Innovative technology providing greater independence and accessibility.
Technical specifications
- Six-wheel drive: Zero turn radious
- Length: 1070 mm
- Width: 600 mm
- Minimal length: 940 mm
- Seat height under the cushion: 430 to 780 mm
- Maximal weight with batteries: 172 kg
- Maximum user weight: 140 kg
- Seat width: 280 to 550 mm
- Seat depth: 280 to 500 mm
- Back height: 500 to 640 mm
- Electric back tilt: 87° to 145°
- Electric seat tilt: -6° to +32°
- Batteries capacity: 2 x 80 Ah
- Distance: 30 to 35km
- Maximal speed: 6 to 10 km/h
- Wheel base: 550 mm
- Control system: VR2 or R-net
- Drop down side transfer board
- Head-rest
- Crash-tested ISO 7176-19, 10542-5
Dealers
Information Sheet
Owner’s Manual
The Spin – Spring ’18 Issue
Color Options
| Comparison | GRAVITY6 | MID | FRONT | REAR |
|---|---|---|---|---|
| Turning circle | Zero turn radius. Turning is the same as mid wheel drive system.
No castors required due to the patented omnidirectional front and rear wheels. | Small turning circumference. ✓ | Medium turning circumference. Turning in small space is difficult due to long back end. Manages tight corners well due to short front end. User must be aware of whats behind them as the longer back end can bump into objects or people when turning. ✗ | Largest turning circumference.
More difficult to manoeuvre in tight spaces. Not ideal indoors. |
| Foot plate position | Foot plate can be set at 90° as there are no castors. ✓ | Front casters are typically wider apart than the drive wheels, so 90 º footplates add less than 30mm to turning radius. ✓ | No front casters to interfere with 90º footplates, so add less than 30mm to turning radius. ✓ | Footplates typically add length to the chair as they need to be angled forward 60-80º to clear the larger front casters. Central mounted single footplate may reduce overall length. ✗ |
| Obstacle | Capable of climbing up and over a 6″ 90° curb
All wheels are powered so the Gravity6 will pull itself up and push over at the obstacles in time. The patented contiguous articulating suspension allows the transmission to flex over the obstacles and grab onto the surfaces being ascended or descended. | On uneven terrain or curbs, may get “stuck” on the front and rear casters, suspending the drive wheels off the ground.
On sand or soft ground, the drive wheels may sink into the soft terrain, causing loss of traction. Not recommended for any type of obstacle. | Better than rear and mid wheel drives for obstacle climbing and on rough ground, because the large drive wheels pull the chair over obstacles however this means dragging the rear castors over the obstacle.
Can climb obstacles up to 2″. | Drive wheels push front casters over obstacles, if the castors are not tracking due to a turn before attempting to climb an obstacle the castors will likely get stuck. less efficient than front wheel drives. ✗ |
| Inclines | Superior stability on grades up to 17° because there are no castors and all 6 wheels are in contact with surfaces there is no comparison that can be made with other PWC. ✓ | Stable chair on slopes, as front and back casters prevent tipping forward or backward.
The chair’s centre of gravity is about even with centre of chair. The drive wheels under the user make it stable over even ground. | Stability dependent on battery location.
If chair is set up with one battery behind and one in front of the seat, the chair must rely on front anti-tippers to improve stability. This would add length to the front of chair. | Least stable for tipping compared to mid and front drives, as most of chair’s mass is at the rear of the chair.
Must have anti-tippers. More likely to tip backwards when going up hill, as batteries and motor are at the rear of the chair. When going up steep hills the chair will lean back on its anti-tippers to assist in preventing chair from tipping backwards. |
| Handling at speed | All six drive wheels are on the ground this provides for safe stable acceleration the Gravity6 is unmatched for stability and control at speed. ✓ | More sensitive to change of direction than rear wheel drive, due to drive wheel position
To turn all four casters have to spin back into the direction of travel. Six points of contact. | Less stable than rear wheel drive, and tendency to fishtail when turning at high speed because the chair is pulling more weight behind it.
On hard braking, may tip forward. | Stable at higher speeds because most of the weight of the chair is around the drive wheels. ✓ |
| Ride | All 6 wheels being the same size and all are pointed in the same direction of travel meansthat your ride is very smooth.
Independent suspension and separate seat suspension makes the ride comfortable and adjustable for user comfort. | Generally have smaller casters so a harder ride than rear or front wheel.
Suspension system tends to deflect and conform to the surface. | Larger casters than mid wheel drive chairs, so smoother ride outdoors.
Can be fitted with shock absorbers on all four wheels. | Larger casters than mid wheel drive chairs, so smoother ride outdoors.
Can be fitted with shock absorbers on all four wheels. |
| Reverse | Very nimble and easy to use in all directions and at all speeds. ✓ | More sensitive to change of direction of travel than rear and front wheel drives, because their smaller casters result in an instant change of direction. ✓ | Less sensitive than mid wheel drive. The larger casters have more contact with the ground, so weight is distributed over a larger area; thus, the chair moves in the desired direction before the casters swivel. ✗ | Less sensitive than mid wheel drive. The larger casters have more contact with the ground, so weight is distributed over a larger area; thus, the chair moves in the desired direction before the casters swivel. ✗ |
| Weather / Terrain | Superior performance on all terrain in rain, deep snow, loose gravel. ✓ | Not recommended for use in wet or snowy conditions tendency is to get stuck easily. ✗ | Not recommended for use in deep snow. Snow can build up near the rear castors and restrict forward momentum. ✗ | As when climbing the chair must push the castors over or thru the snow causing reduced momentum and wheel slippage which can lead to loss of control. ✗ |
| Maintenance | The Gravity6 modular design means getting parts repaired or replaced is simple.
The wheelchair design results in less damage to motors and transmission because they are virtually mounted and are kept well above the base of the chair. This innovative design results in much lower cost of ownership. | The horizontal mounting of the motors mean that they are subject to exposure to wet and corrosive conditions in this position they are open to blunt force trauma that can bend mounts and cause the seals between the transmission and motor to leak fluid resulting in considerable loss of use higher repair costs reduced life span for the entire chair. ✗ | The horizontal mounting of the motors mean that they are subject to exposure to wet and corrosive conditions in this position they are open to blunt force trauma that can bend mounts and cause the seals between the transmission and motor to leak fluid resulting in considerable loss of use higher repair costs reduced life span for the entire chair. ✗ | The horizontal mounting of the motors mean that they are subject to exposure to wet and corrosive conditions in this position they are open to blunt force trauma that can bend mounts and cause the seals between the transmission and motor to leak fluid resulting in considerable loss of use higher repair costs reduced life span for the entire chair. ✗ |
| Totals | ✓ 9 ✗ 0 | ✓ 3 ✗ 6 | ✓ 1 ✗ 8 | ✓ 1 ✗ 8 |
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Life is a journey. Move forward with the Gravity6.