I daily drove my 88.5 all stock gearing, spring over, with 31x10.5's 100 miles round trip to work 3-5 days a week for 2 years, plus I wheeled it.... 14,000miles put on the first year... second year was about 7k due to I bought a 87 samurai and kepted that stock until I sold my 88.5
Nothing ever broke or wore out excepted waterpump, and fuel pump.
Plus my 31x10.5 MT's still had about 95% tread left all around... cant say that if your driving something heavy.
