Fitterfirst RB20 Professional Rocker Board 20 Inch
- Maximum Weight Recommendation: 350 pounds
- Material: Wood
- Item Weight: 7.5 pounds
- Unit Count: 1
Last refreshed Jul 5, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A straightforward single-plane rocker board that lets you dial up difficulty with the adjustable spheres, built for rehab progression rather than advanced balance training.
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ASIN: B002GWF8B6Category: Balance Boards
Overview
A single-plane rocker board built from Baltic birch plywood, 20 inches wide, that pitches forward and back through a 10, 12 or 15 degree tilt using swappable spheres underneath. Aimed at PT clinics and home rehab rather than general gym balance work.
Rocker boards differ from wobble boards and round balance trainers by tilting on one axis only, which makes them easier to control and easier to progress in a rehab setting. The adjustable spheres let a clinician or user step up the tilt angle as ankle or knee strength improves, rather than buying a new board. At 20 inches wide the platform gives a full-stance base, which matters more for older or recovering users than for athletes chasing instability.
- 20 inch wide platform for a full stance
- Adjustable spheres set tilt to 10, 12 or 15 degrees
- Single-plane forward-back rocking motion
- Baltic birch plywood construction
Who it's for
Suits people recovering from ankle, knee or leg injury who need a controlled, progressive balance tool, plus physical therapists building a rehab program. Athletes wanting a multi-directional wobble challenge should look elsewhere since this tilts on one plane only.
Pros and cons
- Adjustable tilt lets difficulty increase as strength improves
- 20 inch platform gives a full stance for larger users
- Single-plane motion is easier to control than multi-axis boards
- No stated weight capacity
- Single-plane design won't challenge lateral balance
Performance notes
The 10, 12 and 15 degree settings come from repositioning the spheres under the board, so difficulty changes in fixed steps rather than continuously. Because the tilt runs on a single plane, the board resists tipping sideways, which keeps the exercise focused on ankle and knee stabilizer muscles instead of full-body balance. It is built from Baltic birch plywood, the material specified for the board.
Specifications
| Brand | Fitterfirst |
|---|---|
| Dimensions & fit | |
| Maximum Weight Recommendation | 350 pounds |
| Item Weight | 7.5 pounds |
| Capacity & performance | |
| Age Range Description | Adult |
| Construction & materials | |
| Material | Wood |
| Included components | |
| Unit Count | 1 |
| Other details | |
| Part Number | RB20 |
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Frequently asked questions
What is the tilt range on the Fitterfirst RB20 rocker board?
The board tilts to 10, 12 or 15 degrees depending on how the two spheres underneath are positioned.
Is the Fitterfirst Professional Rocker Board a wobble board?
No. It rocks on a single plane, forward and back, rather than wobbling in multiple directions like a round balance trainer.
What is the Fitterfirst RB20 board made from?
Baltic birch plywood, per the manufacturer's listed specs.