I started with the recommended 3/16" gap on mine and flew that way for a while. On first annual condition inspection I noticed the tire had rubbed about another 1/16" away and I trimmed the edges clean. Another year and a half went by and I experienced a flat nose wheel tire on landing, that wiped out about another 1/8" on the clearance and again I just cleaned the edges.
Greg Niehues - PPSEL, IFR, Repairman Cert.
Garden City, TX VAF 2019 dues paid
N16GN flying 380hrs and counting! Built an off-plan 9A with too much fuel and too much HP. Should drop dead any minute now.