22-inch wheel/tire question

[gittyup]

As a FX45 newbee, I could really use some advice.

I recently purchased a 2003 FX45 with chromed OEM wheels and 265/50R20 tires and I'm thinking of upgrading to some 22" wheels/tires and I'm hoping to have all my ducks in a row before taking the plunge.

______________________ New 20" wheel attributes ___ Old 22" wheel attributes
______________________ --------------------------- ___ ----------------------------
Size: _____________________________ 22" x 8.5" ________________ 20" x 8"
Offset: _____________________________ +20mm ___________________ +40mm
Hub bore: ____________________________ 83mm __________________ 66.1mm
Bolt pattern: ________________________ 5x114.3" _______________ 5x114.3"
Back spacing: __________________________ 5.54" ________________ ??????


_________________________ Old tire attributes ______ New tire attributes _______ Difference
_________________________ -------------------- ______ --------------------- ______ ------------
Size: __________________________ 265/50R20 ____________ 265/35R22
Diameter ___________________________ 30.43" ________________ 29.3" __________ -1.13"
Width _____________________________ 10.43" ________________ 10.43" _____________ 0"
Circumference ______________________ 95.61" ________________ 92.06" __________ -3.55"
Sidewall height _______________________ 5.22" _________________ 3.65" __________ -1.56"
Revolutions per mile __________________ 662.7 ________________ 688.26 __________ 25.55
Speed difference at _____________________ 65mph ______________ 62.59mph _______ -2.41mph

My concerns are:

1. A) Do I need a hub centric ring or spacer?
B) Any suggestions on brand or type?
C) At this hub bore size difference am I asking for trouble?

2. If I purchase new TPMS' from ebay that claim to be compatible with my FX45, are these fairly universal?
Or do I need to be more discriminating with my choice of TPMS?

3. Is it correct to assume this offset difference is the equivalent of adding a 20mm wheel spacer?

4. With this 20mm offset difference together with the tire size differences and the wheel well seem generously oversized,
A) Am I at risk of making contact or damaging the wheel wells on tight turns?
B) Am I at risk of making contact with the outer wheel well edges when encountering serious road bumps or holes?
C) What if I have several passengers and 4 luggage bags in the rear?

5. Am I overlooking anything and do you think I'll run into any issues and if so, do you have alternative suggestions?

6. Will the disc brake calipers and everything else behind the wheel clear without issue?

7. The FX already has a pretty firm ride already. Am I asking for some serious discomfort and/or potentially prematurely wearing misc. suspension parts with the lower profile tires?

Thanks for your help,

 

[Dremersvision]

I will answer a couple of the questions based on previous vehicles i have had.

4)-B

i doubt you encounter any rubbing even with passengers in the car. I did not read anywhere in your post that you were lowered. If you were lowered than you would probably come across that issue.

4)-C

Again, due to you riding on stock height/suspension. your car will drop some due to weight but you will not see a 2"+ drop.

6) Your calipers should clear unless you are running big brakes or running very low offset on the wheels you are getting which i don't think you are.

7) I personally do not think that the fx has that firm of a ride but to answer your question......Yes you will put wear on certain items...Think ball joints, wheel bearing, tranny etc. I don't think you will put enough wear on those things to be scared but you are putting something on the vehicle that was not originally there. Huge difference hitting a pot hole on a 60 series tire vs a rubber band 30 series.


I am not a guru by any means but i have had a ton of modded cars. will wait for someone else to chime in.

 

[gittyup]

Thanks, Dremer. I bought the FX45 used about 6 weeks ago and appears to be pure stock so it's possible the previous owner did something somewhere but I've not seen evidence of it.

I've been out of things car-related for a while and of course every vehicle is different and responds differently to mods to some degree.

From what I can tell visually, the OEM tires/wheels would just barely clear the wheel well lips/edges if encountering a serious bump or object in the road.

I'd love to extend the tires/wheels out an inch or so but I have no idea what normal spring travel distance is when encountering road anomalies.

However, my big concern is when I pack my small family of 3 in the car including luggage for a road trip this summer and I can't avoid an object or hole in the road. That's the situation I try to keep in mind with an aftermarket wheel/tire package as it could be rather expensive and embarrassing.

Thanks for your response.