CushCorePlus Tire Suspension System - 27.5 inch Single Replacement Plus Size Tire Insert with 44mm Presta Air Valve

One of the best tire upgrade in mtb history, but I will only give it 4 stars because this thing is soooo hard to install.

This is a very high quality product. I like the way you can turn a lightbulb into a meth pipe. It’s so convenient. Cush core rules though.