Zone Offroad 1.25" leveling kit. The strut spacers are laser cut from steel and e-coated for long lasting corrosion protection. This kit is completely bolt on and does not require disassembly of the factory strut. This is the maximum amount of "top spacer" these trucks can have and still properly work within the limits of the factory suspension.
The new trucks set about 1.5" tail-high from the factory so adding this kit levels them out nicely and creates enough space to go up 1 size tire.
For more info head to https://zoneoffroad.com/products/125-in-leveling-kit-2015-2020-chevy-colorado-gmc-canyon