Mate Im a real noob...only 5 months into this sorcery!!! LOL

As a Surveyor...well my meshes for terrain have to have minimum detail..enough for the model. BUT they also have to have enough to define features on the landscape.

I have (as we speak) 39 000 on my Me-262 and Im really only 20 % done...times 5 = 200 000 there abouts. Depends on how much detail I will put in.

Google some 3D models for sale/hire they usually have the poly count in the description.

If its not a truly visible component..then I would reduce its complexity as much as you can. The disc is high detailed as in most modern cars they are visible. If its strictly for your own purpose and not for work...do as little as you can but still make it legible if you know what I mean??

Things I think (some of the Elders might know more??) like brake lines etc you could omit? disc pads as simple as pos..etc etc..know what I mean.

The mistakes I made (and still do) is put too much detail onto components that dont really need it.

What you have done so far is good BUT now you are thinking "bugger..poly count!" LOL. Play with it a bit more and try to reduce it if you can. The trouble with circles? they flatten when you add to them..LOL I tried to replicate yours but it kept getting pulled out of shape (with only minimal poly). You are doing well..Im watching..keep posting

cheers bullet