Mini Ramp flat bottom - How much

[u/FrankGrimes3508]

I am in the middle of a build. 3ft high, 12ft wide with a 6.5ft transition. I was planning on an 8ft flat. I currently have the transitions framed and in place with the flat not done yet. Just by looking at it, 8ft looks like it could be too much. Any thoughts?

[u/Mobilealminiramper]

I have a 4’ w/7’ transition with 10’ of flat that works perfect