motoxdirtrider84

I just purchased a set of 19 x 8.5 for the front and 19 x 9.5 in the back. I wanted to go with 275 in the back and 245 in the front, but I am not sure about the middle number. Do i keep the second the same for all 4 tires? I found 245/35/19 for the front but I am not sure what i should get the back, they have 275/35/19 and 275/30/19. By the way, I am looking at NT555's. Thanks and sorry I am sorta a noob with tires and rims.

drbobvs

For the front you can go with 235/45 or 245/45 if you want to get as close to stock height as possible. For the rear, if you want to keep your speedo calibrated, then you need 275/35.

Rule of thumb is for every 20mm in width/ reduce your aspect ratio by 5. Likewise, for every inch increase in rim diameter, also reduce your aspect ratio by 5. This is to keep the original tire height.