Do you know the numbers for the Michelin LTX M/S?
I don't
for sure know the numbers for the LTX M/S, but all of Michelin's LTX tires are built on the same rolling resistance foundation (the X Radial), with the only difference being tread depth and design. The LTX® A/T2 and the LTX® A/S have the same rolling resistance, so I assume the M/S has the same number.
The Michelin LTX® tires are:
LTX® A/S
LTX® M/S
LTX® M/S2
LTX® A/T2
The LTX® M/S2 is a new one, which is the same as the M/S (Mud-n-Snow), except that it has a slightly different tread design (very similar to the X Radial AT2, except it's designed with a softer rubber compound for cold weather, which is why the lower treadwear rating), has a 70,000 mile warranty in addition to the standard 6-year warranty (covers defects in workmanship and materials for the life of the original usable tread, or for 6 years from date of purchase, whichever occurs first), so it's 70,000 miles or 6 years whichever occurs first. I wouldn't recommend the M/S2's for expediting.
Will the Michelin AT/2 give the 130k life people are getting with the LTX?
Obviously, it can get confusing. The LTX® is the type, and the A/T2 is the model within that type, sort of.
The A/S and M/S tires have a rating of 80,000 miles, and the average lifespan on those are in the 110,000-120,000 range (some will get less, some will get more, some will
report significantly more). The LTX® A/T2 has a treadwear rating of 90,000, so 120,000-130,000 should be very doable if they are kept properly inflated (like with Nitrogen).