Slime Self-Sealing Smart Replacement Bike/Bicycle Inner Tube, Schrader 26"x1.75-2.125".
Online price $2.08. Free ship to store. In store price is $6.84 in my area.
Mixed reviews but I got ~6 pinholes the other day (thank you goatheads) and this is about as cheap as patching them.
Pre-installed with Slime Sealant to provide maximum puncture protection and prevent flat tires on your bike.
Instantly and repeatedly seals tire punctures for up to 2 years
Valve type: Schrader, Non-toxic and non-flammable.
Fits tire sizes: 26" x 1.75-2.125"; Seals tread area punctures up to 1/8? (3mm) in size.
Cleans up with water.
Was on sale at Amazon for $5.62 back in August, https://slickdeals.net/f/10497744-slime-self-healing-26-bicycle-tube-5-62-amazon?src=SiteSearchV2_SearchBarV2Algo1