“Sand Runner” MOC (set 42099 alternative model) – Building Instructions

Made by: Scroll down to Vendor Info Tab


An off-road buggy as an alternative model for the 4×4 X-treme Off-Roader set.

You are buying digital instructions and parts list, no bricks are included in this order.
Need help buying your LEGO bricks? Check out this video!
How to buy your bricks using Bricklink

This video guide below will walk you through how you can use Bricklink's easy buy option to buy your bricks with a few clicks of the mouse... yes it really is that simple!
If you have not seen our guides on creating wanted lists on Bricklink we advise you check this out first.

How to create a wanted list on Bricklink using an xml file
How to create a wanted list on Bricklink using an io file

If you have any questions please do not hesitate to contact our support team who will gladly assist at [email protected]
Product Description (And More Tabs)


This is an alternative model for the set 42099. It’s an off-road buggy type of vehicle, i call it “Sand Runner”.

Physical characteristics:
39cm / 49 studs

Width: 31cm / 39 studs
Heigth: 18cm / 22 studs
Weight: 1,3Kg (with batteries)


– Independent suspension on all wheels
– Remote-controlled steering
– Remote-controlled drive on the rear wheels through a differential: RWD

Miscelanious aspects:
– The final gear ratio from the XL motors into the rear wheels is 1,62:1 it’s a bit on the fast side but can’t take on big slopes or very rough terrain.
– The front axle ground clearance are 4,5 studs, and 6 studs on the rear axle.
– The batteries can be easily swapped from below, only two liftarms need to be removed.
– The green button to turn on the hub is easily accessible through the driver’s cabin.

Making a video for this MOC was more difficult than i antecipated: since my current smartphone was being used to control it, i had to use an older smartphone for the recording. Check some real pictures below and the video at the bottom of the page. Hope you like it!



There are no reviews yet.

Be the first to review ““Sand Runner” MOC (set 42099 alternative model) – Building Instructions”

Your email address will not be published.

Vendor Information

Supes WW
Want to Become a Designer?
Only a few clicks away from starting your own LEGO designer store.
Start Today