Our Cortex 55cm fitness balls are extremely versatile and inexpensive exercise tools that can be used to work out nearly every muscle group in the body. They can be used to improve your posture, core strength and overall balance and stability. Lifespan Fitness balls are made of quality anti-burst, UV resistant material and are guaranteed to last.
Our Cortex 55cm fitness balls are extremely versatile and inexpensive exercise tools that can be used to work out nearly every muscle group in the body. They can be used to improve your posture, core strength and overall balance and stability. Lifespan Fitness balls are made of quality anti-burst, UV resistant material and are guaranteed to last.
in 40 offers
Cortex Fitness Ball 55cm Grey
Our Cortex 55cm fitness balls are extremely versatile and inexpensive exercise tools that can be used to work out nearly every muscle group in the body. They can be used to improve your posture, core strength and overall balance and stability. Lifespan Fitness balls are made of quality anti-burst, UV resistant material and are guaranteed to last.
Our Cortex 55cm fitness balls are extremely versatile and inexpensive exercise tools that can be used to work out nearly every muscle group in the body. They can be used to improve your posture, core strength and overall balance and stability. Lifespan Fitness balls are made of quality anti-burst, UV resistant material and are guaranteed to last.
The lowest price for Cortex Fitness Ball 55cm Grey right now is $14.95 at RUSHK, compared across 21 retailers.
The all-time low was $13.86 on 7 July 2025 — today's price is 8% above the lowest ever. That's a little above the best price we've seen.
Prices last updated 8 June 2026.
Last updated at 08/06/2026 20:41:22
Cortex Gym Ball 55cm
Delivery between 11–23 June $9.95
Cortex Gym Ball 55cm
Delivery between 11–23 June $9.95
CORTEX Fitness Ball 55cm in Grey
Free 100-day returns
CORTEX Fitness Ball 55cm in Grey
Free 100-day returns
Cortex 55cm Fitness Gym Ball
Cortex 55cm Fitness Gym Ball
CORTEX Fitness/Gym Ball 55cm
Delivery $22.78
CORTEX Fitness/Gym Ball 55cm
Delivery $22.78
Fitness Ball 55cm
Fitness Ball 55cm
| User Weight | 300kg |
| Packaging Size | 18 x 13 x 25cm (L x W x H) - 2kg |
Cortex Gym Ball 55cm
Delivery between 11–23 June $9.95
Cortex Gym Ball 55cm
Delivery between 11–23 June $9.95
CORTEX Fitness Ball 55cm in Grey
Free 100-day returns
CORTEX Fitness Ball 55cm in Grey
Free 100-day returns
Cortex 55cm Fitness Gym Ball
| User Weight | 300kg |
| Packaging Size | 18 x 13 x 25cm (L x W x H) - 2kg |
