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donut_v2

3D printing wheels and tires for the Renault Alpine A110 and Citroen 2cv

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I made two types of hub caps. One will require cutting the shaft and using a low profile nut so everything fits underneath. The other will allow using the stock nut and shaft with no mods but will not look as scale.

497268211_2cvtwocaps.jpg.b5dbebbc58dac886aca93c48ab110af2.jpg     669825870_2cvtwocapsB.jpg.4c279e8cc9890f92b9801f65f1191715.jpg

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Created a tread pattern for the 2cv tire based on pics from the web

.2cvTire.JPG.9968ffe595a1c50a5f51a33302b235fb.JPG

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They really do look like a pair of Michelin. What’s the outside diameter of your tyres?

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@Collin

Here are a couple of test prints of the A110 rim using an FDM printer. Nothing a little surfacer can't fix. The 2cv tire was printed on an FDM printer using NinjaFlex. You can also check out my old Beetle build that has pictures of rims and tires created on an FDM printer.

fdmtest01.jpg.a9ca53aa4820ef84408758dc13e02938.jpgfdmtest02.jpg.58bcd782f9326d26816b6979329e1581.jpgfdmtest03.jpg.efa72689ae8cf643d0ea3e35eac3d987.jpg 

 

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Ok. Its just that I printed PETG rims for my buggy and I use it really hard. The first set broke pretty fast and the second one seems to be just fine, but lot more material. Now its about the doble weight then the original Tamiya rims. Hehe, I didnt wanted to make it heavier.

Now I think your rims are closed ones and have no spokes, also the 2CV and Beetle wouldnt run on a Buggy track.

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Absolutely superb, those michelins are perfect. My favourite, if not the only tyre for a 2cv. I always had them on my 1:1s.

I'll be ordering a set of wheels from Shapeways. Can I ask if you get all 4, or is the price for 1 only?

Would love a set of tyres, maybe when the current climate calms down I can order a set. 

Again, great work.

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@Joe Bo

I'm afraid it's only for one since Shapeways tends to be expensive. As you mentioned, when the current climate calms down, I'm hoping I can offer these directly to those who are interested at a lower total cost than Shapeways. Besides, the only available flexible material they have is white TPU (not very flexible). I'm currently experimenting molding the tires in RTV so they're more durable and faster to make.

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I am amazed how realistic all of the parts you make are they are brilliant I love the fine detail on those Michelin tyres it funny as there is a pair of real ones at work I saw the thread on the beetle it looks awesome top work :)  Is there any chance you would be able to make some tyres to fit the original tiger stripe ford escort wheels as you cant get any I just wondered.

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On 4/23/2020 at 12:02 AM, Doc Hollywood said:

I am amazed how realistic all of the parts you make are they are brilliant I love the fine detail on those Michelin tyres it funny as there is a pair of real ones at work I saw the thread on the beetle it looks awesome top work :)  Is there any chance you would be able to make some tyres to fit the original tiger stripe ford escort wheels as you cant get any I just wondered.

Thanks for the compliments. 

I suppose it would be possible. It would depend on my ability to model the tire in 3d and make it suitable for 3D printing.

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On 4/14/2020 at 5:51 AM, donut_v2 said:

@Joe Bo

I'm afraid it's only for one since Shapeways tends to be expensive. A

Have you tried sprue-ing 4 wheels together? That often helps a lot with the price :)

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On 5/1/2020 at 10:22 PM, Tizer said:

Have you tried sprue-ing 4 wheels together? That often helps a lot with the price :)

I'll give it a try.

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Still waiting for the 2cv body set to arrive. In the meantime, I tried this.

Capture2.JPG.3150f80b0a2c63ce4175f23c55ef06d6.JPG

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Seriously sweet work! I dream to have an SLA or even powder sintering printer someday. My FDM printer is excellent but cannot rival SLA at such small detail.

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I tried something a little different. The problem with using flexible resin is that it's not really that flexible and definitely not stretchable. If you try to stretch it to mount on a rim, 9 times out of 10, it will break. That's the reason I print the wheels in two pieces.

This time I tried printing a mold for the 2cv tire. I printed a 2-piece mold with the joint down the middle of the tire.

mold01.jpg.31c1903f601a023541b7cec2d98c143f.jpg   mold02.jpg.afd0fb9698390e431aa326fff27d1294.jpg

However, I realized that there would probably be an ugly line where the 2 halves of the mold meet. I decided I was going to make a new mold so I used one side for a test mold of the resin I had. Unfortunately, I was not able to take a picture of the resin in the mold.

mold04.jpg.8917575292027a3e7aa92f361c7c0058.jpg   mold05.jpg.3fc61582a62a058ecc7377bef194a6ba.jpg

It turned out pretty good though. One thing I didn't apply was a release agent so the tire stuck to the mold more than I expected it to. Since I was going to make a new mold,  I decided to just break the mold and get the (1/3) tire out to see how detailed it would be. Honestly, I really like the result. This is a much faster and cheaper way to make tires. Furthermore, the tires now stretch and bend just like real tires. Super grippy, too.

mold03.jpg.30b79db4ff72fddad858b929ee52b991.jpg   mold06.jpg.5ce5bb598c3407e2e2f3f83dbb9ed5fe.jpg

 

 

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Yes!! That was one of the remaining parts of the puzzle. So the two halves could be bonded together with a flexible adhesive?

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This is where you need to go a step deeper, printing a mould so that another, more flexible mould can be cast from it, and this used to cast tires with easier removal :blink:

Anyway, this is incredible work. I love the care you take for detail. 

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21 hours ago, Superluminal said:

Yes!! That was one of the remaining parts of the puzzle. So the two halves could be bonded together with a flexible adhesive?

 

The tire will be molded in one piece using a 3 piece mould. I plan to use syringes and rubber tubing to pull the resin from the bottom to the top of the mold hopefully without leaving any air bubbles.

moldv2.thumb.JPG.72eb784afe660bebcf82315fb5427f1a.JPG

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This is the result of my third attempt at molding this tire and I think I'm almost there. Hopefully my fourth attempt will be much better because of the mistakes I learned from on this one. 

Here's the modified mold (from the previous pic I posted) which makes it easier to print and has relocated resin filling holes.

3rd00.jpg.67f3c5b94afe3b832356f3814a34db6a.jpg 3rd01.jpg.c4a1b7e921570fe848261a657bef9b23.jpg

Top half of the mold pried off. The center part of the mold I printed using flexible filament on an FDM 3d printer which makes it easier to pull out.

3rd02.jpg.fb460f6c232a5667784570b199cfa81e.jpg 3rd03.jpg.e91624db88b7e121b57a8b54ca799075.jpg 

It took a lot of effort to get the tire out of the bottom half of the mold even with a release agent applied. You can see flashing where the two parts of the mold meet and the fill holes.

While working on this mold, I discovered I have a clear 3d printing resin that the liquid rubber doesn't like sticking to. I'll be using that to make the next mold. Plus, since it's clear I can see if I've completely filled the mold.

3rd04.jpg.5af2adb14399707e3309876e3ff1e21d.jpg 3rd05.jpg.953f49bb12276d15873dbb36bf4027ef.jpg 

Most of the tread and details are still there.

3rd06.jpg.a7f2dba1d31bd6b54aba402d86df55d9.jpg 3rd07.jpg.9c24fd7efbe2989ff73f695051eff951.jpg

This is a proper rubber tire compared to the one printed with flexible resin. My 2cv body set finally arrived so I can't wait to get this done.

3rd08.jpg.f071e0bdb76fd6cbbd284f50d869e796.jpg 3rd09.jpg.91dc47b806ec0bd3dffc51bdc21468e6.jpg

 

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Excellent work you are showing here! I like how you develope your own technique with materials ect.

:wub:

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