Ok guys and girls,
I’ve read countless posts regarding wheel and tire fitment on here, but I’m still not at a place I can definitely say “It will work fine”.

Scenario:
Looking at the Titan 7 TS-5 wheels in sizes 19x9.5 +32 and 19x10.5 +32

I have a 2017 RCF and I’ve been back and forth for close to a year about lowering it. I’d be all over coilovers if I had some options but with AVS it appears I’m limited. I’ve made the plunge and ordered the Swift springs which I have used on previous cars with no issues so going that route for now. Car will be lowered on the Swifts.

My main question:
Tire sizes. I’d like to run a 275/35 in the front and a 295/35 in the rear. Based on my research these are good sizes for the wheel specs above and won’t give me that stretched tire look. I’m reading folks are running a 30 series sidewall in cases and others are running a 35. It appears the 30 series sidewall is geared more towards the folks running 20” rims.

So, can anybody point me in the right direction here regarding recommended tire sizes to ensure I’m on the right track or if I should be looking at different sizes all together for the above wheel specs.

I appreciate any and all feedback here.

 

According to Mingofish and another member a 20 inch wheel will rub with 275/35. A 19 inch with a 275/35 will clear (from what I've heard). 295/35/19 will probably fit in the rear also, though it may be a more wise decision to go with 295/30/19 instead (just to mitigate the chances of rubbing). Your offsets are also a little low, it seems the common concept here is running wheels below +35mm offsets can cause rubbing. You'd be better off running +40 or +35 offsets all around.

About Swifts, if you live in an area with rough roads, try to avoid rough roads. AVS in the early years hated rough roads (I believe they changed in 2018 with a software update, don't quote me on this though), commonly the 2017's blow shocks if the road is too rough (my hypothesis is it tries to react to rebound too fast, then can't react fast enough which could cause excessive pressure and blow the shock out). I haven't noticed many issues with Swifts giving abnormal issues though, so you should be good to go.

 

Here is what I'm running. During the first few weeks there might be a minor rub or two, only on the inner liner of the front. It will clearance itself out if you are lazy like I was. That at stock height.

Front 19x9.5 +35 265/35/19
Rear 19x10.5 +35 295/35/19

 

The only issue with running a 35 series front tire larger than 255 is that it will generally have rubbing issues when under fair amounts of compression (fast downhill corner, speedbump, pothole etc). Anything larger than 255 should be a 30 series. For instance, Pete/Red Devil runs 295/30/19 with +35 last time I saw, he's running on a modest drop and from what I remember he only experiences minor rubbing under extreme compression (this would probably go away if the offsets were +40 or +45). But, Mingofish had rubbing on a 275/35/19 with +35 offsets.

 

I've loaded the trunk up with enough groceries to drop the car 3/4" an had no issues with the 295/35/19 in the rear. The 265 in the front are right on the edge, after a week I never had any issues with rub but it was there. For me the marginal grip added was necessary as I push the car very hard from time to time. I do agree with you +40 or +45 would be much better.