Anyone knows If a 2018 road glide special tires will fit in a 2010 iron 883? They both are 16/19 and 1/4 axles.
The axles should be 25mm. The front of the 2018 road glide special will be wider than the Sportster Iron AFAIK. The rear may fit, the brake disc and pulley are opposite on the 2018 road glide special rear wheel from the Sportster's.
Check on the Wheel/Tire Forum on what's needed, might have better luck there.