1987 com 4X Posted March 31, 2020 Share Posted March 31, 2020 What are the largest, functional tires that I can install on my factory 1987 4.0 mj??? Link to comment Share on other sites More sharing options...
89 MJ Posted April 1, 2020 Share Posted April 1, 2020 31s with stock wheels Link to comment Share on other sites More sharing options...
88towmanche Posted April 1, 2020 Share Posted April 1, 2020 31's on factory rims - does have about 1-3/4 budget boost but wasn't necessary for clearance. WJ LCA's were necessary Link to comment Share on other sites More sharing options...
Pete M Posted April 1, 2020 Share Posted April 1, 2020 30s fit with no concerns whatsoever. 31s with the good possibility of rubbing at full lock (can be fixed with the WJ arms) stock rims are required for 31s or you will be rubbing those 31s on the flares. probably pretty bad depending on the backspacing. Link to comment Share on other sites More sharing options...
benjy_26 Posted April 18, 2020 Share Posted April 18, 2020 I have stupid deep backspacing and rub pretty hard in some situations with my 31's and 2.5" of lift. Keep the stock rims. Link to comment Share on other sites More sharing options...
AZJeff Posted April 18, 2020 Share Posted April 18, 2020 On 4/1/2020 at 7:33 AM, 88towmanche said: 31's on factory rims - does have about 1-3/4 budget boost but wasn't necessary for clearance. WJ LCA's were necessary That's a nice looking truck!! Link to comment Share on other sites More sharing options...
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