hello about the ppm i don't understand cyrillic alphabet that much so i could recognize that thanks for thatabout bmp sm since it's czech variant than shouldn't it be called bvp sm and are you sure it's a czech variant and not a czechoslovak variant i also would like to know what do you mean by driving wheels since you already told me that they aren't roadwheels than what are they return rollers if i remember correct there are four main types of wheels of afvs roadwheels return rollers idler wheels and driving wheels drive sprockets i mean driving wheels the most forward wheels of bmp one on each side gear wheels perhaps drive sprockets are more common name for them regards vladimir