Wheelbase — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/wheelbase/ (sheet CC BY 4.0) Basis: Design rules and figures from the cited sources; example geometry by Xem Studio Catalog version: 2026-10-20 Sizes: see table below - A longer wheelbase is more stable, handles bumps better and steers better on exit, but turns in more slowly; a shorter one rotates quicker and shifts more weight rearward on power but is more prone to oversteer (Tekno; CompetitionX). - RC adjustments are small: 1-3 mm with hinge-pin spacers (CompetitionX); Tekno uses 1 and 2 mm spacers over 5 mm of travel. - Classes cap it: 250-270 mm for ISTC touring cars (AARCMCC), 270 mm max (EFRA). parameter value or range source RC adjustment 1-3 mm steps CompetitionX Tekno rear spacers 1 and 2 mm, 5 mm range (six settings) Tekno setup guide ISTC touring 250-270 mm AARCMCC EFRA touring max 270 mm EFRA FSAE example 1684.47 mm Univ. of Utah FSAE Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - Tekno RC: Tekno RC Setup Guide — web — Publisher's page; dimensions are facts — https://teknoforums.com/misc/Tekno-RC-Setup-Guide.pdf - CompetitionX: RC Wheelbase Explained — web — Publisher's page; dimensions are facts — https://www.competitionx.com/?p=1253 - AARCMCC: Section 3: Electric On Road, Technical Rules (Oct 2006) — web — Publisher's page; dimensions are facts — https://www.rctech.net/forum/attachments/australian-racing/180184d1162811203-aarcmcc-online-tech-road-oct-06.pdf - EFRA: EFRA Handbook 2010, Appendix 3: Electric Cars — web — Publisher's page; dimensions are facts — https://www.efra.ws/wp-content/uploads/2010/03/Handb10App3.pdf - University of Utah, Mechanical Engineering: Formula SAE Suspension System (senior design) — web — Publisher's page; dimensions are facts — https://mech.utah.edu/wp-content/uploads/2024/12/5-Formula-SAE-Suspension.pdf No true-size file yet: the published figures do not fix the whole shape; a measured scan is planned. API: https://xemstudio.com/api/geometry?object=wheelbase