Patent ID: 8100795

Claim:
A riveted sprocket assembly for a bicycle comprising: a sprocket carrier having a plurality of carrier arms and a plurality of rivet holes therein; a plurality of sprockets, the sprocket carrier discrete from each of the sprockets; and a plurality of rivets for attaching the sprockets to the sprocket carrier arms, the carrier arms having front faces and rear faces disposed opposite the front faces, the front faces abutting the sprockets and having radially arranged steps of decreasing axial thickness in the radially outward direction, the rear faces having substantially flat profiles and being substantially coplanar with each other, the carrier arms having a narrower circumferential width at a rivet hole in a central region than a circumferential width at a rivet hole at an end region, the central region disposed radially inwardly of the end region of the carrier arms and wherein the width of each carrier arm tapers from the end region to the central region, wherein the width of the carrier arms that tapers forms a majority of the length of each of the carrier arms.