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I've got 19" 50th anniversary turbo rims that I love so much that I've bought a second set. (matching trailer) However my issue has been load rated tyres. In the factory 245/35/19 I can only get a 93rating (650kg). Local Bob Jane guy said they upped the Aspect ratio and fitted 245/40/19, 98(750) to a GS ute a while ago and haven't had any clearance issues so far. Speedo is 3.8% off. Also thinking possibly 255/40/19, 100(800kg), 5% off. Specifications for the One Tonner say max rear axle load is 1700kg so if I got to 1600kg worth of tyre rating that's enough for me. I also what the bigger numbers so I can register my trailer with a higher Load capacity. So whos done this before and had experience? How does upsizing affect acceleration, drag times, launching, handeling, cruising revs etc? Considering the same brand/pattern tyres. Also how would I find out the weight rating of the rim itself? The local parts department potatoes aren't that helpful, they couldn't even find my wheels on their system & said they must be an aftermarket option. http://www.tyresizecalculator.com/tyre-wheel-calculators/tire-size-calculator-tire-dimensions http://www.bobjane.com.au/info/load-index-speed-symbol/
