more dimensions

Thanks for posting. The dimension from the wheel to edge of the carriage for the 81-163 is approximately 3/16". I am afraid we don't have any digital files for this roller beyond the dimensions listed on the product page. Since you're doing a custom project too, I should advise that the 81-163, like all of our rollers, was meant to replace an existing market roller, for existing standard doors. Since they weren't really designed with custom projects in mind, I can't really guarantee how these parts will work for you. We do sell universal patio door tracks that work with all our rollers: see our 80-105 and 80-106. Let us know what you think, and good luck with your project!