will it be okay to install on my 2016 trek domane with a disc brake, an oversized pulley wheel system? the upper pulley has 13 tooth and the lower one has 19 tooth. thank you.

I have installed this item onto current Shimano drivetrains.... just have to choose the appropriate one. Does limit range. Example.... If the rider is using a cassette outside of the recommended Shimano range for the give derailleur then it is a no go. If staying in spec for max tooth count then yes. link here https://www.ceramicspeed.com/en/cycling/shop/oversized-pulley-wheel-systems/

I do not know the answer....sorry..but I bet Phil @ Trek here in SR can....