Topo Athletic Phantom Road Running Shoe For Women A 30mm x 25mm stack height and 5mm drop makes the new Phantom Topo's most cushioned road running shoe to date. The Phantom is a road shoe that’s just fine on many trails, and the UltraVenture is a trail shoe that’s … Strategically placed … Strategically placed … Topo Athletic Phantom Road Running Shoe For Men A 30mm x 25mm stack height and 5mm drop makes the new Phantom Topo's most cushioned road running shoe to date. Topo Athletic Phantom vs Topo Athletic UltraVenture Jeff: Another similar matchup with a big twist.