Before i go and make an accidental tire purchase, i thought i'd see if can get some assurance from Slowtwitch. I bought a pair of older Zipp 404 Firecrest clinchers and trying to figure out what tires to buy. I was told 25mm will work best.

I see GP 5000 on Amazon, but oddly enough the clinchers only show sizes in 700 x 32mm (and lots in 650c). When i choose 'Mountain bike; sport' instead of Clincher, i get 700 x 25mm. Any idea what Moutnain bike;sport means? is this not Clincher?

Any other recommendations? I'm looking for something mid-level in terms of price.

Thanks!