I bought a nice mountain recently, a Niner Jet 9 RDO. On Niner’s website, the weight for my build is listed as 28.8 lbs. It does say “approximate weight” but anyways.
The bike comes stock with 2,000g wheels & 2,000g tires, plus a basic alloy stem/handlebar. I switched these out for carbon wheels that are 1 lbs lighter, tires that are 0.5 lbs lighter, and cockpit that is another 0.5 lbs lighter. I put the bike on the scale, thinking it should read around 26.8 lbs, but instead it said 28 lbs…
I had a similar experience with two other high end mountain bikes (a Santa Cruz and a Yeti). I have also seen several high end carbon road bikes that come through our shop weighing significantly more than claimed.
To be clear, I don’t really care about weight that much. What I do care about is that manufacturers seem to be lying to us consumers and getting away with it. Well, actually I don’t care that much about that either but just venting