I spent alot of time trying figure out something about the Metzler 888, but since it was so new it was tough.
Sent an email to revzilla and thought I would get a simple couple of lines or canned response back. I described the weight we carried on the bike and type of riding I normally do.
Liam Irving from revzilla sent me a full page reply!! He looked at the weights involved and took my various riding styles into account. I ended up ordering the Commnader 2s
Here is what he sent me:
Tire time! What fun. Nothing brings back bike performance like new shoes! First, I'd like to congratulate you on being cognizant of your loaded weight - if only all our customers were so savvy!
Now, I believe your Glide's GVWR is 1360 pounds. Less the weight of the bike, which I think is 783 pounds, leaves you 577 lbs. to carry rider, pillion, and gear. Removing your combined weights, you have 127 pounds of carrying capacity left. Assuming some weight for your gear (Helmets, jackets, pants, maybe a rain suit tucked in the bags), and items on your person, I would imagine that with any overnighting/camping provisions that you are running very close to max load. I think that's important with respect to the tire. Bias-plies have higher load carrying capacity - HD put them on there for a reason! They also are recommending a 65H load/speed rating for the front, and an 81/H load speed rating for the rear.
Now, given the fact that you said you're tossing this bike into the corners, I am going to presume grip is a little more important to you than tire life. Given the weight of bike and style of riding you're doing, I am going to assume you know that your conditions are less-than-optimal for tire life!
The Commander II is going to be the sportier of the two you've picked. It is hands-down the one I think you should run with. The Triple 8 is not my top choice for two reasons: First, it evolved from the Marathon, a great tire for touring, but one that offers less-than-stellar grip. The second reason is part of the first: It's a brand-new tire. I can't tell you how it performs - I haven't ridden one at all, and the folks that have have not ridden it long at all!
The other option I see for you is a Pirelli Night Dragon. It is the other sporty 'bagger' tire. Between the two, I am a Michelin man through and through, but I certainly wouldn't sniff at a bike equipped with Night Dragons. I would imagine the Michelin will offer a little more wear - they typically wear very well. Either tire would be a fine choice, but I would probably steer clear of the Metzeler, were I you.
I hope that helps some!
Fuel Moto header (no cat) Jackpot 2 1/2 mufflers, PV by Fuel Moto, BAL1, Woods 222 cam