smo Posted June 27, 2007 Share Posted June 27, 2007 Can anyone tell me what is the min rim width for 10.5", 12.5" and 14.5" wide tyres? Quote Link to comment Share on other sites More sharing options...
Guest diesel_jim Posted June 27, 2007 Share Posted June 27, 2007 Some info on the BFG tyre site Quote Link to comment Share on other sites More sharing options...
smo Posted June 27, 2007 Author Share Posted June 27, 2007 Anyone else got info, doesnt seem to cover anything other than 12.5" on the BFG site Quote Link to comment Share on other sites More sharing options...
SteveG Posted June 28, 2007 Share Posted June 28, 2007 Can anyone tell me what is the min rim width for 10.5", 12.5" and 14.5" wide tyres? 10.5" - 7-9" 12.5" - 8.5-11" 14.5 - 10-12" Remember, if you add beadlocks they add to rim width. Cheers Steve Quote Link to comment Share on other sites More sharing options...
Lewis Posted June 28, 2007 Share Posted June 28, 2007 You can run fairly wide tyres on narrow rims without too many issues Example: Andrews 102" runs 12.50's on 7" disco steel rims Another Example: DD's G running 10.50 Simex on 5.5" rims Lewis Quote Link to comment Share on other sites More sharing options...
Lewis Posted June 28, 2007 Share Posted June 28, 2007 Also check out the Interco Tire site, they list the recommended rim size for each of their tyres Interco Lewis Quote Link to comment Share on other sites More sharing options...
BogMonster Posted June 28, 2007 Share Posted June 28, 2007 You can run fairly wide tyres on narrow rims without too many issuesExample: Andrews 102" runs 12.50's on 7" disco steel rims Apart from the tyre carcass splitting around the middle I have seen this on loads of BFG 265/75R16 fitted to 5.5in steel rims. I wouldn't run 12.50s on 7" rims for that reason, at least not on road at high speed. Second set of tyres for off road use would be fine I expect but it forces the tyre carcass out of its intended shape and causes a circumferential split which goes right the way round the carcass. I used to have a photo of one somewhere but I can't find it Quote Link to comment Share on other sites More sharing options...
Lewis Posted June 28, 2007 Share Posted June 28, 2007 Apart from the tyre carcass splitting around the middle At 10psi on an offroad only vehicle I'm not concerned Quote Link to comment Share on other sites More sharing options...
BogMonster Posted June 28, 2007 Share Posted June 28, 2007 At 10psi on an offroad only vehicle I'm not concerned No but I am just saying that it shouldn't be taken as being OK to do on a road vehicle Helpfully I found the photos I had which were on the PC at work, this is what happens when you run wide tyres on narrow rims on the road: these were about half worn BFG MT's, 265/75R16 on 5.5" Defender steels - doesn't take much imagination to visualise that this would have resulted in a hell of a bang and a two-piece tyre before too much longer Quote Link to comment Share on other sites More sharing options...
Bull Bar Cowboy Posted June 28, 2007 Share Posted June 28, 2007 At 10psi on an offroad only vehicle I'm not concerned Generally but not always, by running very wide tyres on narrow rims you get too much tyre wall bulge on the outside of the rim, thus making them very prone to serious sidewall damage............ Ian Quote Link to comment Share on other sites More sharing options...
SteveG Posted June 28, 2007 Share Posted June 28, 2007 Generally but not always, by running very wide tyres on narrow rims you get too much tyre wall bulge on the outside of the rim, thus making them very prone to serious sidewall damage............ Ian and popping off the rim as the bead is not seated properly Quote Link to comment Share on other sites More sharing options...
Lewis Posted June 28, 2007 Share Posted June 28, 2007 Generally but not always, by running very wide tyres on narrow rims you get too much tyre wall bulge on the outside of the rim, thus making them very prone to serious sidewall damage............ Ian Thanks for your concerns but that has not been a problem thus far and popping off the rim as the bead is not seated properly Bead being not seated properly is due to poor/incorrect fitting on the part of the tyre fitter Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted June 28, 2007 Share Posted June 28, 2007 That's what my local tyre guy told me when I asked him to put my 9.00x16's on Disco steels (7") although I think he was being over-dramatic as they seem to fit fine - he told me Petlas were military tyres and would cause the Disco rims to explode and kill me Needless to say I took them up the road to Protyre who, despite seeming a tad chavvy, were more than happy to fit them, and even grind out the valve holes to take tube valves. Quote Link to comment Share on other sites More sharing options...
smo Posted June 28, 2007 Author Share Posted June 28, 2007 Hmm, so fitting 12.5's to 7" rims is a little optomistic then....gonna have to find some new rims now! Quote Link to comment Share on other sites More sharing options...
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