One - Pee
One - 3 - Pee
There was a thread on this on TGR, and Spindrift's post is what the company's creator's said, but they also don't seem to have a problem with other pronunciations. It is the name of the cross streets where the factory is located. If you read the logo on their skis upsidedown in looks like "devo." We are not men, we are ON3PO!
Actually it wouldn't solve any confusion.
ON3P is an acronym for "13th and Proctor"
"The project was given the name ON3P Skis (Oh-Ehn-Three-Pea) after the names of the cross streets of the house I lived at in Tacoma (Thirteenth and Proctor = ON(e) 3 P)"