These heavy-duty replacement inner tubes for dirt bikes with a 17'' rim and 2.5''/2.75''/3.0'' tire widths, its OD is 21.8'' or so. It fits for some 2.50-17/2.75-17, 60/100-17 60/90-17 70/100-17 70/90-17 90/80-17 60/100-17 front and rear tires
MATERIAL: Our bike inner tube is made of high quality rubber, it has a excellent airtightness, puncture resistance, explosion proof and shock absorption. It can be maintained for 6 months without inflation if used properly
ABOUT INSTALLATION: Firstly, pls check if there is any foreign objects inside the outer tires and then put the whole inner tubes into the outer tires. After that, inflate a little to ensure that the inner tube is fully installed inside the outer tires, and then fill it all at once. Do not inflate too tightly. (NOTE: It is strictly prohibited to use other sharp tools during installation)
PACKAGE INCLUDED: 2 x Inner Tube, 2 X Black Stem Valve Caps
Before shipping, each tire is inflated and tested for air tightness in water, then vacuumed after drying, finally packaged. So if there is any problem with our products, pls let us know, we will try our best to satisfied you, thanks
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