A golf club comprising: a golf club head comprising a strike face and a hosel; a shaft adapter secured within the hosel and defining an internal bore; a golf club shaft formed from a fiber reinforced polymer and extending along a longitudinal axis between a tip end and a grip end, the golf club shaft including: a tip end section abutting the tip end, wherein the tip end section is at least partially secured within the internal bore of the shaft adapter; a grip end section abutting the grip end; and a tapered section interconnecting the tip end section and the grip end section, the golf club being characterised in that: the tapered section includes an upper 60% and a lower 60% along the longitudinal axis, the upper 60% abutting the grip end section, and the lower 60% abutting the tip end section, the tapered section further including: a reference portion at least partially located within the upper 60%, wherein the outer surface of the reference portion has a frustoconical shape with a near-constant taper rate; a narrowed portion at least partially located within the lower 60% and between the tip end and the reference portion, wherein the outer surface of the narrowed portion is recessed relative to a reference surface extrapolated from the frustoconical shape toward the tip end. a golf club head comprising a strike face and a hosel; a shaft adapter secured within the hosel and defining an internal bore; a golf club shaft formed from a fiber reinforced polymer and extending along a longitudinal axis between a tip end and a grip end, the golf club shaft including: a tip end section abutting the tip end, wherein the tip end section is at least partially secured within the internal bore of the shaft adapter; a grip end section abutting the grip end; and a tapered section interconnecting the tip end section and the grip end section, the golf club being characterised in that: the tapered section includes an upper 60% and a lower 60% along the longitudinal axis, the upper 60% abutting the grip end section, and the lower 60% abutting the tip end section, the tapered section further including: a reference portion at least partially located within the upper 60%, wherein the outer surface of the reference portion has a frustoconical shape with a near-constant taper rate; a narrowed portion at least partially located within the lower 60% and between the tip end and the reference portion, wherein the outer surface of the narrowed portion is recessed relative to a reference surface extrapolated from the frustoconical shape toward the tip end. a tip end section abutting the tip end, wherein the tip end section is at least partially secured within the internal bore of the shaft adapter; a grip end section abutting the grip end; and a tapered section interconnecting the tip end section and the grip end section, the golf club being characterised in that: the tapered section includes an upper 60% and a lower 60% along the longitudinal axis, the upper 60% abutting the grip end section, and the lower 60% abutting the tip end section, the tapered section further including: a reference portion at least partially located within the upper 60%, wherein the outer surface of the reference portion has a frustoconical shape with a near-constant taper rate; a narrowed portion at least partially located within the lower 60% and between the tip end and the reference portion, wherein the outer surface of the narrowed portion is recessed relative to a reference surface extrapolated from the frustoconical shape toward the tip end. the tapered section includes an upper 60% and a lower 60% along the longitudinal axis, the upper 60% abutting the grip end section, and the lower 60% abutting the tip end section, the tapered section further including: a reference portion at least partially located within the upper 60%, wherein the outer surface of the reference portion has a frustoconical shape with a near-constant taper rate; a narrowed portion at least partially located within the lower 60% and between the tip end and the reference portion, wherein the outer surface of the narrowed portion is recessed relative to a reference surface extrapolated from the frustoconical shape toward the tip end. a reference portion at least partially located within the upper 60%, wherein the outer surface of the reference portion has a frustoconical shape with a near-constant taper rate; a narrowed portion at least partially located within the lower 60% and between the tip end and the reference portion, wherein the outer surface of the narrowed portion is recessed relative to a reference surface extrapolated from the frustoconical shape toward the tip end.