Which front wheel, 18″ or 21″?

Hello together, With my Deuce the front tire (21th cutting disc, 8cm width) is soon due to change. Time to play with the thought whether to rebuild. I am now torn between the two possibilities back and forth:3×21″ rim with 120/60/21 tires18 ” rim with 130 he tires smaller wheels are not possible for me, already seen, did not like me at WideGlide /Deuce forks. So what do you think? Gruss swissandy