See screenshot above, also read/watch this:
http://tduforums.com/showthread.php?tid=24
I'm too busy to write them myself, and I don't have much experience with actually modding the physics so there are others better qualified to do it, and some guides have been submitted to me - so an online guide and most likely a read me file will be included with more detailed tips on each known one.
First things first, I don't pay attention to rims at all on cars in game, bar the Reventon. However I will be happy to include this if someone can provide me with a list of the sizes.
No. That's TDU limited.
No, that's stealing and the chances of the tools being written in the same language are slim. Also, the feature is pointless since torque curves aren't really applicable to TDU since it just uses a set torque at a set RPM.
Thank you all for your feedback.