For recreational riders
They're cheap and they work (for about 2 minutes). If you're doing something more than just transitioning from training wheels, you want to pick up something of higher quality.. I got a flat last weekend, so I opened my four pack of these.. 3 tubes later, I finished the short 7 mile ride. These are awful. Even if they go on sale for 4 pennies, don't buy them. They will give you nothing but flats (and all by the valve stem). Furthermore, bc doesn't back these up. What does that tell ya?