Lexus ISF / IS-F / LFA / LF-A  Forum banner
1 - 4 of 4 Posts

· Registered
Joined
·
38 Posts
I disagree, as I have in the past with your recommendation. I am running the 285/30/19 Continental DW on the back, and the tire puts down a contact patch that covers the full width of the tread. (see picts attached). There is no tire bulge and the handling is greatly improved over the stock PS2s. IMO, the 275/30/19 is too short vs the stock 255/35 tire. A 295/30 would be the correct tire OD, but IMO, would be too wide for the stock wheel. As I explained to you before, I had my tires installed by a Discount Tire store, and all this was discussed with store management, and they agree with me. I know the tire makers don't recommend this installation, but take it from someone with experience, it works and there is no downside.

Lou
This is probably a stupid question, but are the 2011 stock wheels the same sizes as the previous ISF's ('08-'10) wheels? Also, would your experience with the Conti's in the 285 width tires in the rear vs. the stock tire 255 width (ie. improved performance) be directly applicable to the PSS's... or since they are different tires (but come in the same size) would they fit and or possibly have worse performance than the smaller 275 tire recommended by the direct tire rep? As always.. .TIA!! ;) (I'm seriously considering getting of rid of my Potenzas that only have 3500 miles on them for the PSS's and if I'm understanding all the posts right, it seems that wider is generally better for performance (to a point obviously). LOL (you also say there is "no downside", but is there any theoretical or possibly observable downside to going with the 285 and 255 combo compared to the stock sizes??? I'm sorry for my newbie questions.....
 

· Registered
Joined
·
38 Posts

· Registered
Joined
·
38 Posts
For some unknown reason, Michelin does not make a performance non-runflat tire (none, nada) in the 285/30/19 size. I don't understand it:confused: And yes, I have found absolutely no downside with the 245/285 combo.

Some of our members have had good luck running the 245/275 combo. But, IMHO, the 275/30/19 is just a wee bit small in OD, but, that's just me. Again, IMHO, using a 255/35/19 on the front would be pushing it. It probably will work, but from my research, which was mostly just visual, I wouldn't do it.

Lou
I got confused when Grandpap said he was running 285's on the rear, as I thought he was referring to PSS's. When you say the 275/30/19 is "too small in OD", what would this affect? (would this small amount affect speedo accuracy much? what about performance?) I'm so confused right now as which PSS's would be best for my stock wheels. Should I just go with OEM sizing or is there a "wider" PSS that would fit and be better performance than that?
 

· Registered
Joined
·
38 Posts
Having the 245/35 and 275/30 PSS installed on the factory wheels by America's Tire and Newport Lexus installed brake pads & turned the rotors @ 25k miles. Looking forward to trying it all out!
I'm looking foward to hearing your experience with them and the sizes.
 
1 - 4 of 4 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top