A SUP motor advertisement can put watts, pounds of thrust and revolutions per minute beside one another. Each describes a different quantity. Before ranking products, identify the unit and the conditions attached to it. A larger number in one column cannot simply replace missing evidence in another.
Read the actual specification headings
Boost Surfing’s Boost Fin specification page, updated January 21, 2026, separately lists maximum motor power, maximum thrust and maximum propeller rotation speed. That separation is useful even without accepting a performance ranking: watts describe power, the thrust figure describes force, and rpm describes rotational rate. None is itself the board’s travelling speed.
The manufacturer’s Bixpy K-1 manual, specification page 11, makes another distinction. Its PP-378 V4 configuration is labelled 400 watts with thrust equivalent up to 33 lb; its PP-768 configuration is labelled 450 watts and up to 38 lb. These are attributed manufacturer figures for named power-pack combinations, not results from TRIMIX testing or an instruction to mix components.
Use a specification table before a ranking
Create one row for each documented configuration. Keep the exact motor and battery models beside the specification, the maker’s original label, its unit, and the document revision or date. Leave a cell blank when a measurement is not supplied rather than filling it from another product’s advertisement.
- Power: preserve whether the maker says input, output, nominal or maximum. If the meaning is absent, ask for clarification.
- Thrust: retain the stated force unit and ask how the figure was obtained. Do not convert it into a rider-weight allowance.
- Rotation: keep rpm tied to the identified component and test condition. It is not a speed through the water.
- Board speed: request its own measured setup and conditions. A motor specification cannot supply a missing on-water result.
Converting units can put two documented force figures on a common scale, but it cannot make their measurement methods identical. Similarly, a higher electrical power figure does not establish better propulsion efficiency or a particular board speed. Those conclusions require suitable evidence for the complete arrangement.
Resolve a conflicting number at its source
If a shop card and manual disagree, save both and ask which applies to the quoted motor and battery revision. Do not silently select the larger value or combine a power claim from one battery with a thrust claim from another. The useful purchase decision is which configuration has clear, comparable evidence for the intended use.
The TRIMIX SUP compatibility checklist covers the wider equipment record. To ask about actual SUP thruster availability and compatibility, include the board, fin-box, motor and adapter models, your country and the specific question above. There is no current public TRIMIX SUP-motor listing. An inquiry prepares a request; it does not confirm supply, compatibility, permission to use a waterway or an order.
Evidence and date notes
Evergreen practical guide checked October 30, 2026. Boost Fin specification headings; updated January 21, 2026: 2026-01-21 | Bixpy K-1 manufacturer-linked user manual, English page 11; copyright 2023 edition: undated current source; exact publication day not shown. Source dates and revisions are not new-product or new-law announcements. Manufacturer examples are attributed; no TRIMIX hands-on testing or current SUP supply is established.
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