Ben I.

I've been using the Challenge Gravel Grinders (marked 38mm width and about true to size) that came stock on my Ridley X-Trail and really like them but planning on going tubeless with my new wheelbuild. Also looking for a little bit smaller tire since I also have some tire rub on the frame on the chainstays (on both of them).

Thanks for getting back to me chas58!

Edit: At least with the Gravel Grinder tires, there was no noticeable difference in tire width between the stock DT Swiss R23 Splines and the new wheels which have Belgium+ rims. I was a little surprised to see that since I've heard wider rims usually mean the tire will get a little wider as well.