I hate to be the bearer of bad news, but that size you listed as being the largest, is a smaller diameter than the stock FDII tire/wheel combo.....

Specification_Sidewall__Radius_Diameter_Circumference_Revs/Mile_Difference
215/65-17______5.5in____14.0in____28.0in______88.0in_________720_______0.0%
225/45-19______4.0in____13.5in____27.0in______84.7in_________748 ______-3.7%


Do you have a list of all programmable sizes?

 

Well, that's why I added for "my" 2010 4x4 model. They hooked my Patriot up to the computer, and let the software do it's thing. They called me into the service area when it was done, and there was a menu that showed available options for my Patriot. 19 was the absolute maximum size on the list, so that's the size I wrote down.

FDII might be different, but if so, I would probably have to upgrade to that package and pay all kinds of money, just for another inch on my rims. I just did a quick search, and found 20" tires that are the same diameter as the 19's they told me, so I think it should work out for me.

 

You can do that. I did it in reverse. I put the 16" wheels on my Patriot, but with 215-75R16 tires. Then I had my dealer tell the computer that he car had the 17" wheels with the largest factory tires. My speedometer is almost correct. The diameter difference is about 1/2". The only thing the computer cares about is the diameter of the outside of the tire. You could put 26" wheels on there and a tire only an inch high if you wanted to as long as the total diameter is close to a known size the computer can be programmed to.

 

Yup. I think you're right. I'm probably going to go that route, because 19 inch wheels have limited options. I just really want nice black wheels.

 

19" is a rim size, not a tire size and we sort of already knew they couldn't correct the speedo for anything larger then 215/65R17. So you'll need to go aftermarket to correct the speedo, but no one does anything for the patriot for that right now. Although I think you can do it with a scangauge and the MPH reading.

 

I put the tire size in the post. 225/45R-19 That is a tire size. That is the biggest size allowable on my Patriot, and probably most of them -- As I see that FDII and FDI might be different.

If you stay with the factory tire size options, they can program the speedometer, odometer, ABS, etc to work correctly.

 

My understanding is that all Patriots can be programmed to the FDII tire size 215/65R17, since it was part of the tire and wheel option available on the Jeeps. 19 inch wheels were never an option on the Patriot, so its interesting that is in there. I am wondering what other sizes are available to look up the diameter

 

I just want to make sure I'm being clear and not confusing anyone.

I currently have on 215/60R-17 tires and 17 inch wheels on my Latitude. This came from the factory. I am now saying, that after scanning my Patriot, they are saying 225/45R-19 is the biggest tire size.

 

Yea, that is strange. Ironically, 225/45R20 is exactly 28.0", just like the 215/65R17.

225/50R19 is 27.9"
215/55R19 is 28.3"

205/50R20 is 28.1"

 

Yeah, it doesn't really make sense why they told you that is the largest tire size. It sounds like they sent you home with the largest wheel size listed in the programming, which is smaller than your current tire diameter. Wheel size is a bit pointless for that... since I might be able to find a 22 inch rim, and as long as the tire diameter isn't more than 28" my speedometer wouldn't need to be reprogrammed.

If you have all the tire size that can be programmed into your Patriot, you should see 215/65R17. I am wondering what other sizes are available

 

Ahhh!!! That's what happened. There was just a list on the screen, and the list really didn't mention tire diameters. It just showed what was programmable. It went from 16 to 19, and there was two options for each. So yes, 215/65R17 was up there. I saw it under my factory tires.

Well, we now have that cleared up.

So in conclusion, you can take your Patriot to the dealer, and get it programmed to tires up to 215/65R17 in diameter (28 inches). I just wish the list was printable. They tried to print it but there was no option to. You have to program it to the factory options. So if your tire size is off from what's programmable, your ABS, odometer, speedometer, etc will be off. I wish I could remember what tire sizes were listed for 18's.

EDIT:

I think 215/65R-17 was up there. I can't even remember now. Damn man. The 17's had two options, but maybe it was different tire brands. That's what happened with the 19's. It had two options but it was different tire brands. I'm so frustrated right now. I feel like that whole trip was pointless. It looks like I can either go up to 28 inches in diameter, or I have to stick with the tire size I have now or go smaller to fit bigger wheels on. This is crazy.

 

SIGH

I am going to go with the assumption that 215/65R-17 was not on the list. I will probably throw 20's on, and program it using the 225/45R-19 option, since I can find tires for 20's that are 1mm off. This should keep the odometer, speedometer, and everything else correct. SMH, I'm actually going to go down 4mm in tire size.. I wanted bigger tires to close the wheel gap.

EDIT:

Okay my rant is over. I wanted to put 22's on, but now I see that the dealership can only program it to EXACT tire sizes/diameters. I haven't found a tire that close to the 215/65R-17 in diameter. The closest one is off by about 3-4mm. That might be too far for my comfort, so I'm happy now. I will just throw on the 20's, using that 19" tire option. Perfect fit, no issues with the car.

 

The biggest size was 19!!! He said anything over that, and they won't be able to program the abs to work with it correctly,

I wonder if you have big rims, if this excuse could be used by insurance companies to not cover your accident if you are involved in a crash. they would say something like, "well your rims prevented from the abs from working correctly, so we will not cover your accident, because you prevented the car from working correctly" i wonder?

 

That's part of the reason that I want to get the tires to match the EXACT factory tire dimensions available. I don't want insurance screwing me, but it also makes sure that the dealer doesn't void your warranty. Having your odometer (definitely this) and the speedometer off, can result in your warranty being voided.

So far, I have found a 20" tire that is exactly the same radius, diameter, etc as the 225/45R19 tire option. That's a good thing. The bad news is I found a 22" tire that is the same diameter as the 215/65R17 which is making me mad. I want to put 22's on, but I think that's only for FDI and FDII vehicles. I don't think I saw that option up there for my vehicle. I think the two 17's I saw were different factory tire brands. SIGH. I don't want to go have the dealer scan my Patriot again. They did enough for me. I'll just go with the 20's.

 

Lo-pros make for some twitchy steering, you will have to be on top of it ALL the time.
Also, you will have to be the DD forever!

I use to rally Saabs in my hayday, and even with that background we took the Michy MXVs off when they got tired and went with a more touring-like size on our '95 900.

Best of luck with movin' on up.

 

I'll find the link I used to help stay within a decent range of the factory size. I'll post it up in a few minutes..

 

Here it is. Nice little tool. http://www.rimsntires.com/specs.jsp

Pop in your OEM tire size and play with the other sizes to see what and how it compares.

And I'm sold on these in 22's. (Since I can post links now)

 

I know about that website, and that tool. The problem isn't what can fit on the Patriot, it's with the Patriots computer. Basically, the dealership can only reprogram your Patriot to function properly with 4-5 SPECIFIC factory installed tire sizes. These range from 16 to 19, with 215/65R-17 -- ironically -- being the biggest size (diameter wise).

So if you throw on 22" wheels, and a tire that's 27.8" in diameter, the dealership isn't able to reprogram your Patriot to this size. Your odometer and speedometer will be off (and this will likely void your warranty), and your ABS will not function correctly.

This is why I'm actually going to go down in tire diameter by .2", so I can throw on 20" wheels and a tire that fits one of the factory available tire options. This will allow them to keep my odometer, speedometer, etc, accurate. No warranty or vehicle issues.

 

You shouldn't need to reprogram anything if your tires fall within the same diameter as your oem tire. All you're doing is getting rid of sidewall. Everything will be moving at the same speed regardless. A 225/30/22 is only 1mm larger than the oem 16" tire.

 

225/30/22? Is that even a real tire? lol That must have no rubber. I can't find it anywhere. The lowest I've seen is 235 and that throws it off a lot.

 

Heh. I know, it's a pain in the ass. A buddy of mine is the manager of sales here at the local Dunn Tire. I've been talking his (along with multiple other wheel dealers) ear off trying to find what I could do that would NOT void the warranty but still fill in the wheel well nicely. All season or not doesn't really matter to me. I'm in NY so in winter they'll be taken off and the stockers put back on anyway.

 

I feel your pain. 265/35/20 is the the closest 20 inch tire. 27.3" in diameter, but the odometer would be off by almost 50 miles at 10,000 miles. That isn't much but you never know with these dealerships. I'm trying to keep the odometer off by less than 20 miles every 10,000.

Decisions decisions. Do I go with 22's and the rubber bands, or do I throw on 20's with or without the reprogramming?

 

dB-SPL...

I just did some quick research, and I've found that Chrysler/Jeep/Dodge dealers have been voiding warranties based on aftermarket wheels. They try to claim that the wheels/tires have to be to spec (dimensions, weight, etc), or they use it as an excuse to get out of covering any drive train issues. I don't know how true it is, but it looks like the odometer isn't the real issue.

 

Hmm.. Put the stock wheels/tires back on before you take it in?

 

That's what I was thinking but I contacted Jeep again and asked about aftermarket wheels impact on warranty.