PIVOTRAX 90/90-21 or 80/100-21 (3.00 X 21) Heavy Duty Motorcycle Tube - 3mm Thick - TR4

Looks like nice quality, have not used or installed, bought as a backup, when needed. Would buy again.

Excellent product. Easy to install A+++++

It appears to be a good inner tube

Used on a vintage car.

The install was a bit rougher due to the extra thickness of the tube. Absolutely no complaints though. Thicker tubes take quite a bit more punishment.

Great tube. Solid material and solid hardware.

Im rolling again so far so good only time will tell its holding up 4 now

Update 4/27/23 - these people decided to hide my original review. I hate shady businesses. I got the tube in the mail fairly quickly. Got my bike broken down and the tire off, pulled the old tube out and installed the new tube out of the box. When I get the tire all put back together and on the bike, I realize the inner valve stem was bent (Straight out of the box). Made for a pain in the ass because the parts stores are a long ways from my house and on a Sunday everything is closed. It would be nice if they could send me a replacement valve stem.

Was just installed, durability is still to be rated in time.

Seems to be quality product