TRX STABILITY BALL
- Exercise Ball
- Vinyl
- Workout
- Vinyl
A durable stability ball that holds air well over time, but budget for your own pump since none is included.
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Sizes Available
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How it ranks among the 88 exercise balls we track
4.3★ across 98 Amazon ratings, Bayesian-smoothed toward the category average.
98 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
200+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 88 exercise balls we track - how the scorecard works · full exercise balls data report. Confidence: medium - useful but incomplete evidence.Last refreshed Jul 5, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
TRX sells this stability ball in 55cm and 65cm sizes matched to rider height, shipped deflated for at-home core and balance training.
- Two sizes: 55cm and 65cm
- Anti-slip vinyl construction
- Ships deflated for compact shipping
- Includes trial access to TRX Training Club app
Who it's for
Home gym users, physical therapy clients, and trainers who already own a pump and want a durable stability ball for core, balance, or rehab work will get good use here. Not a fit for anyone expecting an inflation pump included in the box.
What buyers say
From Amazon customer reviews.
Buyers who inflated the ball themselves reported it held air reliably over weeks of use and felt sturdy enough for planks, squats, and hamstring curls. The recurring frustration is that no pump ships with the ball, which one reviewer called out sharply, and one buyer felt their ball measured larger than its labeled size.
Strengths and trade-offs
Drawn from this product's published specifications.
- Holds air without leaking over weeks of use
- Durable vinyl suited to regular strength work
- Sized by rider height for better fit
- No hand pump included
- Sizing may run larger than the labeled diameter
Performance notes
The vinyl construction is built to resist popping under repeated loading, and reviewers who tracked it over weeks reported no leakage or deflation. Sizing is meant to match rider height (55cm for 5'1 to 5'8, 65cm for 5'8 to 6'1), though at least one buyer felt their ball measured closer to 65cm than labeled. Inflation is done with a standard air pump, not an included accessory, despite instructions cautioning against it.
Specifications
| Brand | TRX |
|---|---|
| Dimensions & fit | |
| Item Weight | 2.2 pounds |
| Item Diameter | 21.7 inches |
| Size | 21.7 inches |
| Capacity & performance | |
| Age Range Description | Adult |
| Construction & materials | |
| Material Type | Vinyl |
| Construction Type | Vinyl |
| Color | Black |
| Included components | |
| Unit Count | 1 |
| Other details | |
| Sport Type | Workout |
| Number of Items | 1 |
How it compares
This product against the closest alternatives we track in exercise balls.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| TRX STABILITY BALLThis product | 4.3 / 5 | 98 | 3.8 / 5 |
| Primasole Exercise Ball for Balance Stability Fitness Workout Yoga Pilates at Home Office…Primasole | 4.6 / 5 | 2,700 | 4.5 / 5 |
| ProBody Pilates Small Exercise BallProBody | 4.5 / 5 | 13,059 | 4.4 / 5 |
| Trideer Exercise BallTrideer | 4.6 / 5 | 5,804 | 4.4 / 5 |
| Exercise Ball - Yoga Ball for Pilates & Fitness - Birthing for Pregnancy, Stability…Exercise | 4.7 / 5 | 2,300 | 4.4 / 5 |
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Questions about the TRX exercise balls
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the TRX stability ball come with a pump?
No, reviewers note a pump is not included and needs to be bought separately.
Which size should I choose?
TRX sizes the 55cm ball for heights 5'1 to 5'8 and the 65cm ball for 5'8 to 6'1.
Does the ball tend to leak air over time?
Reviewers who used it for several weeks reported it held air without deflating.