Review on CALPALMY AR-PRO 28 700x20-25C Road Bike Replacement Inner Tubes Presta Valve 42mm for 700c x 20, 23, 25 Tires (6 Inner Tubes + 2 Tire Levers) by Evan Hernandez

Deep wheel owners beware, these tubes are shorter than the 42mm tubes from other manufacturers. This manufacturer measured from the top of the core, while the major manufacturers measured from the outside of the valve. Unfortunately I learned this the hard way when I replaced the flat hose and couldn't bleed these hoses due to the short valve. In the image shown, Continental 42mm pipe is on top and Continental 42mm pipe is on bottom. The difference might be subtle and unimportant to many riders, but can be completely unattainable for people like me who have deeper wheels.