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View Full Version : 33's+speed ? 99x33 02-26-2007, 12:08 AM I was woundering since I have not yet got the chance to have my speedo recalibrated, how much would the speed be off. I used a tire calculator and came up with a 8mph diffrence. I have 33-12.5 r15 wild countrys on a 15-10 rim. I have to take the truck on a 2 hr drive tommorrow to the dealership that will re-cal it and will be doing some highway drving. Does the 8 mph number sound correct? I had 235-75-r15 stock on my 99 FROADER 02-26-2007, 12:13 AM If you have stock gears and they are 3.73s you'll be going faster than it shows by 5%. 99x33 02-26-2007, 12:19 AM Thanks, so realy its only off by say 3 mph than. FROADER 02-26-2007, 12:27 AM It's off by 5% the whole way through. sooo... If it says you're going 25 you're really going 26.5. If it says you're going 50 you're really going 55. If it says you're going 65 you're really going 73.25. :) colindo94 02-26-2007, 12:41 AM I have 33's and mine is off about 9 mph at 65 mph. So if Im on the freeway going 75mph the speedo shows about 66mph. I dont know if this helps at all. Kinserin 02-26-2007, 08:13 AM With my 33s and 3.55s Im out roughly 10kph, or 6mph. So just drive a tad below and everything should be fine as far as speeding is concerned. omega 02-26-2007, 10:57 AM Sorry for the question. But with WHAT do you recalibrate the speedo? X-Cal? Are there other way's to recalibrate the speedo? Kinserin 02-26-2007, 06:23 PM First gens I believe are just recalibrated via the speedo gear in the tcase. As to what tooth gear you need for what setup.. I have no idea. ExplorerDMB 02-26-2007, 06:47 PM omega - look in the stickies and you'll find information on recal dtl 2k2 sport 02-26-2007, 08:55 PM just put 33's on mine 2 months ago, ,, love the ride , and look! But yeah i'm about 8mph off at 65 as well. Just look out behind ya once in a while to see if there's a cop in view. :) omega 02-27-2007, 04:08 AM omega - look in the stickies and you'll find information on recal :thumbsup: |