flange: 60.5 /2 = 30.25) average: 31.625
For Center to Flange (C – F) I measured both the distance between the outside and inside surface of the flange and then get the average/mid dimensions.
I have received yesterday the Formula flip/flop hubs so I can confirm the dimensions since many people build with these hubs (or, System Ex, Ambrosio, IRO, On One, etc, all the same).
Front
P.C.D. 62mm
C - F (outside surfaceS of flange: 71 /2 = 35.5; inside surfaceS of flange: 65.5 /2 = 32.25) average: 33.875
Rear
P.C.D. 62mm
C - F (outside surfaceS of flange: 66 /2 = 33; inside surfaceS of flange: 60.5 /2 = 30.25) average: 31.625
For Center to Flange (C – F) I measured both the distance between the outside and inside surface of the flange and then get the average/mid dimensions.
Hope to be useful with some people