RC car front bumper and nose (kick-up) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/rc-front-bumper-nose/  (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
- The bumper protects the chassis and front suspension in collisions, and rules keep it non-hazardous and inside the body outline: no part may extend outside the body shell viewed from any direction (AARCMCC) and no hazardous protruding bumpers are allowed (ROAR).
- EFRA fixes materials: wire bumpers 2.5-4 mm wire, sheet bumpers 2.5-6.5 mm thick, closed-cell foam up to 2 cm; 1/12 bumpers may extend 13 mm ahead of the body.
- Off-road chassis sweep the front upward (kick-up) so the front rolls over obstacles; most buggies start around 25-30 deg (CompetitionX).

parameter  value or range  source
Wire bumper diameter  2.5-4 mm  EFRA
Sheet bumper thickness  2.5-6.5 mm  EFRA
Foam bumper thickness  up to 2 cm  EFRA
1/12 bumper forward extension  max 13 mm ahead of body; 6.5 mm beyond side  EFRA
Touring/GTP bumper  min 2.5 mm thick; nothing outside body shell  AARCMCC
Off-road kick-up start point  25-30 deg  CompetitionX

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- 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
- 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
- ROAR: ROAR Rule Book 2013 (club copy) — web — Publisher's page; dimensions are facts — https://www.rctech.net/forum/attachments/northwest-racers/1468674d1552337051-seattle-rc-racers-north-seatac-racing-center-2013_roar_rule_book.pdf
- CompetitionX: RC Kickup Explained — web — Publisher's page; dimensions are facts — https://www.competitionx.com/?p=363

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=rc-front-bumper-nose