Endorfins KS1

Owners rating:

Designed by 11x World Champion Kelly Slater, the Endorfins KS1 features an upright template for exceptional pivot, making it perfect for hollow waves and critical pockets. These fins are built with innovative carbon inlays, providing strength and flex while being extremely lightweight, composed of 90% pure air. The KS1 fins literally float on water, offering optimal performance. Compatible with Futures’ fin system, they allow for mixing and matching with other quad rears to explore various surfing sensations. This fin is the perfect pair for the FRK, FRK+, and Houdini models.

RETAIL PRICE: $130.00 USD

Specs Overview

Fin Type Thruster

Board Type: Shortboards

Ideal conditions: Hollow Waves, Critical Pockets

Family: Pivot

Template: Pivot

Materials: Carbon twill paired with a non-woven carbon veil

Flex Pattern: Medium/Stiff

Responsiveness: Medium/High

Dimensions

Front:

Small
• Base: 110.5mm (4.35”)
• Height: 113mm (4.44”)
• Area: 9200mm² (362”)
Medium
• Base: 113.5mm (4.46”)
• Height: 116.5mm (4.58”)
• Area: 9900mm² (389”)
Large
• Base: 116mm (4.56”)
• Height: 119mm (4.68”)
• Area: 10400mm² (409”)

Rear:

Small
• Base: 105.5mm (4.15”)
• Height: 109.5mm (4.29”)
• Area: 8400mm² (330”)
Medium
• Base: 109mm (4.29”)
• Height: 113mm (4.44”)
• Area: 9100mm² (358”)
Large
• Base: 111.5mm (4.38”)
• Height: 115mm (4.52”)
• Area: 9500mm² (375”)

Description by the brand

An upright fin set with incredible pivot, designed by 11x World Champ, Kelly Slater. Single Tab variants are compatible with Futures’ fin system.

Wave Type
This is Kelly Slater’s original fin set, which is an upright template that is designed to pivot. It really comes to life in hollow waves and critical pockets, or will be your choice if you prefer a tight pivot.

Fin Features
An upright template that is designed to pivot. Our team will mix and match the quad rears from this set with other fin sets to explore a variety of feelings.

Videos

Works Great With

What owners think about this board

Firewire Fins

Firewire, founded in 2006, is renowned for its innovative designs and sustainability. Based in Carlsbad, California, Firewire focuses on reducing environmental impact using eco-friendly materials and processes. Collaborating with surfing legends like Kelly Slater and Rob Machado, and iconic shapers like Dan Mann and Tomo, Firewire integrates advanced technologies like Volcanic, Ibolic, Helium, TimberTek, and LFT into their products. The company’s surfboards are celebrated for performance and durability.

Check out all of their fins here