275/70/18 pics?
08-03-2014, 02:38 PM
#4
Senior Member
Pictures are nice but topic size being 1.1" larger diameter than OEM, what (if anything) have you guys done about speedo/odo error? I'm ready to replace stock G-Y SRA's but reluctant to mess-up "dead on" gauge accuracy as measured against Garmin gps vs prox 3.4% difference in revs/mile between those sizes... 
08-03-2014, 02:43 PM
#5
Senior Member
I do have a 2inch lift. This is on a 2013 Lariat 4x4 off-road package. with no lift you will need some minor trimming.
As for accuracy, I haven't done anything with mine, but calculations only put me about 5 mph faster than speedo at 65. Eventually, I will get a programmer and change that, but for now I have done nothing.
08-03-2014, 02:50 PM
#6
Senior Member
I do have a 2inch lift. This is on a 2013 Lariat 4x4 off-road package. with no lift you will need some minor trimming.
As for accuracy, I haven't done anything with mine, but calculations only put me about 5 mph faster than speedo at 65. Eventually, I will get a programmer and change that, but for now I have done nothing.
08-03-2014, 03:12 PM
#7
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I've been running 275/70/18 Goodyear Silent Armors since 2 weeks after I bought the truck new. Myself, I had no problems with clearance at all. Since then, I've put a 2" level kit on, and airbags. I like to keep the factory rake, and am going to put a 3" block in the rear very soon. All that, because I feel a slight lift looks good.
What is your biggest concern with the speedo error? With that small of a difference, I don't worry about a ticket, and never had a LEO ever pay any attention to me. As far as fuel mileage, if you don't rely on the "lieometre", and do it by calculator, just add the 3.38% difference to either the miles, or mpg. I think you'll find the loss of mileage as another zero concern.
Just my experience.
LOL, with my Ranger, and running 32's, I'm 9.46% difference. Now with that much, I do keep it mind, and drive accordingly.
Here's a conversion chart some may be interested in.http://www.agcoauto.com/content/plug...peed/calc.html
What is your biggest concern with the speedo error? With that small of a difference, I don't worry about a ticket, and never had a LEO ever pay any attention to me. As far as fuel mileage, if you don't rely on the "lieometre", and do it by calculator, just add the 3.38% difference to either the miles, or mpg. I think you'll find the loss of mileage as another zero concern.
Just my experience.
LOL, with my Ranger, and running 32's, I'm 9.46% difference. Now with that much, I do keep it mind, and drive accordingly.
Here's a conversion chart some may be interested in.http://www.agcoauto.com/content/plug...peed/calc.html
Last edited by johnday in BFE; 08-03-2014 at 03:18 PM.
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08-03-2014, 03:17 PM
#8
Senior Member
That's the size I'm running. 630 revs per mile worked out right for my speedometer correction. Since I already have a tuner it was an easy fix.
08-03-2014, 03:21 PM
#9
Senior Member
Bottom line for me, I just don't get screwing up dead-nuts gauge accuracy for sake of "appearance" of 1" larger tires (or slightly bigger as might fit). But then I am an olde farte... 
