Red Oak Unfinished Traditional Right Return Stair Tread 42 in

You’re looking for a double return tread. Double returns are sold by the throat length, which is the length between the two returns on the back of the tread.

These are the standard 1” double return oak treads:
https://www.stair-treads.com/double-return-traditional-1-red-oak-stair-tread-prefinished-natural-or-stained.html


And these are the retro-fit double return treads:
https://www.stair-treads.com/double-return-retro-fit-red-oak-stair-tread-prefinished-natural-or-stained.html


This link better exmplains “throat length”:
https://www.stair-treads.com/faq/standard-stair-tread-dimensions.html

And more information on types of staircases is available here:
https://www.stair-treads.com/types-of-staircases

If you don’t see the throat length you need, give us a call at (866) 429-0979 and we can configure it for you