^ That's actually very good memory
- the LM series are "Performance Winters," so in deeper snow/slush and on ice, they will be more compromised than otherwise "more aggressively winter" tires.
It's both a function of their tread design (much of which is where you'll gain snow/slush performance), tread depth (the lower starting tread-depths of the "Performance Winter" genres lends to them slightly more sure-footing at highway speeds, as does their compounding and other "unseens"), as well as their "unseen" aspects such as carcass internals and compounding.
The Bridgestone Blizzak LM-series tires, like other "Performance Winters," are designed to perform almost like all-season tires in the clear, while giving the driver a larger safety (or fun) margin when wintry precip starts to hit the ground. They are, as any other tire, a compromise, and where they compromise is in the deeper and/or slipperier wintry stuff (i.e. deep powder and ice, respectively) when framed against the "Studless Ice & Snows," as well as in terms of clear-weather handling, both wet and dry, in terms of "All Season" tires. [ Note Bridgestone's attempt to fill in the void a little more, with the LM60, which utilizes, visibly, the WS-series (Bridgestone's designation for "Studless Ice & Snow" tires) tread-pattern, while maintaining the performance orientation (i.e. higher speed-rating: note that the WS-series, with use of their proprietary top-layer, cannot attain higher speed ratings) of the rest of the LM lineup.... As-expected, it trades off a bit of highway stability and clear-weather performance for better snow capabilities.
A dedicated "deep winter" set, which you'll only use in true winter conditions (i.e. maybe save them for December through mid-February?), given that you're in MD, plus a set of good all-seasons that will not be unsafe, if "caught-out" in an unseasonal storm, is what I think would be ideal (and what I use) for my wife, too. Unless you and/or your wife can see the fun-factor of a dedicated set of "summer" tires, the winter/all-season combo will give you more of a safety buffer, during those transitional months.
If you haven't purchased winter tires before, cross my screen-name here as well as on LegacyGT.com with the terms "winter tires" - there's quite a few threads in which I've participated, along with many other winter tire enthusiasts, particularly over at LGT.com, that should help guide your decision-making process. Also, Luke's "Official Winter Tire Thread" over at NASIOC (where my screen name is LGT+WRX
) has a great introductory OP read on page 1, and some in-depth discussions, too.
Remember, the first and most fundamental decision you have to come to is where your needs and wants fall in the overall spectrum of things - and will you best benefit from:
- "winter capable" all-seasons
- "Performance Winters"
- "Studless Ice & Snows"
- studded winter tires.
Each of these 4 categories (3 sub-genres of "winter tires," along with that AS alternative) will demand specific compromises and have specific strengths - and it is to these weaknesses and strengths that you need to match your unique and specific desires.
Once you've made that initial choice, the one of sub-genre, the rest simply becomes debating which specific tire to buy in that sub-genre, and that can be anything from fitment to pricing, and that will be much easier.