Since I have had an impossible time getting a patch to stick to this Kenda tube, even though the price was low, it probably wasn't worth it because I can't patch a puncture. It's a throw-away product.
Also, even though I alerted the company that the valve step was NOT 32mm, as advertised, a month later I see it is still advertised as a 32mm (that is, unless they get a stock of 32mm valve stem tubes in stock)
I would have returned them except they are less than the return shipping price. I was able to shove them in the tire by doubling them over for a few inches but it was a lumpy ride and I found an actual 20 tube at a local bike shop.
I am not actually sure what size they are but not the 20 advertised.
I have 3 old Schwinn's, a Speedster, Breeze, & a Collegiate. All use the same tires & tubes for the Schwinn S-6 rims. The Kenda tires & tubes have been good. My only issue is that after a couple of years of service the glue or whatever seems to let go on the valve stem & you will feel a small blister or bubble on the lower valve stem, it will blow out. This has happened twice to me in the last year. Fortunately I was home when they blew, & not ten miles away from home.
Tubes today are porous & Iose 5-10lbs. of air per week. Now when I air up the tire weekly, I check the valve stems for the bubble. I rode 900 miles this summer 2015
I am a small bike repair shop. I buy and repair used bikes and sell them. I also repair customer bikes, Sometimes they are old classic bikes, sometimes they are top of the line new style bikes and I need parts and tires for all styles.
Bought these tubes to replace one on a pull cart that had a bad tube. Decided to replace both tubes at the same time. Unfortunately one of the tubes had a hole in it and leaked air. Lucky for me one of the old tubes was still good and I was able to re-use. Customer service is non-existent for Bike tires direct, no reply to my Email regarding this issue. I did enjoy my other purchases on this particular sales order, but based on first impressions, I will probably not do business with this company for any future cycle needs.
one of the two tubes purchased burst on when inflated first time
used these tubes as a general purpose tube with a presta type stem. used on a catrike with schwallabe marrathon plus tire. i did notice the plus tire added a noticeable drag to the bike trip, but no leaks
First tube worked great and no flats for an entire year. This year I ran over a goat head so I had to finally change a tire. Next two tubes had issues out of the box. First one had a weak wall and had a huge bulge in the tube. Second tube had a defective valve that I didn't notice till it went flat again. Hopefully this third tube will last a little longer until I get my next shipment of new tubes!
Over 35 years I have installed hundreds of tubes on family and friends bikes. It seems the tubes of late are getting worse. I don't know what the composition of rubber is but I am ever finding patches won't stick to this crap.
As cyclists we should demand at least a tube that holds air when installed. I use tuffy liners for most installs and don't feel the need for the higher priced tubes. But at the very least, I want them to hold air for the initial filling.