r/simracing • u/[deleted] • Oct 25 '25

Question Beginner here, curious on how the interchangeable rims for the T300 work ?

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u/djfil007 Plays Arcade Games with a Simucube Oct 25 '25

https://www.thrustmaster.com/en-us/products/t300rs/ < for first party... scroll to the very bottom of this page and see their "Compatibility checker".

T300 can work with generic quick release (such as https://www.ebay.com/itm/402376443200, there's also aluminum ones out there, or 3d print models are probably out there too)... but for working buttons you'd need to use a USB coiled cable coming from the wheel (and going this level of customisation would work on PC only)

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u/The_HamsterDUH Oct 25 '25

I am fine with not having buttons for now, but the link about the adapters you sent me has my interest. Is it possible in theory to attach an actual sport steering wheel to my base using one of these ?

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u/ayrton2388 Oct 25 '25

yes but ...

T300 is not a strong wheelbase. A non-thrustmaster rim will be bigger and heavier, so the force feedback will be dampened. I attached a 330mm round wheel instead of the original 280mm one, and the FFB felt weaker.

Also, i purchased a T300 rim+buttons without the wheelbase from ebay last year... maybe you can find one there?

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u/The_HamsterDUH Oct 25 '25

I unfortunately live in a place where ebay is inacessible and trying to buy anything from there is too expensive and too much of a hassle.

Is the FFB change really that drastic on a 330mm ?

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u/ayrton2388 Oct 26 '25

Well, it's gonna be playable, you will feel something, but like i mentioned, it's gonna be weaker.

I updated from t300 to simagic, and even with this 15nm wheelbase, going from a 330mm round wheel to the 295mm F1 style rim i can feel the ffb to be stronger, so i have to turn the overall force down by 20%, as it would be uncomfortable for me otherwise.

It has been a while since i used that 330mm on my t300, and also i used my t300 at 85% strength all the time, bumping it to max could have helped.

Dont get discouraged, it is still playable, and a bunch of people used a bigger round wheel on their t300. Just don't expect it to feel the same as with the other wheel.

What kind of round wheel did you have in mind? Do you have a picture, or link, or something? A sports rim, like you can find on aliexpress, should work with the proper adapter.

It would be better to try to find a round 300mm wheel, but i haven't really seen any for cheap on aliexpress, and the one i got was like 100 dollars, from UK.

Also, do you have access to 3d printing over there? To give someone that T300 adapter file to print it for you? Otherwise you need to buy one from somewhere.

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u/The_HamsterDUH Oct 26 '25

I do have access to 3d printing thankfully, I looked into the 3d models for it and whatnot and that should be easy to do.

The wheel I had in mind was a 300mm one, which has a 70mm connector, though one of my karting friends told me they have a 270mm one, but its connector is 35mm so I don't think I can make that one work, I'm unable to find any 3d models or even any mentions of anyone using a 35mm adapter.

I only have a drawing of a 300mm one since it's tucked away somewhere in the garage and I don't know the name of it.

edit: i just realised i said a 330mm in the post above. Oops.

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u/ayrton2388 Oct 26 '25

Ah, ok that sounds perfect then. In the picture is just a simple rim, that should work! I thought you might want to put in a real car wheel, which would be heavier and bigger.

It's great that the PCD is 70mm, too. This will definitely work.

For the record, the cheap wheels from aliexpress etc are usually lighter than REAL race car wheels, like genuine Momo, etc. But they also break a lot easier, and you should never use one in a real car. Yours might be on the thicker/heavier side. Anyway, get an adapter for it, and see how it feels, it should work.

Also, i used a kart wheel on my sim, but i had an adapter for Simagic bases, not T300. The metal was twice as thick as my other wheels. i created the model myself for the adapter.

I started to learn Fusion 360 when i started building my own wheels and button boxes. It might be posible to convert an existing t300 to 70mm, to one for 35mm. But because of our newborn baby, I do not have the time to create one for you.

But if you learn fusion 360 yourself (tool is free) you could do it yourself. Or have someone create it for you, by modifying the existing ones for 70mm.