Patent ID: 8827061

Claim:
A twin clutch hub, comprising: a hub casing, which is rotatably supported on and around a wheel axle and has an end surface that is recessed to form a socket that receives and retains therein a pawl member; a clutch shaft, which is rotatably fit around and has an end received in and fixed to an inner circumferential surface of the hub casing and an opposite end over which a one-way roller clutch is fit; and a chain wheel seat, which has an end forming a mounting section to which a toothed wheel is mounted, the chain wheel seat having an inner circumferential surface fit over and fixed to the one-way roller clutch in such a way that the toothed wheel is engageable by the pawl member to collectively serve as a ratchet to form a complete ratchet wheel, whereby transmission of bicycle power is achievable in a first manner where returning side tooth backlash is zero and the chain wheel seat transmits the bicycle power through the one-way roller clutch only and transmission of bicycle power is alternatively achievable in a second manner where returning side tooth backlash is zero and the chain wheel seat transmits the bicycle power through the one-way roller clutch and the ratchet wheel.