Originally Posted by
dw01
dddd, thanks for the inputs. Some very valuable information.
I have to winder ho many people who indicate above that 1¼ inch tires on 14mm gap width rims are ok actually measured the tire width. Notably, an old set of IRC "Road Winner Duro II" 27x1¼ tires that I have on another bike actually measure 27.9mm (1.1 inch) wide at max inflation on 18-19 mm (70's steel Ukairim) rims. I also wonder how many who mention that they have been running the referenced combination are at or near max inflation pressure.
Dude, millions of people had 2" mountain bike tires on 14mm inner width rims. What are you talking about?
Your tire blew off because it was a crap tire with bad dimensions, not because of 2mm per side of rim width.