Diameter is equal to the height of the sidewall times 2 (since the sidewall is on both sides of the rim) plus the rim diameter. And the size gives you all the info you need to calculate the sidewall height. 265/50-20. 265mm x 50% = 132.5mm sidewall height. 132.5mm/25.4mm/in = 5.22" sidewall height. So overall diameter of the tire is: Check the tables below to get all tire sizes, wheel sizes, bolt patterns (PCD), rims offset, and tire pressure. The 2021 Jeep Grand Cherokee tire sizes are 245/70R17, 265/60R18, 265/55R19, 265/50R20, 275/50R20, 295/45R20, 275/45R21, 295/40ZR21, 305/35ZR22. The 2021 Jeep Grand Cherokee bolt pattern is 5x127. For more info check the size tables Older Jeeps like CJ, YJ, TJ, and XJs for example, take a decent size lift just to run a size tire that now comes factory on JK or JL Rubicon Wranglers. For those newer versions, moving from stock to 35-inch tires mainly requires a small suspension lift and wheels, or wheel spacers to get the proper backspacing. Commercial Vehicle. 245. This number indicates that your tire has a width of 245 millimeters. 17. The tire size was designed to fit rims or wheels that are 17 inches in diameter. 105. This tire has a load index of 105, which means it's capable of carrying a load of 2035 pounds (925 kg) or less. I wouldnt recommend going any bigger than a 32 without regearing. As for the lift it all depends on how high you want to go and what size tires you want to run. 1999 WJ, 4" BDS Suspension Lift, Cragar 342 Series Wheels, Westin Front Brush Guard, 265/75/r16 Cooper STT's FOR SALE!! 1955 Willy's M38A1 Project. Save Share. 2017 Jeep Grand Cherokee Tires. 2017 Jeep Grand Cherokee tires are an important component of the 2017 Jeep Grand Cherokee vehicle, as they provide the necessary grip and traction needed for peak performance. When choosing tires for a 2017 Jeep Grand Cherokee, it is important to consider the type of driving that the vehicle will be used for, as [BIGMEL I put some firestone destination MT 265 70 17 as well with a 1.5" spacer i needed to hammer and trim the plastic under the jeep to stop some really annoying rubbing. Before the spacer however, the tire would rub against the ball joint studd and rub slightly on the inside wells. plus handling was compromised. 06-24-2009 05:12 PM] 1139 Results. If you drive your Jeep on paved roads more than dirt trails, but still want excellent off road capability when you hit the dirt, than an all-terrain tire is the choice for you. Most all terrain tires feature a tighter tread lug pattern, with lots of grooves and siping which work really well on both dry and wet pavement. Hey guys, I usually make one big change a year on my jeep, and this year, it's time to replace my tires. I recently installed the RRO 2.5" BB lift, as well as some 1.5" wheel spacers, and I'm looking for the max size tire (mostly highway/street, but looking to start doing a fair amount of trail/mud riding and looking for extra grip and clearance) I can put on the stock rims with this new setup August 27, 2015. Tweet. If the ring and pinion and/or tire size has changed on your Jeep vehicle, then you will want to replace the factory speedometer gear with the corresponding gear on the chart below. The chart lists the gear ratio and tire diameter to easily guide your purchase into the correct size application. mjH3H.