Kenda Heavy-Duty Tubes HIGHS    -THICK! almost if not more thick than a standard tube(0.60 mm). The kenda tube is (2.25mm)    -Haven't poped yet and i'm certainly not expecting them to    -I always pop tires but not these    LOWS    -11 bucks for a tube!    -Adds a little weight at 10 oz    OVERALL    Save the money and buy them so you don't have to borrow money from some stranger and hitch hike with your bike 10 miles down the street to K-Mart to get some cheapo tube and then head on over to the local tag sale to bargin for some cheap rusty tools to put on the tube and the put your mouth over the the valve and blow all 130psi to get those snafu tires all the way full (No offense to snafu tires, they have a ton of pressure in them when full)... Submitted by Brett