Info Needed to Pick Out Ball Mount for Towing Trailer

Updated 03/02/2026 | Published 02/27/2026

Question:

Hi, I have a 2021 Audi Q8 Prestige that came with a tow hitch. I am looking for a 2 inch ball mount. I will be towing a boat trailer with 14 inch tires. Do you also offer the 7 prong electrical trailer light connector? Thank you

asked by: MARK K

Expert Reply:

Hey Mark, to pick out the correct ball mount for the hitch of your 2021 Audi Q8 Prestige comes down to knowing two measurements. We need to know the distance from the top of your hitch opening down to the ground as well as the distance from the bottom of your coupler lip on your trailer to the ground. The difference between those two dimensions is correct rise/drop you will need. Comment below to let me know what you have and I'll get you best option. And you need a 2 inch ball diameter right?

For example, the Curt ball mount part # C45534 that you referenced has a 2 inch drop.

Do you have a 4-way trailer wiring harness now that you want to convert to a 7-way? If so, does your trailer have brakes?

expert reply by: Jameson C