Compact Power and Durability
Sizes available: 4.25 and 4.55m
Formosa’s GRT range redefines the small boat market by offering the toughness of a plate build in a compact package. Designed with innovation as a core principle, this small plate range showcases Formosa’s trademark strength, stability, and internal volume—all wrapped in a boat that’s easy to handle and unique in Australian waters.
Built with 4mm 5083 high-tensile aluminium for the bottom sheets and sides, and fully welded top decks, the GRT range is far superior to the typical pressed and stitched production tinnies seen across Australia. The boat’s generous V-hull, large beam, and big negative reverse chine provide exceptional strength, performance, and stability. High sides offer ample internal freeboard, complemented by clever storage solutions, making the GRT range perfect for those who want a robust, affordable boat that outperforms its size.
VIDEOS & REVIEWS
NEW MODEL Formosa GRT 425 Tiller | Gold Coast Boating Centre Walkthrough
All new in the Formosa plate lineup is the GRT 425 Tiller. This new piece of Aquatic Weaponry re-introduces a small boat / tiller steer design into the Formosa arsenal. The team from Gold Coast Boating Centre take a walkthrough this GRT little boat!
3D Model
TECHNOLOGY & KEY FEATURES
- 4mm 5083 High Tensile Bottom Sheets
- 4mm Plate Sides
- Fully Welded Top Decks
- Large Reverse Chine Hull
- Large Forward Casting Deck with Storage
- Wide & Deep Gunwales with Storage Side Pockets
- 6 Rod Holders
- Ready for Bow Mounted Electric Motor
- EVA foam marine flooring on lower floor and gunwales
Customise yours today
To explore all the available optional extras and create the perfect fit for your needs, start with our Boat Builder tool.
Formosa SRT Specs
Download Spec Sheets
XL — Extra Long Shaft Transom.
Transom Ladder adds 240mm to hull length.
Duckboards with Transom Ladder add 270mm to hull length.
Dry Hull Weight excludes engine, fuel, etc. It is hull and console/cabin only.
All ABP values are determined in accordance with the ABP standard and AS1799 (2021).
1Trailering height is an estimate only and based on a standard Tow-Catch trailer with keel roller height of 450mm.
2Trailering length excludes engine.
*Deck to gunwhale. (Measured midship, dependent on deck and covering).
Please refer to ABP plate attached before operating. The above information is a guide only. Pictures may include Optional Extras. Please verify details with your dealer before purchase.
| Description | 425 | 455 |
| Length Overall (excluding engine) | 4.42m | 4.91m |
| Beam Overall | 2.13m | 2.13m |
| Beam (chine-to-chine) | 1.91m | 1.91m |
| *Internal Freeboard | 640mm | 640mm |
| Internal Beam (m) | 1.7m | 1.7m |
| Casting Deck Height | 570mm | 570mm |
| ¹Trailering Height (overall) | 1.34m | 1.34m |
| ¹Trailering Height (top folded) | N/A | N/A |
| ²Trailering Length | 5.2m | 5.4m |
| Bottom Sheets (5083) | 4mm | 4mm |
| Side Sheets | 4mm | 4mm |
| Deadrise | 13° | 13° |
| Dry Hull Weight | 325kg | 380 kg |
| Max HP | 60HP | 70HP |
| Fuel Capacity | Tote Tank | 65L underfloor |
| Transom Leg Length | L | L |
| Max Engine Weight | 130kg | 166 kg |
| Max Load Capacity | 567kg | 622 kg |
| Max Passengers | 4 | 4 |