I didn't see any significant markings.
outer wheel diameter is just over 1.125"
inner wheel (center groove to center groove) is approximately 1"
chassis is 1.250" tall x .625" thick and 3.125" long
Sliding door rollers
Handy Person from Osceola, Wisconsin
Feb 15, 2026 6:11 pm
5 user uploaded images
2 Replies
Casey from SWISCO
Feb 17, 2026 12:10 pm
Hello,
Your roller is similar to the 81-166S, but they come with 1-1/4" diameter wheels. You may be able to adjust the height of the housing to compensate for the difference, but we also offer the 81-223 wheel and 81-310 axle kit if needed. Also, note that the housing is a bit wider at 11/16". Review the specifications below and see what you think. Thanks for posting!
Dimensions for 81-166s
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