Will I have any problems when I put 35 series tires in back when I already have 30s in front. Im trying to get away for 30s, but I don’t need front tires anytime soon. I tried searching and found nothing that quite answered my question. Thanks in advance guys.

 

You can put a 30 series tire on the front, and a 35 in the rear. Or a 35 series in the front, and a 30 in the rear. Doesnt matter. What matters is the overall tire height.

 

No more than 3/4 inch difference between front and rear or will mess with the abs brake system/tracion control here are some measurments
245/40r18 9.65-w 25.72-h
265/35r18 10.43-w 25.30-h
265/40r18 10.43-w 26.43-h

245/35r19 9.65-w 25.75-h
275/35r19 10.83-w 26.5-h

245/35r20 9.65-w 26.75-h
275/35r20 10.83-w 27.5-h

 

So if I run 245/30/19 up front and 275/35/19 in back will I be ok?

 

This calculator will give you the answer: http://www.dakota-truck.net/TIRECALC/tirecalc.html