What is a Rigger in Rowing?

Definition

A rigger is the triangulated metal frame bolted along the gunwale and stretcher area of a rowing shell. It carries the pin (the oar's pivot) 70 to 90cm clear of the hull, depending on the boat's rigging dimensions. That distance is the whole point: a long outboard moment arm against a fixed pin is what turns the rower's pull into boat speed. Without it the oar has nothing to lever against, and no useful force reaches the water.

Around any boatshed in NZ the word "rigger" gets shortened to "rig" without anyone losing track ("the bow-side rig is bent", "check the rig on seat three before you launch"). The verbs follow the noun: "to rig" is to bolt the assembly on, "to derig" is to take it off. Every racing shell is derigged before going on a trailer, because the projecting arms would otherwise foul the stacking straps and leave the boats sliding on each other through every roundabout between Karapiro and Twizel.

Rigger anatomy

Four parts make up the assembly. Each is adjustable, each is replaceable:

• Pin: the upright stainless steel post fixed to the rigger arm. The swivel rotates on it. Pins are polished where the swivel rides, and they carry the screw or shim adjustments that set pitch in both planes - stern lean fore and aft, lateral lean toward or away from the rower.
• Swivel (oarlock): the U-shaped plastic block that the oar shaft sits inside. It turns around the pin and closes with a hinged top gate over the shaft to hold the oar in place. Whatever the rower does with the handle, the swivel is the part that translates the motion into useful work against the pin.
• Sleeve: the plastic collar bonded around the oar shaft that rides against the inside face of the swivel. Sleeves belong to the oar rather than the rigger, but the diameter has to match the swivel. The common patterns in Kiwi boatsheds are Concept2 Macon, Concept2 Smoothie and Croker.
• Button: the adjustable plastic stop clamped around the oar shaft. It sits against the inboard face of the swivel and prevents the oar sliding outboard during the drive. Sliding the button changes the inboard length, which silently reshapes the lever arm and is therefore a rigging change disguised as a small clamp adjustment.

Rigger materials

Aluminium runs most NZ club fleets because it tolerates a damp boatshed climate, bends under impact rather than shattering, and bends back true with a vice and a soft mallet. Anodising is worth the extra cost for clubs on tidal salt water (the Waitemata, Lyttelton, Otago Harbour) where bare alloy pits inside a season. The honest engineering trade is right there: aluminium is repairable, carbon is not. A cracked carbon arm is a replacement decision; a bent aluminium arm is a Sunday-morning job at the workshop bench.

Carbon fibre riggers come into play on top-end racing shells and elite scullers' boats. The weight saving is noticeable rather than marginal, and on a single scull it shows up in how the boat sits between strokes. The major builders represented in Kiwi boatsheds - Sykes (Australian, the dominant fleet brand here), Wintech, Hudson, Empacher and Filippi - tend to run aluminium arms on their sweep range and switch to carbon on the elite sculling singles and doubles where weight and stiffness both matter and budgets allow.

Rigging adjustments

Four parameters drive everything the rower feels in the lock. The rigging tech or coach sets them; the rower's job is to notice when they have drifted:

• Height: measured from the lowest point of the seat to the lowest point of the swivel sill. Too low, the handles bash the gunwale at the finish. Too high, the catch goes long and weak. Working ranges are roughly 16 to 18cm for sweep and 14 to 16cm for sculling.
• Span (sculling) / Spread (sweep): pin to pin across the boat for sculling; pin to the boat's centreline for sweep. This is the lever-arm control. Standard sweep spread sits near 84 to 86cm; standard sculling span sits near 158 to 160cm.
• Pitch: the angle the pin sits at. Stern pitch (the lean of the pin top toward the stern) is typically 4 to 6 degrees and drives how the blade enters and extracts. Lateral pitch (the lean toward or away from the rower) is held tight, usually 0 to 1 degree. Wrong stern pitch makes the blade dive on catch or wash out before the finish.
• Pin work / Foot stretcher position: the fore and aft placement of the pin and the matching stretcher position fix where the rower sits at catch and finish. Sliding the stretcher toward the bow buys more leg compression at front stop; sliding it sternward shortens the slide and brings the finish closer.

These four interact constantly. Open the span and the effective height changes. Shift pitch and the blade-water entry alters. For that reason most Kiwi clubs keep a rigging book or shed log per boat with the current numbers written down. When an experiment fails, having the previous setup recorded means the boat can be returned to a known good state in minutes rather than guessed at over a weekend.

Rigger maintenance

The maintenance side of the sport gets no glory and matters more than rowers admit. A grease cycle on the pins every couple of months keeps the swivel turning freely (dry pins squeal and grind a flat onto the swivel inner). A spanner check over the rigger bolts before each outing is non-negotiable: a single bolt working loose lets the rigger flex under load, and the flex turns into a bend or a torn-out fitting faster than any coach expects. Half the "blade is doing something weird" callouts a coach fields trace back to a loose pin bolt and could have been fixed in two minutes at the rack.

Swivels and sleeves are wear parts. When the swivel inner shows grooves or the oar rattles in the lock, replace rather than nurse along. The role of fleet rigging tech almost always lands on one experienced member who knows what every boat ought to feel like. Boat maintenance tracking in the admin dashboard gives that person somewhere to record what was done per boat (pin regreased, swivel swapped, button reseated) so the history stays in one place rather than fragmenting across the club's WhatsApp threads.

Common rigging-related issues

A lot of "technique" problems that appear out of nowhere are rigging in disguise. Worth ruling out before reaching for a video session:

• Oar slipping in the swivel: a drifted button or a grooved sleeve. Tighten or replace before the next outing - a slip under load risks an injury and at best ruins the piece.
• Blade angling off at the catch: the pin has shifted in pitch, almost always because a pin bolt has worked loose. Five minutes on the bank with a pitch metre finds it. Five minutes with a screwdriver fixes it.
• Crew rolling to one side: spread or span is not even across the boat, often the legacy of a hard knock that bent a rigger that nobody got around to straightening. Measure both sides on the rack. Anything beyond 1cm of asymmetry is a tech-bench job, not an on-water one.