Yes, it's August, and I'm getting ready for winter.

Right now I'm looking at Schwalbe Marathon winter studded tire. I notice they come in two sizes in 700c: 35mm and 40mm.

Typically, I'm a fan of squeezing the largest tire I can fit into my frame, in this case I can thread a 40 through my 50mm wide fenders (currently running 38 with no issues). However, there is also the issue of the volume taken up by the tread, and the studs.

So how "true" do those Marathon Winters measure? What size are you running? Would you opt for the biggest size you could clear?

I've also noticed that the 40s are REALLY hard to find. It leads me to believe that they are either really popular, or nearly discontinued.

Thanks for the inputs here in early August!