Yes, Pro-Line recommends that all tires with closed cell and regular foam inserts (including Pre-Mounts) have 2 holes in the tread to prevent air from being trapped in the tire.
Make sure you use a Cyanoacrylate (CA) type glue.
The color dot is something that Pro-Line has added to the sidewall of all our tires. This identifies the compound of the tire.
Check out the Tire Selector Tool!
If you think you have received a defective item please let us know and we will be happy to review possible options for replacement or return.
We would be happy to get you a quote for the stock replacement foam that came with your Pro-Line tires!
In order to process your request, we will need proof of purchase, photos of the item(s) in question, and your complete mailing information.