Currently i have 235/55/R19 on my RX but was wondering can i get 245/50/R19??

Will there be any issues?

Thanks

 

The 245 @ 28.6" is slightly shorter than the 235 @ 29.2".
Not sure how the speedo receives it's signal but you may see a minute (2-3%)difference in speedo accuracy.

 

What does this mean sorry? Will it be safe?

Thanks

 

The tire height of the tire relates to the circumference of the tire, eventually leading to the number of revolutions per mile. This is why I noted a possible small difference in speedo vs. actual speed.
Check with Lexus about the widest tire you can mount on your rims.
Otherwise, no issues.

 

You want 255/50/19 which is almost exactly the same diameter as the stock 235/55/19. There is only one tenth of a millimeter difference in size and that is so little that given manufacturers design differences and manufacturing tolerances, they are the same diameter.

The wheel design widths acceptable for this size are 7 to 9 inches. The factory wheel is 7.5 inches. They will fit.
You can find such charts all over the internet.

 

I can confirm that 255 will clear suspension components. I run 255s on an 18x8" wide rim as my winter set.