Stellar Kayaks

Stellar SI 18 Intrepid Sea Kayak
Out of StockOut of Stock
Delivery options available or pick-up instore
Pre order available in selected colours.
Regular price $4,795.00
Regular price Sale price $4,795.00

Available Options

  • Description
  • Features
  • Specifications
  • Reviews
  • Delivery Options

The Stellar Intrepid 18' (SI18) Sea Kayak, a very capable kayak with a more traditional hull design. Hard chines, a defined keel and a retractable skeg provide excellent handling in the Rock-Gardens or longer adventures. With 3 sealed storage compartments, a small day hatch in front of the cockpit and deck rigging, the SI18 provides plenty of storage options and accessibility. A moulded seat pad and thigh brace provide comfort and stability when it gets rough.

The benefits of a skeg:

    • Better Tracking: Excellent for straight-line paddling, reducing drift in wind and currents.

    • Simple and Low Maintenance: Easier to maintain with fewer moving parts.

    • No Extra Drag When Retracted: Retracted skegs don’t add drag when not in use. Helps prevent sideways drift in windy conditions, especially when actively controlled. Helps prevent sideways drift in windy conditions, especially when actively controlled.

    • Ideal for Long-Distance Touring: Best suited for calm waters or when you need stability for long-distance paddling.

Construction Options:

Advantage: The Advantage construction delivers the perfect balance of weight, stiffness, durability, and value - making it a standout choice for paddlers who want performance without the premium price tag. Built with a heat-cured, infused epoxy Fiberglass laminate and reinforced with a Soric® core, this layup is exceptionally tough and highly resistant to punctures, giving you confidence across a range of conditions. Finished with a durable gelcoat, it’s designed to handle regular use while maintaining solid on-water efficiency. Ideal as a race-ready option on a tighter budget, the Advantage construction hits the sweet spot for price-to-weight ratio, making it one of the most popular choices for paddlers looking to maximise performance per dollar.

Excel: Engineered for speed and efficiency, this ultra-light, high-stiffness construction combines Kevlar® and Fiberglass in a heat-cured epoxy laminate, finished with a durable gelcoat. A Nomex® honeycomb core enhances rigidity while keeping overall weight to a minimum, delivering exceptional on-water performance. Kevlar® reinforcement adds valuable impact strength, making this layup a smart choice for paddlers chasing a lighter, faster ski without sacrificing structural integrity. Ideal for speed or performance-focused paddlers, it offers a responsive, lively feel with every stroke. While prioritising weight savings and speed, this construction is less impact-resistant than the Multi-Sport or Advantage options, making it best suited to paddlers who value performance in cleaner conditions.

Multi Sport: Built for performance and durability, Multi Sport construction features a single-skin laminate hull crafted from premium Carbon and Kevlar® with a clear gelcoat finish. The result is a lightweight yet tough construction that delivers the ideal balance of flex and stiffness - designed to handle real-world paddling conditions with confidence. Whether you’re navigating class I–II rapids, pushing through shallow water, or opening it up on the ocean and flats, this hull is made to perform across environments without compromise. 

  • Bow and Stern Handles: Toggle handles with bungee line for easy handling in the surf and on the hand.
  • Cockpit: Adjustable padded seat, with a water bottle holder. Oval shaped Key-hole cockpit with thigh braces for good contact and boat control.
  • Decks: High Volume deck for large paddlers. Cut-aways on bow deck for narrow catch and an efficient stroke. Static perimeter lines and bungee X lines for deck rigging
  • Storage Compartments: Large oval and medium round stern hatches, medium oval bow hatch provide 3 water tight storage compartments, plus a small watertight bow deck pod for small items
  • Foot Brace: Smart Track Transitional foot brace is easy to adjust in the boat, providing stable contact points
  • Kajak-Sport Skeg: Efficient and powerful foil shaped skeg can be deployed at various depths for greater boat control.
  • Hull Design: Hard chines, shallow-V hull, with medium rocker make for a boat that can handle it all. The low drag design makes for fast paddling sea kayak.
  • Construction: Double fiberglass taped seams lines, inside and out, for incredibly strong and durable hull and deck joints. Reinforced fittings and keel line for rough water use.
  • Length: 17' 11" / 5.5 m
  • Beam: 54 cm
  • Depth: 34 cm
  • Paddler: 5' - 6' 6" / 1.5m-2 m
  • Capacity: 145 kg
  • Cockpit W: 44 cm
  • Cockpit L: 81 cm
  • Bow Storage: 57 l
  • Stern Storage: 126 l
  • Advantage Weight: 19.6 kg
  • Excel Weight: 18.5 kg

Published weights are for a white hull/deck. Colour stripes and custom finishes may vary from the published weight.

Large Item & Bulk Order Shipping Information

For large items or bulk orders (kayaks, SUPs, ski, OC1 and paddles):

  • Contact your local store for instore pickup or delivery options.
  • Order Processing: Online orders ship next business day.
  • Contact: Email: info@paddlezone.com.au Phone: 0414 345 362

Delivery Price Estimate:

  • Sydney Metro: From $50
  • Interstate Metro: From $250
  • Regional Areas: Price available on request.

Regular Delivery Areas

  • Sunshine Coast
  • Brisbane
  • Gold Coast
  • Northern NSW
  • Newcastle
  • Sydney
  • Wollongong
  • Canberra
  • Albury
  • Melbourne
  • Geelong
  • Adelaide

Additional Regional Delivery Areas (on request):

  • South Australia
  • Southeast Queensland
  • NSW South Coast
  • Regional NSW
  • Central Coast
  • Regional Victoria
  • Perth
  • Tasmania

Have further questions or need a price quote for your area? Contact us via email or phone for details!