Is it? Or would a killer patch kit account for 95% of problems you might expect. Oddly I've never gotten a flat while wheeling and thus never had to use the spare. My biggest worry is popping a bead, in which case my Viair portable probably isn't going to help much. I'd love to lose the weight and gain the space though. Stupid thing to do?
get a nice work bag from homedepot or wherever and toss the following in it:
a GOOD tire plug kit, like a "pro" set or heavy equipment set.
some LARGE self vulcanizing patches
BIG ASS can of fix a flat
can of starting fluid and matches/lighter
50' of stainless safety wire
2 tire spoons from harbor frieght
extra valve stems/cores/remover in a ziplock
big ass ratchet strap
I can fix most any tire short of you tearing it in half with that kit.
normal holes? plug kit/fix a flat
biger holes? more plugs
big ass hole? pop the bead and use a patch
big ass tear? stich it with safety wire, patch the inside, use lots of plugs
popped bead? attach aire comp to valve and be ready, spray starting fluid around rim and some in tire making a stream going away from tire, light stream, WHOOOMP!!! tire will seat from rapidly expanding fireball, start filling tire NOW NOW NOW (the hot air will cool and contract and will suck the bead back off unless you fill up the tire) or use the ratchet strap.