jponz57

2014 z51 stock front tire size is 245/35/19 i had a 305/35/20 witch caused all abs problems. I put the stock rear tires on and all the codes went away. I just ordered 18 x 10.5 in racestar wheels will i be able to run a 315/35/18 on the rear without throwing the abs codes due to the front and rear wheels not spinning at the same speed?

JMII

315/35/18 is the exact size match to the stock rear Z51 tire size (285/30/20) in terms of height & circumference which is what the computer cares about. You can check here https://tiresize.com/calculator/

However a 315 should really go on a 11.5" wheel not a 10.5" - the tires will balloon outward causing squirm so its not optimized for handling. Might be OK but its outside of what is normally recommended.

jponz57

that calculator says my stock front 245/35/19 is 25.8 and the 315/35/18 is 26.7 is that too far off i think i would be better off with a 305/35/18 its 26.4.

JMII

Your post indicated rears so those are the ones you need to match in height. As long as you keep the stock OEM front you'll be fine.
Rear of 315/35/18 and 285/30/20 are the same height, thus you could switch between those two setups and computer would never know anything changed.

jponz57

i cant find any tires in 315/35/18 besides toyo tq

jponz57

theres more options in 305/35/18 will i have a problem with those?

JMII

Should work but its getting close to the bottom of the recommended ratio I've seen posted around here.
With tire wear it will get smaller so it might start throwing codes once worn down.

This thread might help: https://www.corvetteforum.com/forums...reet-tire.html

jponz57

its .3 off from the rear tire size its a 1.1% difference from the stock rear as well from my understanding, it has to be 4% for there to be a problem