Joined: Jul 2015
Posts: 7,159
Likes: 3,104
From: NW Oregon
Bikes: 1982 Trek 930R Custom, '91 Diamondback Ascent w/ XT, XTR updates, Fuji Team Pro CF road flyer, Specialized Sirrus Gravel Convert, '09 Comencal Meta 5.5 XC, '02 Marin MBX500, '84 Gitane Criterium bike
be aware that you must take extra care during installation of the tires... the extra inner tube will try to get pinched under the tire bead.
it will help to partially inflate the tube... a bit less than fully shaped.... or, since the tube is too big for the tire, even less than that... then slip the tube into the tire, line up/feed the stem into the rim, and put the first bead in at the same time, between the rim and valve stem... use your hands as much as possible to install the first bead, and then the second bead...MOST tires can be installed with NO tire iron use. if you keep the beads pinched into the rim's valley.