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Edgingage posted a topic in Wheels & TiresHello folks: A few years ago, Tirerack had a feature where you could see how different tire sizes look in your vehicle, from a side view. You could see if the overall size was smaller or larger than the OEM tires, for comparison. That feature kind of gave us an idea of the proportion/ratio of the tire size in the wheel well. I seem to remember that it even told us the maximum tire diameter you can put on a particular vehicle, with more other details (but I'm not certain on the latter). I wonder if any of you could suggest/recommend a website with similar feature nowadays. Basically, my 2011 Edge takes 245/60R18 OEMs, but I would like to know if I can change to a wider contact patch keeping the same wall ratio and rim diameter. For example, from stock 245/60R18 to 255/60R18 or 265/60R18 or 275/60R18 or 285/60R18 or 295/60R18, but still keeping the same wall ratio and rim diameter SAFELY, or if as I increase the contact patch width I'll have to also decrease the side wall ratio. i.e., from 245/60 to 255/55, and so on (the wider contact patch/the smaller wall ratio). If I have to decrease the sidewall ratio as I increase the contact patch width, how would the wheels will look like in the well? Will they fill the same overall wheel diameter or the whole wheel diameter will look slightly smaller as I decrease sidewall ratio when increasing contact patch width?. i don't mind to go to a little bigger in total wheel diameter IF it's still 100% SAFE to do so, but I wouldn't want to go to an overall smaller wheel diameter if I don't have to. In summary: 1.- What's the widest tire I could go with still SAFELY on 18" OEM rims for a 2011 Edge SEL (Front WD)? 2.- How the overall diameter will end up looking if I also have to decrease the sidewall ratio to be able to go the widest on the contact patch? I think we also need to take into account the rim width. My understanding is that OEM rims are 18"x8" for 2011 Edge SEL. 2.- Any website where I can see how the patch width & wall ratio changes would look like for comparison? Any comments, suggestions and/or references are greatly appreciated in advance.