Speedplay specific shoes: measurements needed

[prendrefeu]

Fellow WW, need some help here:

Could someone take some measurements of the holes on a Speedplay specific (4-hole) shoe?

Working on a small project and I need to know the locations of the holes relative to each other, on center.
Metric dimensions preferred.

Thanks in advance!

[nspace]

I would do this if I had a set of accurate digital callipers to take the measurements for you. Unfortunately I only have rulers. If no one else has a more accurate way of doing this I would be happy to take some measurements tomorrow.

[prendrefeu]

MM would be fine, so if you've got a ruler with metric that would work too!
I really appreciate this!

[sungod]

haven't got anything to measure true c-c, but i put some screws in, did o-o and subtracted diameter...

front holes 17.5mm c-c

rear holes 23.8mm c-c

front-rear 55.6mm c-c

the holes are symmetric wrt the front-rear centreline of the cleat plate

having said that, from a quick check with a ruler, i think their native dimensions are probably based on 1/16", so the respective lengths become

11/16"
15/16"
2 and 3/16"

[prendrefeu]

Thanks! Super helpful!

[MarkMcM]

having said that, from a quick check with a ruler, i think their native dimensions are probably based on 1/16", so the respective lengths become

11/16"
15/16"
2 and 3/16"

Actually, Speedplay uses the Time TBT 4 bolt pattern, which is in metric units. Dimension of the Time/Speedplay bolt pattern (as well as all the other common bolt patterns) can be found in Sutherland's Handbook:

http://www.sutherlandsbicycle.com/pedals.pdf