Dave Sr. from SWISCO responded:
May 13, 2021
The stainless steel roller 81-173 has a 1-1/4" diameter wheel and the housing is 11/16" wide with a flare width just under 7/8". The 81-174 roller has a wheel diameter of 1-1/8", with a housing width of 5/8" and a flare width of 7/8". Take a look at both to determine which roller housing fits your door best. |