pinero61
Well-Known Member
What made you decide to go with the 40 sidewall?
I am looking to do a 285/40 19 square setup on 10 inch MRR FS01's (the MRR's fit). The OEM front diameter is 27.1 inch and rear is 27.7. If I went square with the 40 sidewall on 285, the diameter of the front and rear now becomes 28 inches.
I prefer this option the most as it
1) keeps a nice amount of sidewall for DD'ing (instead of a 20 inch rim). 20 inch rims really ruin ride.
2) the tread width is large (especially with the PSS, MUCH larger than the 35 series tire in the 285 size!)
3) weight of the rim and fatter tire is still less than the 20 inch rim and 35 series tire
4) and when I lower the car, this will reduce half of the lowering in the front (I need the ground clearance) as most staggered kits do 1 inch in the front at least. (ex: FRPP track springs or BMR handling ones)
5) There is also a good selection of tires in this size. I can use Michelin PSS OR Michelin AS3's (my preference due to weather here). Unlikely to be discontinued as its not an especially rare size.
Handling might be slightly softer over the OEM with the larger sidewall and I'm not sure if this will look good and clear the front wheel wells (it should).
Other options I considered but didnt go for:
- 285 square with 35 sidewall. Diameter now goes down to 26.9 inches, which is a almost an inch drop in the rear and .2 inch drop in the front over OEM. This essentially kills my ability to go for stiffer lowering springs down the line. The pros are the tires weigh 2 pounds less a piece.
- 285 front and 305 rears, 35 sidewall. Choice is REALLY limited on tires for the rear. I think only Michelin PSS.
- 285 front and 305 rears, 40 sidewall. Tire rack has no options for the rear. I see you have the Nitto, which wont work for me.
- 285 front and 315 rear, 35 sidewall. Too much under steer risk in this configuration. Hardly any tire options.
Mainly because it fills the well, and it was the better of the two options offered. However, once these wear, I'll be going with INVO's in 285/40 and 325/35. I like the NT05, but it was not the tire I wanted. Unfortunately, for the profile we need to fill the well, not much is offered in 19"
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