2R (risers) + 1T (tread) = 25 would indicate 9" treads.

Rule of 17 would indicate 9" treads.
Rule of 18 would indicate 10" treads.

(top posted for your convenience)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Keep the whole world singing . . . .
DanG (remove the sevens)




"Mikepier" wrote in message
ups.com...
I am rebuilding the stairs off my deck in the backyard. If I used
7"
risers it would create some space problems with the total run (
although if push came to shove I could do it). I wanted to use
8"
risers so as to decrease the total run. I know the general rule
for 7"
risers is 11" tread, but what would the tread be for 8" risers?