Summer vibes surfboard fins
Summer vibes Twin Keel K1 2-Fin Set FCSii Compatible – Black Honeycomb
Summer vibes Twin Keel K1 2-Fin Set FCSii Compatible – Black Honeycomb
Summer vibes surfboard fins
Summer vibes Twin Keel K1 2-Fin Set FCSii Compatible – Black Honeycomb
Summer vibes Twin Keel K1 2-Fin Set FCSii Compatible – Black Honeycomb

Summer vibes Twin Keel K1 2-Fin Set FCSii Compatible – Black Honeycomb

$99.99
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Delivery: tracked fast couriers. Local pickup possible.

Summer vibes K1 Keel Fins - Classic Twin Keel Fin Set

The Summer vibes K1 Keel Fins are designed for surfers chasing classic twin-fin speed, smooth flow and maximum down-the-line drive. Built around a more traditional keel template, the K1 delivers effortless glide, powerful projection and that unmistakable retro fish feeling surfers love.

With a larger surface area and drawn-out keel outline, the K1 setup creates incredible hold and control while maintaining the fast, skatey feel twin-fin boards are famous for. Perfect for retro fish surfboards, wider outlines and cruisey alternative shapes, these fins are all about generating easy speed and flowing rail-to-rail surfing.

5 inches in height

6.65 inches in base length

area 25.5 square inches

Whether you're trimming down long points, carving clean open faces or making the most of soft summer surf, the Summer vibes K1 Keel Fins are built for fast fun surfing and pure twin-fin freedom.

  • Classic retro keel fin template
  • Maximum speed & down-the-line drive
  • Smooth flowing rail-to-rail feel
  • Ideal for fish surfboards & retro twins
  • Excellent hold through long carving turns
  • Lightweight honeycomb construction
  • Built for Australian surf conditions
  • Compatible with FCSii Dual tab fin systems

Perfect For

  • Retro fish surfboards
  • Classic twin fin setups
  • Alternative surf craft
  • Small to medium surf
  • Fast flowing surfing
  • Surfers chasing traditional twin-fin feel

Construction

The Summer vibes K1 Keel Fins feature lightweight honeycomb performance construction engineered for speed, durability and smooth flex. The balanced flex pattern helps generate effortless acceleration while maintaining stability and hold through longer drawn-out turns.

Fin Specifications

  • Template: Classic Twin Keel
  • Fin Setup: Twin Fin
  • Construction: Honeycomb / Fibreglass Composite
  • Base: Large
  • Rake: High
  • Drive: Maximum
  • Release: Moderate
  • Compatibility: FCSii Fin System

Why Choose Summer vibes K1 Keel Fins?

The K1 Keel Fins are designed for surfers who want maximum glide, classic fish-board speed and smooth stylish surfing. The traditional keel outline creates excellent projection and hold while maintaining the playful freedom that makes twin-fin boards so addictive to ride.

Perfect for epoxy fish surfboards, retro twins, softboards and alternative surf shapes, the Summer vibes K1 setup delivers effortless speed, flow and style in everyday conditions.

Like all Summer vibes surf hardware, the K1 Keel Fins are built for surfers chasing quality, value and maximum stoke in Aussie surf conditions.

Before you buy

The right gear, a clear fit and a real person to help.

Will these fins fit my board?

Match the fin base to your board’s fin boxes and the set to its intended setup: twin, thruster, quad, single or 2+1. Check the compatibility and rider-size information for this exact set; not every fin fits every system.

Unsure? Send us a photo of your fin boxes and your board model before buying.

Is this a single fin or a complete set?

Check the product title and inclusions for the number of fins and the intended setup: twin, thruster, quad, single or 2+1. Confirm any screws, key or adapters in the inclusions—do not assume every set includes them.

What warranty comes with these fins?

Summer vibes hardware has a 12-month guarantee against manufacturing defects from the date of purchase, for the original purchaser with proof of purchase. Normal wear, accidental damage and misuse are not manufacturing defects.

See the warranty and returns policy for your category’s terms and exclusions. If you need help, contact us with your order details and clear photos. This cover is in addition to your Australian Consumer Law rights.

What will delivery cost, and can you ship to me?

Enter your delivery address at checkout to see available services, the final shipping cost and any eligible free-delivery offer before paying. Options depend on the item and destination.

Who is Summer vibes?

Summer vibes is an independent, Australian-owned surf business run by Branchy. He designs and tests Summer vibes boards and hardware in Gold Coast surf conditions, and helps customers choose their gear personally. We also stock selected products from other brands.

Meet Branchy and the brand.

Where are you based, and can I collect my order?

We’re based at Snapper Rocks on the Gold Coast. Eligible order pickup is from our fulfilment warehouse at GC3PL, 14 Hawker Street, Currumbin Waters.

We don’t currently have a walk-in shop, although many stores nationwide stock our gear.

Choose pickup at checkout when offered, then wait for collection confirmation. Contact us to confirm warehouse hours before travelling.

Who makes our gear?

Our boards and hardware are designed and tested on the Gold Coast. We partner with experienced, family-owned manufacturers—specialists in their respective fields, with more than 20 years of surfboard and accessory manufacturing expertise.

Already ordered? Visit order help and FAQs for tracking and confirmation-email questions.

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