Decathlon Itiwit SUP Fins

SUP fin compatibility guide

Which Fin Fits My Decathlon Itiwit SUP?

Itiwit is Decathlon's own SUP brand and one of the most common entry-level inflatable boards in Europe — which also means it's one of the boards people most often struggle to find the right fin for. Most of the range, including the standard X100, the Compact/Super Light and the Tandem, uses Itiwit's own pin-style slide-in fin, not a US Box. The Race R500 and Touring X500, however, use a standard US Box fin instead. We're honest about this: we don't currently stock a slide-in replacement fin, so if your board uses that system we'll tell you rather than sell you something that won't fit. Check your exact model below to see which system you have.
Model Fin box Fit
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Frequently asked questions

Are Decathlon Itiwit SUP fins universal?
No, and this is a common mix-up. Most Itiwit boards — the standard X100, Compact/Super Light and Tandem — use Itiwit's own pin-style slide-in fin, not a universal US Box. Only the Race R500 and Touring X500 use US Box.
Does Eisbach Riders sell a fin for the Itiwit X100?
Not currently. The X100 uses Itiwit's proprietary slide-in system, which we don't stock a replacement for yet. Let us know your email on the finder below and we'll notify you if that changes.
What fin does the Itiwit Touring X500 use?
The Touring X500 is one of the exceptions in the Itiwit range — it uses a standard US Box fin rather than the slide-in system found on most other Itiwit boards.

Find the right fin

Pick your board's brand and model — we'll check the fin box and show what fits.

Not sure which model you have? See how to identify your fin box →

How the fin finder works

01

Select your board brand

Choose from Red Paddle, Decathlon, Fanatic, Starboard and more.

02

Choose your exact model

We use your model — and model year where necessary — to determine the fin system.

03

Get your compatibility result

We'll show a compatible Eisbach Riders fin when we have one. If we don't, we'll tell you which system to look for instead.

Can't find your SUP?

Our compatibility database is constantly expanding. If your exact board isn't listed, identify your fin box manually or tell us the brand and model.

Identify my fin box →

Tell us which board is missing

How we verify compatibility

Our database maps SUP brands and models to their fin-box systems using manufacturer specifications, product information and compatibility checks where available. Where we cannot confidently verify a fit, the Fin Finder tells you to check rather than recommending a product as an exact match.

Compatibility database last reviewed: August 2026 · 180 board models mapped