summerinmaine Posted March 3, 2009 Share Posted March 3, 2009 Has anyone ever weighed a deflated tire/rim combination, and compared it to the same combination inflated to"normal" specs (e.g. 35psi)? I know that air has weight, and the weight of a particular volume of air depends mostly on temperature and pressure (which, of course, are interrelated). What I don't know, and haven't taken the time to calculate, is whether it's a meaningful amount compared to the overall weight of the tire/rim combination. Anyone know? Link to comment Share on other sites More sharing options...
jeepcoma Posted March 3, 2009 Share Posted March 3, 2009 It's about 25-50 grams depending on the amount of volume of the pocket within the wheel and tire. In other words, insignificant. Link to comment Share on other sites More sharing options...
summerinmaine Posted March 3, 2009 Author Share Posted March 3, 2009 It's about 25-50 grams depending on the amount of volume of the pocket within the wheel and tire. In other words, insignificant. Thanks. The reason I asked was a suggestion from a friend that mounting a deflated spare under the MJ bed would take some weight/strain off of the cable mount, and that didn't make a lot of sense to me. I always carry a high speed/volume air pump with me on desert/Baja trips, so pumping up the spare before installation wouldn't be any big deal. Thus, I wondered if there was any benefit to the suggestion. Link to comment Share on other sites More sharing options...
BLHTAZ Posted March 3, 2009 Share Posted March 3, 2009 The reason I asked was a suggestion from a friend that mounting a deflated spare under the MJ bed would take some weight/strain off of the cable Only if you are inflating it with water :laughin: ;) If you have a cable that is still working, you are one of a rare few. Most, like mine, have broken and been removed by now. Link to comment Share on other sites More sharing options...
deziped Posted March 3, 2009 Share Posted March 3, 2009 Dang (Curse slang), I guess I should start knocking the mud off my spare before I crank it up. Good 3 pounds o mud on it. :doh: Link to comment Share on other sites More sharing options...
garmj Posted March 4, 2009 Share Posted March 4, 2009 You could try inflating the spare with Helium altho it might create rear traction problems. :smart: Hydrogen would also help but if you were in a rear end collision your Mj may end up looking like the Hindenburg. :nuts: Link to comment Share on other sites More sharing options...
tallon2064 Posted March 4, 2009 Share Posted March 4, 2009 I must be under that lucky carrier star :bowdown: , because mine is in working order. Wait I did a cable replacement and rebuild on it a few years back, :dunno: so I'm not sure it counts.:dunno: I do like them despite the possible problems and I've been carrying a 235/75/15 for awhile now, but I do check it regular. Link to comment Share on other sites More sharing options...
jtdesigns Posted March 4, 2009 Share Posted March 4, 2009 I don't understand some of yous... (except you summerinmaine) its a truck.. it has a bed... Throw it in the back and be done with it... :hmm: Link to comment Share on other sites More sharing options...
summerinmaine Posted March 4, 2009 Author Share Posted March 4, 2009 I don't understand some of yous... (except you summerinmaine) its a truck.. it has a bed... Throw it in the back and be done with it... :hmm: Yeah, I don't have that option. Based on the feedback from my companion thread in Tech, I'm going to inspect and lube up the cable, and fit a strap below the tire to serve as a back-up. Link to comment Share on other sites More sharing options...
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