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How to Know Which Fin Base Option To Use

When investing in a fin upgrade, you need to make sure you have the correct fit for your board. Unfortunately, board companies have so far not agreed on the preferred standard for fin boxes.

What makes it more confusing is that to the untrained eye, both fin box systems look almost identical. Luckily we have this area covered and the details below will ensure that you get the correct fin for your board. 

 

US STANDARD Base

Fits Starboard, JP-Australia, Fanatic, Mistral, RRD and most production brands with an origin in windsurfing. This is the same fin box that’s found on many windsurfing boards and is wider and deeper, with the pin set further from the deck of the board. The base is 9.2mm thick.

US SURF Base / Longboard Base / Bahne Box

This is the same box that is standard in many surf longboards. It is a narrower and shallower base as used by SIC, Infinity, 404, Naish, Flying Fish and many more. Narrower and shallower than the US base, these boxes have the pin set closer to the deck of the board. The base is 9.0mm thick.

 

IMPORTANT: If you are unsure which base you need, look at the base of your old fin and contact us for assistance.