Background

The release of the new 3L suspensions arm is a very good news for axle building. The previous 5l arms was too big to create short width axle with gearead hub. So it was mainly use for 1/17 truck with 62.4mm wheel.

After buying a LEGO Bronco, I start making 11-stud width axle which opens a wide range of LEGO Truck. Indeed, for trucks which have large tires compared to their width (for instance 13R22.5 14R24 or 16R20 like heavy hauler, logging truck, offroad truck, or military one), it is mandatory to reduce the width of the axle by 2 studs to comply with the scale if using the 62.4mm wheel. 

So here are the result, a 11-stud wide motorized front axle for truck with big tires at 1/19-1/21 scale, with free instructions and 3D models. Available in 3 Versions : No Onboard Version, Onboard Powered Up or PFS version.

Specifications

– 11-stud width (knuckle to knuckle), 13cm wide with 62.4mm wheel
– Geared hub + CV-join (only two needed, other are standard CV-Join)
– Inclined underneath suspensions arms (can be considered as illegal but give better ground clearance and differential secured)
– Equipped with a 28t simple bevel differential, No onboard version compatible with all the differential. Onboard version NOT compatible with red 28t of yellow 22t crown
– Steering with rack and pinion, 4 studs distance from the knuckle axis to use 180° of rotation of the Servo motor without forcing on axle end stops
– Suspended with 3 or 4 links (2+1 central or 2+2 lateral) + 2 springs with lateral movement constricted (can be replaced by harder if needed), no need of Panhard rod but you can add one for better stability
– Simple chassis for suspension mounting included (can be used for car depending of the scale)
– Free instructions with 3D model (Ldraw and Stud.io) for building convenience (authorized commercial use if credits)

About this product

The PDF instructions can be downloaded for free on this shop. The instruction contains the partlists at the end, that you can check in the instructions previews below.

Instructions preview