my winter commuter is an old mtb with mtb tires on it. It has a 12-25 cassette on it, but the front shifter has been dodgey the last few years, but just havent been bothered fiddling with it, as I just stay in the mid ring all the time and tend to ride slower anyway on snow and whatnot.

The connection to the topic is that on the downhills I hit on my commute, Im in the 32/12, or only 70 gear inches, and I spin it regularly up to my max, which is I dunno, 110-120. The bike computer stopped working a few years ago also, so I dont know how fast I get up to, probably 35k or so, but I do realize that I guess I am not particularly bothered by the 175s, as I can happily spin them pretty well and it doesnt feel overly weird or anything.