Patent ID: 8157198

Claim:
A tape reel comprising: a hub on which a recording tape is wound; and flanges provided at both end portions of the hub, wherein the hub has a single large diameter portion whose diameter is larger than diameters of both widthwise direction (axial direction) end portion sides, diameters are decreased monotonously from the single large diameter portion toward the both widthwise direction respectively and the large diameter portion is offset, from a widthwise direction central portion of the hub, toward one flange side or another flange side, wherein radii of said both end portions of the hub are different from each other, a width of the recording tape is substantially 12.65 mm, and a difference between a larger radius among said radii of said both end portions of the hub and a radius of the large diameter portion is greater than or equal to 0.067 mm and less than or equal to 0.08 mm.