MTB Frame protection

MTB Downtube Frame Protector – 15 Size Options

Protect your MTB frame from rock chips and trail damage with this printable downtube protector system. Designed for both function and style, this model gives you multiple size options so you can get a perfect fit for your bike.

What’s Included

15 different 3MF files

10 downtube size variations: wide at the bottom, narrower at the top (to match different frame shapes).

5 straight downtube sizes: 40 mm, 50 mm, 60 mm, 70 mm, and 80 mm wide.

The drawings in the images show the exact measurements so you can pick the right one.

Why You’ll Like It

Impact Protection – Keeps your downtube safe from rock chips and trail debris.

Aesthetic Finish – Clean design that blends seamlessly with your frame.

Flexible Fit – Prints flat and is thin enough to flex around your downtube, even in PLA. If needed, you can heat-form it for a perfect fit.

Easy to Mount – You can secure it using 3M VHB tape (the same adhesive technology GoPro uses). Just cut and fit the tape to your protector size before sticking it to your frame. (can easily be found on amazon)

Printing Tips

Works great in PLA or PETG (already tested).

You can also use other filaments – the design is thin and flexible.

Print flat on your bed for best results.

Real-World Test

I’ve already installed this on my 2015 Devinci Troy XP, which used 4 of the 40 mm straight downtube protectors – and it works beautifully.

👉 With 15 different options, you’ll always find a size that fits your bike. Just choose the right file, print it, apply VHB tape, and hit the trails with extra confidence.