LINY4Runner
New member
cool! i was gonna try rotating them too, cause I don't feel it in the back
Warning: OME + Sequoia wheels + 285's = serious UCA rubbing
- Thread starter LINY4Runner
- Start date
cool! i was gonna try rotating them too, cause I don't feel it in the back
240m3srt
New member
Mine vibrates around 50mph, how about yours?
I have 35's. Keep in mind you can have custom spacers made from 3/4" on up, hub and lug centric. You can even have adapters that change the bolt pattern, i had a set built for the crossfire. Just FYI...
LINY4Runner
New member
mine's between 55-60 on the speedo, which is around 65-70 actual speed
240m3srt
New member
Mine is 50mph on the speedo, 60mph or so actual. I have the hub and lug centric spacers (but not the spidertrax), i needed 1.5" insted of 1.25".
What are you thinking about doing for the vibration?
LINY4Runner
New member
I'm gonna start with rotating the spacers. If that doesn't work I may have to run the spacers on a balancer and do some drilling to balance them.
trd_4runnin
New member
Your speedometers shouldn't be even close to that far off. We checked mine against the GPS on the way home from Cleveland the other day. When my speedometer read 58, the GPS had it at 61.
For the record, I had zero vibrations with my spidertrax spacers.
LINY4Runner
New member
thats how I know my speed, with my GPS.
I know 60 on the clock is 69 real-speed
48 on the clock is 55 real
26 is 30
Duhockey
Senior Member
I thought a good way to figure it is to add just about 10% ur speed..
240m3srt
New member
I ran side by side with my friends 2006 Hyundai, when my speedo said 70 his said 80-82.
Now if i could just figure out the one simple wire that the Dakota Digital calibrator connects too.:sadwave:
LINY4Runner
New member
JohnsD90
New member
You gotta remember the LINY started out with 15's and he is now at 17's. Thats why he is further off now.
trd_4runnin
New member
I'm running 285s and no body lift and can stuff both the front and the rear. I did do a fair amount of trimming/beating the hell out of the pinch weld with a hammer, but its not excessive by any means. I rub on the frame but that's it and a body lift wouldn't solve that anyways.
It's not rim size that matters, it's overall diameter of the rim and tire. If he had the 15s with the 225s on then his probably is off a few more mph than mine but it still should be off by 10 mph... unless your going 120.
trd_4runnin
New member
Some small amount of human and/or speedometer error could result in a slightly skewed number. Mine was checked against GPS, and while there could be error there as well I would trust it over your method. Also, if your speedometer really was 10mph at 80 mph, its not going to be 10 mph off at 60 mph. It will be more of a percentage thing rather than a magical number. If your speedo says 20, you aren't going 30. Maybe you guys are right and GPS is wrong, but I have never heard of anyone else recording a 10 mph difference running 285s at highway speeds.
240m3srt
New member
Im on 35's not 285's, but i still agree with you its more a % thing. Its obviously not as far off at lower speeds.
I am having the calibrator installed by a local shop and i planned to calibrate it via gps. I know this is probably a pretty basic thing but how do you find out your speed from a portable gps unit? My dad has a 4th gen with some kind of built-into-the-dash factory removable gps and thats what i plan to use.
Sorry to hi-jack your thread Liny just wondering if someone could help. If its not a simple answer i will start a new thread.:hiding:
LINY4Runner
New member
keep in mind that speedometers are normally between 4-6 MPH fast also!
trd_4runnin
New member
I thought those looked like 35's in your avatar but wasn't sure. I'm honestly not sure how to do it. The TomToms that we use at work always show your speed on the main screen while you are driving, and the one we checked mine against was my brother's Garmin and I'm not sure what he went into to get the speed. Either way, I'd be interested to know your results.
crackiswack
New member
Just to straighten up some of the confusion about speeds and tire diameters here, all it takes is to run the numbers through a tire size calculator.
If your vehicle originally came with 225/75/15, and are now running 285/70/17, then your speedometer is off by ~15.6%, for 285/75/16 you are off by 16.1%.
225/75/15 vs. 285/70/17
actual speedometer
81 70
69 60
58 50
46 40
80 69
70 61
60 52
50 43
If instead you had the more common 265/70/16 OE size, then you are only off by 6.8 and 7.1% respectively
265/70/16 vs. 285/70/17
actual speedometer
75 70
64 60
53 50
43 40
80 75
70 65
60 56
50 47
So indeed at 70mph on your speedometer, your gps should be showing 80-82mph, whereas if you started with the larger OEM size, then the differences between speeds will usually be less than 10mph
If your vehicle originally came with 225/75/15, and are now running 285/70/17, then your speedometer is off by ~15.6%, for 285/75/16 you are off by 16.1%.
225/75/15 vs. 285/70/17
actual speedometer
81 70
69 60
58 50
46 40
80 69
70 61
60 52
50 43
If instead you had the more common 265/70/16 OE size, then you are only off by 6.8 and 7.1% respectively
265/70/16 vs. 285/70/17
actual speedometer
75 70
64 60
53 50
43 40
80 75
70 65
60 56
50 47
So indeed at 70mph on your speedometer, your gps should be showing 80-82mph, whereas if you started with the larger OEM size, then the differences between speeds will usually be less than 10mph
JohnsD90
New member
Rim size does matter though, a 265/70/R17 will equal a 265/75/R16, there is a difference, i know what i am saying.
crackiswack
New member
doesn't further prove that overall diameter is what is important and not rim size? Your original post said this
JohnsD90 said:
I get what you are saying because if your vehicle originally came with 15" wheels, then they were mounted with 225/75/15 compared to the 16" wheels with 265/70/16, but then the 17" wheels LINY is running aren't running the OEM sized tires anymore so you aren't being consistent in your comparison.
