Tom from SWISCO responded:
October 20, 2015
No, the 23-242 and 23-272 are not interchangeable. The 23-242 is meant to only work with convex wheels, while the 23-272 is only meant to work with concave wheels. Whether a wheel is concave or convex does not really make the door roll more smoothly one way or the other; they both perform equally well.
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