Originally Posted by
Rides4Beer
28mm GP5Ks will measure out to 30mm on a set of AR46's and ride/handle great. I'm trying out a set of 32mm GP5Ks today (different wheelset tho), haven't measured them yet, but they look to be a good bit bigger, taller especially. Ride should be great, I'm interested to see if there's any difference in speed.
Given that you have no clearance issues on the Grail, I would go wide.
Originally Posted by
WhyFi
You're getting in to the weeds.
Most here are going with as wide as they can, factoring in current and near-future bikes. Why wouldn't *I* go with an R45? Because any bike that I have (or would consider buying) will clear an AR46. Why wouldn't I get WR45s? Because one of my current bikes can't clear 32mm and because I'm fine limiting myself to the comfort/pressures of 28mm tires on future bikes.
Yeah with disc brakes I would skip straight to the WR50 ($$) or WR45 ($) and put 28-32mm tires on it. Since you have a grail, I assume you’re not doing elite races on it. So there’s very limited benefit to going with narrower tires for you. Don’t feel pressured to go with narrow stuff like UCI racers. A lot of amateur racers in CA are moving to 28s these days.