Where this data comes from
iFlight's own block for the BOB57 2506 1500KV confirms the 38.2 g this page carried and adds 12N14P, 16x16 M3, 74.88 mOhm, a 5 mm shaft protruding 15 mm, 25.2 V and a 33.26 A / 817.5 W peak. Its Dimension line reads 31.7x19.6 mm where the XING2 2506's block - same 1500KV resistance, same peak current, same max watts, so electrically the same winding - reads 31.7x34.6 mm; the 15 mm difference is that motor's stated shaft protrusion, so the two pages appear to print the dimension with and without the shaft. Both are published as printed