I received my new 16 tooth sprocket today and attempted to install it. I assumed the sprocket nut would be a metric size. I attempted to use a 27mm socket I had on hand and it doesn't seem to fit as tight as I would like. I was afraid that I would strip the nut. Does anyone know what size socket is required for this nut. I saw elsewhere that a 1 1/16 inch socket had been used. Is this the ticket or is a 26mm what is needed.