Trim tabs — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/trim-tabs/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)
Basis: Design rules and figures from the cited sources; example geometry by Xem Studio
Catalog version: 2026-10-20

Sizes: see table below
- Trim tabs are adjustable plates at the transom that push the stern up and the bow down, and can correct list (West Marine).
- West Marine's rule of thumb: at least 1 in of tab span per foot of boat length. On an RC mono, one builder runs tabs about 1-3 mm below the hull bottom (SV Design).
- The file is a reference example built by Xem Studio from the numbers above (1 x 1.5 in RC tab (SV Design); deflection illustrative.). Sizes the sources do not fix are illustrative; scale the example to your own vehicle.

parameter  value or range  source
Span rule  >=1 in per ft of boat length  West Marine
RC tab drop  1-3 mm below bottom  SV Design (Stealthwake)
RC tab size example  1 x 1.5 in metal tabs  SV Design (Stealthwake)

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- West Marine: Selecting and Installing Trim Tabs — web — Publisher's page; dimensions are facts — https://www.westmarine.com/west-advisor/Selecting-and-Installing-Trim-Tabs.html
- SV Design: Pro Boat Stealthwake upgrades info (Feb 2022) — web — Publisher's page; dimensions are facts — https://myplace.frontier.com/~sv_design/Pro%20Boat%20Stealthwakes%20Upgrades%20Info%20SVC_Feb-2022.pdf

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/trim-tabs/index.json
API: https://xemstudio.com/api/geometry?object=trim-tabs