GRS1: Sliding Rigger

Rowing with Riggers:

Traditional rowers have long utilized a fixed seat and fixed oars. Sometime ago, the mechanical advantage of a sliding seat became known, followed by a fixed seat in concert with a sliding rigger.

Both sliding systems allow for the use of the full potential of the human rower, leading to a more efficient, full-body rowing experience.

The Gryffyn GRS1 is an advanced new sliding rigger system with distinct advantages over many other similar systems, designed for maximum efficiency, ease of use and convenient transport/storage!

The oars can be stowed while you are underway so that your hands are free for camera, binoculars, clothing, snacks, fishing, etc.

The GSR1 Sliding Rigger:

The SR1 Sliding Rigger is a “V” rigger mounted on a trolley which rides back and forth on a pair of rails. It is  propelled by the rower’s legs while the rower’s body remains firmly seated in a rower-supplied seat that is affixed to the watercraft. When combined with a pair of Gryffyn Series 100 or Series 79 forward rowing gearboxes with oars, the result is a complete forward rowing system.

Guide Wheels

A stabilizing multi-wheel system

The SR1 employs six resilient guide wheels to keep the rigger operating smoothly fore and aft while an additional four lower wheels provide great lateral stiffness. This additional lateral axis of stiffness keeps the sliding rigger from binding when the watercraft is being firmly turned either left or right. The resilient wheels keep the rigger working quietly even if little bits of sand and debris get on the rails. The result; a smoother and quieter ride.

Dual Rails

Lightweight, high-strength, smooth rails…

The SR1’s dual-rail assembly is mounted to the watercraft with the included brackets. These can be attached with screws or screws and adhesives. There are more shapes of hulls than brands of beer so there may be some ingenuity required to get them mounted. Gryffyn designers will work with customers to make sure they get a solid solution. The rails flex in their end mounts to accommodate modern supple hulls and to dampen out some of the noise from the rolling wheels.

The SR1 has two notable features in addition to the stabilizing multi-wheel system:

Folding Arms

Stable oar support and ease of transport…

The folding arms lock in both the outboard rowing position and the inboard stowed position. Pressing the release button mounted at the junction of the two arms frees the interlocking geared arms to move together to either position. The cross brace disconnects with the pulling of one pin. It then swings outward while remaining attached at its other end so it can’t get lost or dropped.  After dismounting the gearboxes at the end of the day the arms can be folded inward to create an easy to carry unit.

Quick Release

Rapid setup/take-down!

The single cam, quick release feature allows the rigger to be removed from the rails with only two simple motions – no tools required.

quick release mechanism animation
Quick Release Mechanism in Action

These two features combine to make for simple assembly/disassembly. The rigger can be easily transported or stored.

With the arms folded the entire unit is 42’ long, 17” wide, and 18” tall. This will easily fit crosswise in the back of most small SUVs.

Oar Positioning

Avoid obstacles, maneuver to your heart’s content!

The SR1 has been designed with the oars positioned higher than in racing shells. This is done to allow the rower to depress the handles further to get the oar blades up farther out of the water. Exploring lake shores, rivers or back bayous will invariably lead to dealing with rocks and stumps and waves. The higher you can get the oars the better off you will be.


While GRYFFYNs use modern, weather resistant materials and finishes, constant exposure to water, salt water and sun will slowly degrade the finishes and leach out the bearing lubricants. The best storage location is inside, out of the weather.

Drawings and Dimensions


The dual rail SR1 assembly is designed to be attached to the watercraft at its four corners.

Right angle brackets normally do the job well. They can be rotated to align with the hull shape. When installing the SR1 be sure to mount the entire rigger assembly and move it fully forward and back to be sure there is no interference between the hull and the moving rigger parts before permanently screwing it down or gluing it in place.

The seat should be above the rails by x-xx inches. It can be lower but most people find this uncomfortable.





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