Mtandle

I have the grl10 f spor . I put a set of 20" wheels and tires
245/40/20 and 275/35/20. A total of 1.4 in difference in overall circumference Where do I go to get speedometer calibrated??

bclexus

If you are hoping to change something so your speedometer is accurate, I do not believe that is possible...like changing a plastic gear in the speedometer cable.

Mtandle

Definitely not doing that ty

chinee

Why did you use those sizes, were they recommended by a shop? They are "much" larger than stock (much be a subjective term). I think you posted about rubbing a while back, right? On a box in the fender area?

Your difference in circumference is much more than 1.4", I think you mistakenly referenced the difference in diameter; the difference in circumference is 4", pretty significant, as you found with the rubbing. And you raised your ground clearance by almost 3/4'.

But with that said, if it works and you like the look... kudos. And your speedo is off by just 3 mph at 60mph, you've just got to keep minus-ing between 2-4 mph when you look at your speedo. On the other side of the spectrum, actual miles driven, your odometer will read low, for every 1,000 miles you actually drive, the odo will reflect only 950 or so.

Post some better daytime pics, I's really like to see the look.

Cwang

I wouldn't worry about it, the speedo (my speedo) reads so far out that increasing the size may come close to getting an accurate reading!

uibalnme

245/35/20 and 275/30/20 would have been the best choice. This would have kept the overall diameter nearly the same as stock and not affect the speedometer reading.

However, the ride quality gets worse as the sidewall gets shorter.