iRocker SUP Fins

SUP fin compatibility guide

Which Fin Fits My iRocker SUP?

iRocker is one of the most popular SUP brands in the US, and most of its range — Nautical, All-Around, Cruiser and Sport — uses iRocker's own flip-pin quick-lock fin box, a tool-free system that's specific to the brand. The Blackfin line, iRocker's sister brand, is the exception: it uses a standard US Box fin instead. We stock replacement fins for the quick-lock system as well as US Box, so there's a good chance we can match your board either way. Select your exact model below to see which system yours uses and what fits it.

Multiple fin systems, one brand

Model Fin box Fit
Nautical 10'6 / 11'6 iRocker Quick-Lock ✓ Universal fit
All-Around 10' / 11' iRocker Quick-Lock ✓ Universal fit
Cruiser 10'6 iRocker Quick-Lock ✓ Universal fit
Sport 11' iRocker Quick-Lock ✓ Universal fit
Blackfin Model X / XL / V US Box ✓ Universal fit

Can't find your exact model? Try the full SUP Fin Finder →

Which Fin System Does Your Board Use?

Not Sure Which Model You Have?

  • The model name is usually printed on the rail or near the tail.
  • Board length in feet is usually printed on the nose or deck.
  • Production year is sometimes printed near the fin box on newer boards.
  • The fin-box shape tells you the system: a raised box with a screw is US Box, a soft molded fin is Fixed/iFin, and side-by-side clip slots are Quick-Lock.
Still unsure? Use the SUP Fin Finder →

Popular Model Families

All-Around (10', 11')
Fin system: Quick-Lock
Recommended replacement: Classic Fin 9″

All-Around is iRocker's standard everyday board and uses the brand's own flip-pin quick-lock box, shared with the Nautical, Cruiser and Sport lines. Our Classic Fin 9″ (Quick-Lock) is built for this system — it won't interchange with a US Box fin, so check the box style before ordering if you're not sure which you have.

Shop compatible Quick-Lock fins →
Blackfin Model X / XL / V
Fin system: US Box
Recommended replacement: Classic Fin 9″

Blackfin is iRocker's sister brand and the exception to the quick-lock rule — every Blackfin model uses a standard US Box fin instead. If your board is badged Blackfin rather than iRocker, this is the system you have. Our Classic Fin 9″ fits the US Box.

Shop compatible US Box fins →

Check These 4 Things Before Ordering

1
Board model
Confirm your exact model — ranges within the same brand can use different fin systems.
2
Fin system
Identify whether your board uses US Box, Quick-Lock, Slide-In, or a fixed Fixed/iFin.
3
Fin-box condition
Check the box or track isn't worn or damaged before fitting a new fin.
4
Model year
Some brands have changed fin systems across generations — check when your model changed if you're unsure.

Frequently asked questions

What fin system does iRocker use?
Most of the standard iRocker range — Nautical, All-Around, Cruiser and Sport — uses iRocker's own flip-pin quick-lock fin box, a tool-free system specific to the brand.
Does Blackfin use the same fin as iRocker?
No. Blackfin, iRocker's sister brand, uses a standard US Box fin rather than iRocker's flip-pin quick-lock system — they're not interchangeable.
Can I use a US Box fin on my iRocker Cruiser?
No. The Cruiser uses iRocker's proprietary flip-pin quick-lock box, not a US Box. You'll need a fin made for that specific system.

Learn More About SUP Fins

SUP Fin Finder
Find the correct fin from your exact board model.
Identify Your Fin Box
Not sure what system your board uses? Identify it here.
US Box Fins Explained
How the most common fin system works and what fits it.
Quick-Lock Fins Explained
How tool-free Quick-Lock fin boxes work and what fits them.

Find Fins For Another SUP Brand

Red Paddle CoStarboardFanaticNaishIndianaBluefinMistralJobeDecathlon Itiwit View all SUP brands →
Fin Finder SUP Your board Your fins

What SUP do you have?

Choose your board brand and model. We'll identify its fin system and show you fins that fit.

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

Board not listed? Identify my fin system→ · Tell us what's missing→

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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

We map SUP brands and models to their fin systems using manufacturer specifications and product information. If we can't confidently verify a fit, we'll tell you rather than recommend the wrong fin.

Database last updated August 2026 · 180 SUP models mapped