Surfski IndexFind the surfski that fits you
Feedback
229craft

Carbonology · Double

Carbonology Boost X Double

A 7.2 m x 52 cm double on a 39 cm deck with two 42 cm buckets 21 cm deep. Extra rocker in the nose and tail lets a relatively short double pick up and hold ocean waves, and the cockpit rails are deliberately low so a crew can get back on after a swim. Two soft-cover handles are set at the knees, at the weight-wise midpoint, so one person can carry it.

Length
7.2 m
Beam
52 cm
Deck
39 cm
Lightest
15 kg
Carbonology Boost X Double — studio side profile
studio side profile · carbonologysport.com

Specifications

Length
7.2 m
Beam
52 cm
Deck height
39 cm
Category
Double
Skill level
intermediate
New price
A$4,000

Layup weights

Glass Vacuum23 kg
Hybrid20 kg
Carbon18 kg
Honeycomb Deck17 kg
Full Honeycomb15 kg

On-water profile

Stability
8.0
Speed
6.5

Both scores are rated at the hull's own design weight. How these are derived.

Carbonology scores it 4 on its own 1-10 scale, between the Cruze X double at 1 and the Zest X double at 7, and it is the boat the maker points family and mixed-ability crews at. 52 cm on 7.2 m is wide for the length, which is where the stability sits; the speed rating reflects a hull that is genuinely quick for a family double but gives away waterline and beam to the Zest and Flash doubles. No independent review has been published.

Suits: Family and mixed-ability ocean paddling, downwind with a crew, club use. Rough water is within its brief.

Paddler weight

This hull is built around a paddler of about 96 kg per seat. It stays workable from 85 kg to 102 kg, and sits at its best between 90 kg and 98 kg.

Derived from published hull dimensions and calibrated against manufacturer paddler limits, not taken from a marketing range. The method, in full.

Generations

2022-

The X-generation family double, and Carbonology’s best-selling two-seater. Low cockpit rails for easier remounts and revised seat ergonomics were the changes over the previous Boost double.

What works, and what it costs you

What works

  • Low cockpit rails make a mid-ocean remount realistic for a crew
  • Rockered enough to catch runs despite the stability
  • Carries one-handed on the balance-point handles

Trade-offs

  • 7.2 m needs somewhere to live and a proper roof rack
  • Gives up real speed to the Zest X and Flash X doubles
  • Best-seller status is the maker’s claim; no third-party review exists

Where to buy

Carbonology Sport ↗

Dealers in the markets we have mapped:

Australian Paddle Sports 2026: Glass Epoxy Vacuum A$4,000, Hybrid Carbon/Glass A$4,600, Carbon Foam Epoxy Vacuum A$5,000.

Sources