Tire Tubes
Got a puncture, or has the old tube cracked at the valve? This category brings together inner tubes for tube-type tires in both inch and metric sizes from Kenda and BikeMaster. It is for you if you change tubes yourself or want a spare ready for your next ride.
How to read the size on a tube
A tube typically covers a range of tire widths on one specific rim diameter. The marking 250/275-10, for example, means tire widths from 2.50 to 2.75 inches on a 10-inch rim, while an addition such as 90/100 indicates the equivalent metric tire size. Other tubes are specified with three measurements, e.g. 16X6.5X8, where the last number is the rim diameter. Among our tire tubes from Kenda and BikeMaster you will find both marking styles. Always compare with the text on the sidewall of the tire, not just with the old tube.
Choose the right valve
Designations such as TR-4, TR-6, TR-87C and TR13 indicate the valve type. The valve must fit the valve hole in the rim and the space around the hub and brake – on some wheels an angled valve is easier to reach than a straight one. If in doubt, compare with the valve currently fitted.
Fitting and maintenance
Check the rim tape and the inside of the tire for sharp edges or debris from the puncture before fitting the new tube. Inflate the tube slightly so it does not twist or get pinched between tire and rim during fitting. Check the pressure regularly, because too low pressure can make the tire creep on the rim and pull the valve askew.
Frequently asked questions
Can I use a tube with a different size than the tire?
The rim diameter must match exactly, and the tire width must be within the tube's specified range, e.g. 2.50-2.75 for 250/275-10. A tube that is too small gets stretched and thin, while one that is too large can fold and chafe.
Why does the valve go crooked or tear off?
This is typically caused by too low pressure, so the tire slips on the rim and drags the valve with it. It can also be caused by sharp edges in the valve hole or a valve that does not fit the rim.
Should I replace the tube when I replace the tire?
It is typically recommended, because a used tube stretches and takes the shape of the old tire and may have small damage at the valve. Whether it can be reused depends on its condition.
