ARRMA Granite Grom 4X4 (1/18 monster truck, ARA2102) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/arrma-granite-grom/  (sheet CC BY 4.0)
Basis: Manufacturer specifications (ARRMA (Horizon Hobby))
Catalog version: 2026-10-20

Overall (mm): length 250, width 200, height 118
- The Granite Grom is ARRMA's 1/18 4WD mini monster truck. The file is its 250 × 200 × 118 mm envelope.
- Battery bay, hex and tire sizes are not published.
- True size, no printing tolerance added. Only published numbers are used; anything not published is said so.

dimension  value
Length  9.84 in (250 mm)
Width  7.87 in (200 mm)
Height  4.65 in (118 mm)
Wheelbase  6.5 in (165 mm)
Weight (with battery)  1.77 lb (800 g)
Motor  380 28T brushed
ESC  Spektrum SLT 25A 2-in-1
Servo  Spektrum SX110
Battery  Spektrum Smart 7.4 V 1400 mAh 2S hard case

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- ARRMA (Horizon Hobby): ARRMA 1/18 Granite Grom 4X4 RTR — web — Publisher's page; dimensions are facts — https://www.arrma-rc.com/en/product/ARA2102.html

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/arrma-granite-grom/index.json
API: https://xemstudio.com/api/geometry?object=arrma-granite-grom