2008 Yaris hatchback Hitch weight limit

[dasnake]

I am going to buy a 2008 2-door hatchback. I plan on installing a hitch (maybe the hidden hitch).

I am going to install a bike rack that weight 60lbs. I will also be putting two 45lb bikes on there from time to time. Total weight 150lb.

Will that weight push down the springs so that the car will start to sag? Will it damage the car? A friend with a similar setup on a subaru installed heavier springs.

Thanks