A golf club head includes a striking face, and a body coupled to the striking face. The body includes a crown, a sole disposed in generally opposed relation to the crown, and a back extending away from the striking face. The striking face and body collectively define a hollow interior chamber. A weight is disposed entirely within the interior chamber. An adjustment mechanism is coupled to the body and the weight to enable external adjustment of the weight along three axes.

A golf club head includes a head main body, and a toe-side component. The head main body includes a striking face, a hosel portion defining a shaft center line, and a mounting portion for mounting the toe-side component on a toe side with respect to the shaft center line. The toe-side component is fixed to the mounting portion removably. When the toe-side component is removed from the mounting portion of the head main body, a head projected area in a front view of the golf club head becomes smaller.

A golf club head includes a head main body, and a toe-side component. The head main body includes a striking face, a hosel portion defining a shaft center line, and a mounting portion for mounting the toe-side component on a toe side with respect to the shaft center line. The toe-side component is fixed to the mounting portion removably. When the toe-side component is removed from the mounting portion of the head main body, a head projected area in a front view of the golf club head becomes smaller.

A method and an apparatus for playing golf on a hard surface comprises a replaceable striking pad attached to a conventional golf club head by means of at least one attachment means, a spiked ball, a portable ball trap to trap the spiked ball and an optional remotely controlled vehicle to position the portable ball trap. The replaceable striking pad includes a small lip at a bottom end on a front face and a holding ledge having substantially curved edges extending away from the bottom end of the front face. The holding ledge is adaptable to wrap around a bottom sole of the golf club head. The portable ball trap includes a thin flat platform with tapered edges, a central threaded pole positioned on the thin flat platform and a circular frame having a plurality of hinged tabs threaded to the central threaded pole.

A method and an apparatus for playing golf on a hard surface comprises a replaceable striking pad attached to a conventional golf club head by means of at least one attachment means, a spiked ball, a portable ball trap to trap the spiked ball and an optional remotely controlled vehicle to position the portable ball trap. The replaceable striking pad includes a small lip at a bottom end on a front face and a holding ledge having substantially curved edges extending away from the bottom end of the front face. The holding ledge is adaptable to wrap around a bottom sole of the golf club head. The portable ball trap includes a thin flat platform with tapered edges, a central threaded pole positioned on the thin flat platform and a circular frame having a plurality of hinged tabs threaded to the central threaded pole.

A golf club head includes a striking face including a face center, a top portion, a sole including a leading edge and a trailing edge, and a rear side opposite the striking face. The rear side includes a channel configured to permit bending at least a portion of the sole to cause plastic deformation to change a bounce angle defined as an angle between a virtual sole line and a virtual ground plane when the golf club head is orientated in a reference position where the golf club head is addressed to hit a golf ball.

A golf club head includes a striking face including a face center, a top portion, a sole including a leading edge and a trailing edge, and a rear side opposite the striking face. The rear side includes a channel configured to permit bending at least a portion of the sole to cause plastic deformation to change a bounce angle defined as an angle between a virtual sole line and a virtual ground plane when the golf club head is orientated in a reference position where the golf club head is addressed to hit a golf ball.

A golf club head having a hollow structure includes a face, a sole, and a crown. The face includes a front surface and a back surface that face away from each other. The front surface is a ball-striking surface. The sole includes an abutment structure. The abutment structure includes a metallic sole fixation member fixed to the sole, an elastic member, and a metallic pin member connected to the metallic sole fixation member through the elastic member.

Disclosed herein is a driver-type golf club head that has a strike face. The strike face has a central region, defined by a 40 mm by 20 mm rectangular area centered on a geometric center of the strike face and elongated in a heel-to-toe direction. The driver-type golf club head is configured such that after 500 impacts of a standard golf ball at the geometric center of the strike face, where at each impact the standard golf ball has a velocity of 52 meters per second, the CT of the strike face at any point within the central region is less than 256 microseconds and the CT at the geometric center of the strike face is no more than five microseconds different than the initial CT value.

A golf club head with an adjustable weight assembly that includes a pair of stacked, rotatable circular plates with through-slots and a slidable weight that can move within the slots and clamp the plates together so that they are reversibly fixed to a body portion is disclosed herein. The plates are preferably composed of a lightweight material such as composite, and are located on the sole so that the weight assembly is visible to a user. The plate and slidable weight combination and allows for an increased range of personal performance customization by way of adjustability and interchangeability without using up available discretionary mass in the golf club head.