Joined: Aug 2008
Posts: 13,141
Likes: 2,165
From: Ann Arbor, MI
Bikes: 15 Kinesis Racelight 4S, 76 Motebecane Gran Jubilée, 17 Dedacciai Gladiatore2, 12 Breezer Venturi, 09 Dahon Mariner, 12 Mercier Nano, 95 DeKerf Team SL, 19 Tern Rally, 21 Breezer Doppler Cafe+, 19 T-Lab X3, 91 Serotta CII, 23 3T Strada
Stem weights always include bolts. I cannot think of an exception.
Also, longer does not mean heavier. If you’re talking about the same stem (same construction) then yes, longer must be heavier, but when comparing different stems of various quality, construction technique and material, it is not true that longer must be heavier.
You can also source titanium stem bolts to reduce weight. Pro-Bolt is a good American source online, though I most often get Ti bolts from MCTI out of China on eBay.