
Which One Do I Need?
Match it to the ball you own — same size, same bladder.
Small (9.8" / 25 cm) → Small bladder
Medium (17.7" / 45 cm) → Medium bladder
Large (21.7" / 55 cm) → Large bladder
Swap It In About Ten Minutes
Unzip the cover, pull the old bladder out through the opening, slide the new one in, feed its valve out through the opening, pump until there are no wrinkles left, tuck the valve back in and zip it closed.
The pump, hose and nozzles that came with your ball are all reusable — this is the bladder only.
Buy It With the Ball, Not After
Most people order a spare only after they need one — and then wait for it to ship. Adding one to your first order costs less than buying it separately later, and it means the day it happens, you're already sorted.
BEFORE YOU BUY
Frequently Asked Questions
How do I know it's the bladder and not the cover?
How do I know it's the bladder and not the cover?
If the ball won't hold air but the fabric looks intact, it's the bladder. If the cover is torn or the zip has come away, that's the cover — message us, that's a different part.
How do I change it?
How do I change it?
Unzip the cover, pull the old bladder out through the opening, slide the new one in, feed its valve out through the opening, pump until there are no wrinkles left, tuck the valve back in and zip it closed.
Can I just patch the old one?
Can I just patch the old one?
Sometimes, on a clean pinhole. Most failures aren't clean pinholes — they're splits along a seam, and patches don't hold on those.
Does it come with a pump?
Does it come with a pump?
No. The pump, hose and nozzles come with the ball and are reusable — this is the bladder only.
Which size do I order?
Which size do I order?
The same size as your ball. Small bladder for the 9.8" ball, Medium for 17.7", Large for 21.7".