@shamilt1 chiming in with my experience. I’ve written this in another thread but I’ve compared the Race 2 to Garmin 970, Fenix 8, COROS Pace Pro, Pace 4, Apex 4, Suunto Race and Race S, AND a measuring wheel. Many many data points. I also recently picked up the Suunto Vertical 2. All devices including the measuring wheel compare favourably, EXCEPT the Race 2, which measures short by 0.5 to 1.5 % every single time. Given all of these devices have been compared against a measuring wheel, I would say the Race 2 does indeed show shorter distance at the end of runs, with the other devices all being quite true to real distances.