Yes it is not uncommon to have a small bubble on the bottom of your SUP inflatable paddle board. The larger bubble (about 3" in diameter) occurs directly under the board's valve. This is because we cannot have drop stitching in that area. The bubble will not spread or inhibit the performance of the board. It is simply cosmetic.
Your inflatable paddle board may also have groups of tiny bubbles. Although this is rare, it does not affect the performance of the board at all, its simply a cosmetic issue. The layers of PVC are glued together and will commonly have small areas where dust or other small particles have settled during the manufacturing process. They too will not grow or inhibit the performance of your SUP. If you are unhappy with either of the bubbles that have formed we do sometimes give cosmetic credits for your purchase. Since these bubbles don't form often, it is likely you will never have them on your SUP inflatable paddle board. Check out our entire list of paddle boards for sale to see which iSUP is best for you.
Inflate paddle board instructions
Blow up stand up paddle board PSI Recommendations
iSUP paddle board center fin installation
Electric paddle board pump okay or not?
Best inflatable paddle board deflation technique
H3 valve wrench use on inflatable SUPs
Inflatable air valve leak troubleshooting
Blow up paddle board durability explained
Inflatable repair on paddle boards
Inflatable SUP holds air for months
Inflatable paddleboards susceptibility to damage
Stand up paddle board yoga - are iSUPs recommended?
Stand up board single or double chamber on Tower iSUPs?
Standup paddle included with iSUPs?
Stand up paddle board leash attachment point on iSUPs?
River paddle board fin option available?
Paddle board bungee work for SUP storage?
GoPro paddle board mount options
Paddle board seat option on SUP
Best inflatable stand up paddle board PSI inflation level
Inflatable paddle boat and board inflation time
Paddle board pump option for iSUPs
Blow up SUP valve type on paddle boards
Pump up paddle board gauge installation
Inflatable board iSUP gauge won't register
Beach paddle board inflation issue
Inflatable stand up paddleboards not inflating
Best iSUP warranty by tower paddle boards
Inflatable repair kit for paddle boards
SUP inflatable paddle board bubbles issue
Paddle board carrier restrictions on flights