# Stellar S18SX

> Surfski by Stellar. Canonical page: https://surfskiindex.com/surfskis/stellar-s18sx/
> Cite as: Stellar S18SX, Surfski Index, https://surfskiindex.com/surfskis/stellar-s18sx/ (checked 2026-10-15). Terms: https://surfskiindex.com/using-our-data/

## Specifications
- Length: 5.48 m
- Beam: 51.2 cm
- Deck height: 33.7 cm
- Layup weights: Advantage 14.6 kg, Multi-Sport 14.4 kg, Excel 11.5 kg, Alpha 11 kg
- Usually paddled by: Paddlers in chop

## Ratings (Surfski Index estimates)
- Stability band 8–10 out of 10 (dimension estimate, low confidence).
- Speed rated 5 out of 10.

Modelled from published beam, length and deck height. Low confidence. Speed is our rating. Both are given at the hull's own design weight.

These ratings are Surfski Index estimates, worked out from published dimensions, traced hull shapes where we have them, and reviews. They are not supplied by the maker or timed on the water. How a ski feels depends on your weight, skill, set-up and the conditions, so use them to shortlist skis and paddle one before you buy. Method: https://surfskiindex.com/how-it-works/#limits

Evidence note: This band is estimated from published dimensions. Qualitative context includes 1 paddler report and 6 linked sources.

## Paddler weight
Estimated sweet spot 79–92 kg, broader estimated guide 65–96 kg. An estimate from hull dimensions, not the designer's intended weight.

## Suits
Flat-water fitness paddling, learning to catch runners, small-to-moderate downwind and surf-zone play; a stable stepping-stone toward narrower race skis.

## Hull
Shares the S18S G2 platform, a mid-to-high-volume 5.48m x 51.2cm hull, but strips the storage hatches for a lighter, cleaner deck. Rounded, forgiving cross-section with a rocker profile Stellar tunes for efficient flat-water paddling and catching waves, and a narrow catch that keeps the stroke close. Very stable for its class, so it doubles as a stepping-stone and surf-zone trainer.

## What works
- Very stable for an intermediate ski (51.2cm beam)
- Lighter and cheaper than the hatched S18S (Alpha ~11kg)
- Rocker tuned for catching waves; forgiving stepping-stone

## Trade-offs
- Slow relative to longer, narrower race skis
- No storage hatches, unlike the S18S Exp
- High-volume hull is less efficient under lighter paddlers

## Generations
- 2020-present (G2): Hatchless 'X' surf-trim of the S18S G2 platform: same 5.48m x 51.2cm hull as the hatched S18S Exp (Osprey) but with a streamlined deck, dual-Venturi bailer and no storage hatches, making it lighter and cheaper. Also offered as an S18SX SM for smaller-framed paddlers.

## What paddlers say
- Stellar's own product copy says the S18SX 'reduces weight and price by eliminating hatches' on the S18S G2 platform, with a rocker profile 'optimized for efficient paddling and catching waves' (stellarkayaks.com).

## Sources
- https://www.stellarkayaks.com/S18SX-surf-ski
- https://stellarkayaksusa.com/S18SX-surf-ski
- https://paddlezone.com.au/products/stellar-s18s-x-ski
- https://stellarkayaks.com.au/S18SX-surf-ski
- https://www.paddleshop.com.au/products/stellar-s18s-x/
- https://www.stellarkayaksusa.com/images/Stellar_Kayaks_Price_List_2026.pdf

## Prices
Current new prices and dealers: https://surfskiindex.com/surfskis/stellar-s18sx/#buy