There is a number stamped on the back of every wedge, usually next to the loft, that almost no recreational golfer has ever consciously checked. The loft is the number on the left. The bounce is the number on the right. The number on the left, fifty-six or sixty or fifty-two, is the one every player can recite. The number on the right, eight or ten or fourteen, is the one that ends up deciding whether the club glides through the turf, digs into it, or skips off the top of it into the back of the ball. It is also, by some distance, the most under-discussed variable in a part of the bag where the strokes-gained gap between a well-fitted wedge and a poorly-fitted one is larger than the gap on almost any other club.
What bounce actually is
Bounce is the angle measured between the leading edge of the wedge and the lowest point of the sole, with the club soled flat on a level surface. A wedge with eight degrees of bounce sits with its sole sloping eight degrees away from the leading edge. A wedge with fourteen degrees sits with the leading edge cocked higher off the ground and the back of the sole making first contact when the club is laid down. The angle is small enough that, looking at a wedge on the bench, the difference between four degrees and twelve degrees is something most players cannot eyeball. The angle is large enough that, at the bottom of the swing, it controls whether the sole skips off the turf in front of the ball or digs into the turf behind it.
The physics of what happens at impact is simple enough. A high-bounce wedge, on a downward strike, presents the trailing edge of the sole to the turf first. The turf compresses, the sole skids forward, and the leading edge gets to the ball with the head still travelling on the kind of shallow arc that produces a clean strike. A low-bounce wedge, on the same downward strike, presents the leading edge to the turf first. The leading edge digs in, the head slows, and the strike becomes the kind of dug-out divot pattern that produces inconsistent contact and either fat or thin numbers depending on the angle of attack.
What the right bounce depends on
The first variable is the player’s angle of attack into the ball. A steep swinger, who hits down on the wedge with a sharp descending blow and takes a deep divot, needs the sole to glide through the impact zone rather than dig. The right bounce for that swing is high, in the ten-to-fourteen-degree range. A shallow swinger, who picks the ball clean off the turf and takes a thin divot or none at all, needs the leading edge to get to the ball without the sole bouncing off the turf in front. The right bounce for that swing is low, in the four-to-eight-degree range. A swing in the middle, which is most amateur swings, sits comfortably in the eight-to-ten-degree range. The wedges that come off the rack at most pro shops are set up for the middle of that distribution, which is the reason most players play a default mid-bounce wedge and do reasonably well from most lies and most conditions.
The second variable is the course. Firm fairways and links-style turf, where the ball sits up on the tight cover and the lies are clean, reward a lower-bounce wedge that lets the leading edge get to the ball without the sole skipping. Soft, lush parkland turf, where the lies are sitting down in the grass and the divot is heavy, rewards a higher-bounce wedge that does not bury itself behind the ball. The third variable is the bunker sand. Powdery, deep, soft sand requires the high-bounce sand wedge that skids through the surface without burying. Wet, packed, firm sand requires the lower-bounce wedge that does not bounce off the sand and into the equator of the ball, which is the recurring pattern of the thinned bunker shot most amateurs produce on a hard British links lie.
The 56 question
The sand wedge, which is the wedge most amateurs use the most, is the one where the bounce choice matters most and is also the one most amateurs never make a deliberate choice on. The default fifty-six off the rack comes with somewhere between ten and twelve degrees of bounce, which is the bounce that suits the average swing on the average course. The player whose course is firmer than average, or whose attack is shallower than average, is the player who plays the default fifty-six and consistently produces the bladed bunker shot and the thin pitch from a tight lie. The cure for both is not a different technique. It is the same wedge with two degrees less bounce, which in most lines is sold as the eight-bounce or the M-grind option in the same loft. The player whose course is softer than average, or whose attack is steeper than average, is the player who plays the default and consistently produces the fat pitch and the buried bunker shot. The cure is two degrees more bounce, which is the twelve or fourteen option.
The sixty-degree lob wedge is the wedge where the bounce choice diverges most sharply by player type. A player with a shallow, sweeping attack on the short pitch shot can play a four-bounce lob wedge happily from any lie that is not in deep rough. A player with a steeper attack, particularly the player who comes down on the ball with hands well ahead of the clubhead, needs at least eight degrees of bounce on the sixty to keep the leading edge from digging in. The lob wedge is also the wedge where grind matters most. A heel-and-toe-relieved grind reduces the effective bounce when the face is opened, which is the move every flop shot requires, and which is why most tour players play a lob wedge with a low headline bounce and a grind that gives them the option of more bounce when the sole sits flat.
The bag composition
The mistake most amateurs make is not the choice of bounce on any one wedge. It is the choice of the same bounce across all three wedges in the bag. A bag with a gap wedge at ten bounce, a sand wedge at ten bounce, and a lob wedge at ten bounce is a bag set up to play one type of shot from one type of lie. A bag with a gap wedge at six, a sand wedge at twelve, and a lob wedge at eight is a bag set up to play different shots from different lies. The shot from the tight fairway lie is the six-bounce gap wedge. The shot from the buried lie in the bunker is the twelve-bounce sand wedge. The shot from the rough on the side of the green, with a half-open face, is the eight-bounce lob wedge with the heel-toe grind. The bag has three shots in it instead of one.
The fitting that produces the right combination is not a long one. A reputable wedge fitter, with a launch monitor and an indoor turf mat that approximates the firmness of the player’s home course, can dial in the bounce profile across three wedges in roughly forty minutes. The cost of the fitting is, in most pro shops, refundable against the wedge purchase. The cost of skipping the fitting and buying off the rack is the cost of replacing a wedge after a season because the pattern of fat and thin from the same lie did not go away. The number on the right of the loft stamp is the number that decides which of those two paths the player ends up on.