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Lube helps. On my TT-R I'm shoving a 110/80-R17 tubeless tire onto a 1.4" wide rim. Fat guy in a little coat jokes are appropriate. Using Windex, WD40, Silicone grease, etc it will not fully bead up, there is always on spot on each side where the bead stays sucked in slightly. Ever bounce a wheel around with 130psi in the tube? Ru-Glide and it beaded up perfect at 30psi. On my full size motard wheels I only needed around 40psi with Windex to get a full bead using tubes.