^^^ actually if you look close that size is only an R and not ZR (unlike the 275's). And yes, back ordered everywhere. Maybe the next set for me

 

You might need glasses, this is straight from the Michelin website.

29422 285/35ZR19/XL 103 (Y) $438

 

Put PSS on rear Friday, and just finished a 90 mile drive to our fav restaurant at in the country with many undulating and curvy roads there and back. Big difference from the Bridgestones. In fairness, there was little life left on them, but the biggest difference was the ride! Would recommend

 

D'oh! Was looking at the 18's by mistake.

In the end I did put PS2's on the rear (stock Bridgie's on the front with plenty of tread left). Had the car at the track this week and it handled very well. I was not able to discern any issues with the mix of rubber. I had very predictable throttle steering available to help deal with the usual understeer you get with the car on tight corners (traction control was on throughout the day). I had a blast .

 

What does the "/XL" mean as part of the Michelin tire designation. This only appears on a few of their models.

 

Load Range/Ply Rating Identification

The load range or ply rating branded on a tire's sidewall helps identify how much load the tire is designed to carry at its industry specified pressure. Passenger tires feature named load ranges while light truck tires use load ranges that ascend in alphabetical order (letters further along in the alphabet identify stronger tires that can withstand higher inflation pressures and carry heavier loads). Before load ranges were adopted, ply ratings and/or the actual number of carcass plies were used to identify the relative strength with higher numeric ratings or plies identifying tires featuring stronger, heavier duty constructions.

Today's load range/ply ratings do not count the actual number of body ply layers used to make up the tire's internal structure, but indicate an equivalent strength compared to early bias ply tires. Most radial passenger tires have one or two body plies, and light truck tires, even those with heavy-duty ratings (10-, 12- or 14-ply rated), actually have only two or three fabric plies, or one steel body ply.

In all cases, when changing tire sizes or converting from one type of size to another, it is important to confirm that the Load Index in the tire's Service Description of the new tire is equal to or greater than the Load Index of the original tire and/or that the new tire’s rated load capacity is sufficient to carry the vehicle's Gross Axle Weight Ratings.

Passenger Tires

Since most P-Metric passenger tires are manufactured in the Standard Load Ranges, they will have nothing branded on their sidewalls or may be branded Standard Load and identified by an SL in their descriptions, as in P235/75R-15 SL.

Extra Load P-Metric tires will be branded Extra Load, and identified by an XL in their descriptions, as in P235/75R-15 XL.

Light Load P-Metric tires will be branded Light Load, and identified by an LL in their descriptions, as in P285/35R-19 LL.

NOTE: Only P-Metric sized tires with 45-series aspect ratios or lower may be manufactured in a Light Load configuration. Light Load tires are designed to carry less weight than Standard Load tires and have been developed for specific applications (typically when relatively large tire sizes are used as Original Equipment (O.E.) on relatively small cars or for Track & Competition DOT tires used for racing applications).

P-Metric Passenger Vehicle Tires
Load Ranges Abbreviated Max Load Pressure
Light Load LL 35 psi (240 kPa)*
Standard Load Nothing or SL 35 psi (240 kPa)*
Extra Load XL 41 psi (280 kPa)*

*In an effort to internationally harmonize load ratings and ranges, recently introduced and future LL, SL and XL P-Metric sizes will use ISO/Euro-metric maximum load pressures of 36 or 42 psi
Standard Euro-Metric tires will have nothing branded on their sidewalls, while Extra Load/Reinforced Euro-Metric tires will be branded as such and identified by an XL or RF in their descriptions, as in 305/50R20 XL or 305/50R20 RF