Hey there,
as you all know, the current Rims mod is not anymore that spectacular and good looking also the fact that not all rims are paintable is anoyying a lot. Therefore I suggest to get new mod with good rims and make sure these are all paintable. I have one example below (disclaimer, no idea if they are paintable but they look very good).
The following Rim pack contains a lot of variety of different rims, there are ones for Lowriders, Offroad, Muscle and Sportscars also file size with 1,5mb is not high, I assume.
link to the rims pack
Feel free to recommend a pack that you think fits better. I think new rims would bring a lot of new fun to modify the vehicles.