Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!

T-Rex Bike Seat

by RobB, published

T-Rex Bike Seat by RobB May 12, 2014

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31564Views 3943Downloads Found in Sport & Outdoors


My daughter wanted to pimp out her bike. We also wanted to enter the T-Rex Remix contest, so this is what we came up with. I'm jealous of her bike now. Keep in mind, it is a work in progress. please comment. Let us know what you think. Go Print! Thanks


I sliced the T-Rex Bike Seat using Cura.
Printed with natural PLA
(view photos for screen shot of basic settings)
Layer height-0.26mm
Shell Thickness-1mm
Retraction enabled
Bottom/Top infill thickness- .8mm
Fill Density- 20%
Print Speed-40
Printing Temp-190
Bed Temp-50
Filament Flow rate- 95%

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Looks pretty damn cool. How's your daughter handling sitting on it? Also, what about modifying more t-rex parts to mount on the rest of the bike? Say, the arms clasping the front wheel and the hind legs along-side the back wheel (maybe even "standing" on the training wheels for a while)

Coz these things aren't uncomfortable enough XD

Amazing!!! I'm soooo applying it to my bike!

I just noticed that the pictures have small bikes, for kids.... how much weight does it hold?

On scale 1 to 10, how comfortable is it?

I have a bony butt, so this will be wonderful.

OH MY GOD! This is so awesome,I'm totally going to make this bigger for my bike. Wish I had one when I was a kid.

Probably uncomfortable.
==== sorry for incomprehensible text, but I used google translator, because I'm Polish.

great idea. would it be possible to make an adult version ? it would terrific on my downhill bike. specialy because in downhill you almost never sit

Your idea is pure genius!
I'm trying printing it for my elder bike.
Unfortunately failed twice out of three prints cause my print has an X Y moving plate and right before it starts printing the tube connection due to some steep printing and some shacking of the piece the nozlle hit the part and skip.
To avoid this I'd like to add three 'pillars' to make it more rigid (two right under the jaws 'attachment' and one in the middle right were the flat part ('spine attachment') ends.
Tried to import in in solidworks to edit it but actually it has too many faces!
Are you able to provide me a solidwork 'more friendly' format?
(I already tried through the dxf transformation solution but didn't succeed!)
The only print that passed the critical point actually got resetted by myself playing with the printer LCD case while printing (a#sh#le!).

try meshmixer for support structure

Thats so cool!!!
But... is it actually confortable to ride?

probably not.
==== sorry for incomprehensible text, but I used google translator, because I'm Polish.

Great ideas everyone. Just wanted to say thanks. KEEP ON PRINTING

Wow! Thinking you may increase the durability by building in a fill material that can be injected in to it later. Then a clear gell cover. I like cushioning too.

Hmm, what comes to mind is using dual-extruding a PLA core (inset a couple of millimeters) with a ninjaflex skin. That way it would be more comfortable and the PLA would likely not shatter when dropped. That said, I'm still waiting for someone to make dual extrusion reliable (my Rep1 is dual, but has been used almost exclusively as single).

does it hold an adult?

Very, very clever! Although I do not imagine it being very comfortable. Awesome idea none the less.

thing is definitely the best idea for the t-rex contest, and I will be disappointed
if you don’t win!

The seat is remarkably strong. We wanted to print a working prototype for the contest. I agree , with the right material you actually print out functional bike seats. It's a work in progress and fully designed to catch your eye and not to comfort your tush.

Need to flip that thing upside down that way you dont slide off.
Didnt realize it was a kids bike.

.. winner!
Will require a fender sticker: "Please don't steal my bike."

If anything is left over from the sun's expansion into a Red Giant, may it be this "thing."

Pretty neat, not sure it would pass any safety regulations.

I think this is awesome and fully support it.
I'd be interested in knowing how well PLA holds up.
PLA would hold up if you did a high number of shells and higher infill.
The skull have thin features which might counter-act any attempts to
beef up the PLA with shellls and infill though.
The taulmon nylon suggestion would be pretty unbreakable.
Another option is to use the printed part to cast something in a more durable

Cool, printing it in Taulman nylon should make concerned parents pleased :)

It's a cool idea, but I am not sure I would let my daughter ride on a bike with PLA or ABS printed seat (possibly ABS at 100 percent infill) but not PLA, I would be worried about it fracturing due to impacts and splintering. Don't mean to be a debbie downer, but am I being overly cautious as a parent?

You could do it hollow and use hot melt infill - it would become more flexible and therefore strong, and if it did shatter, the shards would all stay glued down like the safety glass used in cars. You can find more info around the web. HMA (hot melt adhesive) infill is generally a lot cheaper than PLA/ABS printer filament too.