Traxxas Maxx v2 Battery Strap Tie Downs

This replaces the stock Traxxas Maxx (v2) battery latch system with a velcro strap system in order to use larger batteries.  Just remove the two bolt on pieces and replace with these printed ones.  Uses the stock screws for the front and rear pieces.  NOTE that you have to remove the side body panel screws (shown in pics) in order to pull out the stock bracket and to put these in.  There is a tab that keeps the bracket in place even with the two screws out on the bottom of the truck.

I used Bambu PLA using supports for the front and rear pieces.  The support material comes out fairly easily from the strap hole depending on your settings.

• 0.16mm Optimal layer height

• 5 wall loops

• 70% gyrdoid infill

• print with top of bracket on print plate (upside down)

• the .3mf file has these settings

Because of the print orientation, I added two holes in the top of the front and rear bracket to run M3 button head screws prependicular to the layers for added strength.  They don't attach to anything, they just run through the bracket to tie the layers together so they don't come apart when bashing.  The screws for the side bracket attach the piece to three of the emtpy factory screw holes on the chassis. 

• Front bracket I used one M3x16 and one M3x12 screw

• Rear bracket two M3x16 screws

• Side bracket two M3x35 and one M3x16 screw  

In keeping with the spirit of do-it-yourself, I ordered some hook and loop strapping from Amazon (link here) to make my own straps.  The strap holes in the brackets are 23mm wide, so are made for standard 20mm straps.

I only have access to a V2 Maxx to test these on, but the front and rear brackets might work with a V1 Maxx.  If someone has a V1 and tries it, please post a comment and let me know!  I don't think the side bracket is cross compatible (would need to be shorter for v1), but the front and rear brackets might be.

So far everything is holding up well!  FYI - it seems to work just fine without the side bracket.  I've been using just the front and rear brackets with a strap and all is good so far.

If you print this, please take a picture and add a make for others to see - it helps!

Changelog:

1/9/2026 - Version 3 for front and rear brackets.  I noticed when I took one of them off for something, the columns had broken where they meet the main body of the bracket.  The bracket was mainly being held in by the tab that sticks into the body of the truck.  So, I made the support columns thicker, made the screw holes deeper into the main body of the bracket so that longer underbody screws can be used that don't just go into the support pillars but also up into the main part of the bracket for added strength.  I also added a rounded corner to the front bracket.  My battery cables were touching up against this part and Version 2 has a hard corner that would have eventually rubbed the cables through.  This rounded corner gives those cables more room and a smoother surface should they touch it.