Which inner tube do I buy for this mountain bike?

Brian_Pamo

Hi all 
recently had a puncture in my 5 year old Halfords mountain bike. While I was fixing the puncture I noted the markings on the inner tube. 

It says...
CST (Made in China)
26 x 1.90 / 2.125

So, seeing as Halfords are doing 4 inner tubes for £10 I thought I’d buy some. So, I go to their website and I CAN select 26” but there is no 1.90 option. Please can someone advise if I can use the ones that are 1.75 - 2.125 or do I need the exact size or a different one?

thanks all. 

pinkladyvenus

I think the 1.75 - 2.125 should be ok as it means it will fit tyres between these measurements 

Brian_Pamo

Thank you 

molerat

Just make sure you get the correct valve.

vacheron

Agree with Molerat, if the valve looks just like that on a car tyre it is a Schrader Valve, if it is silver and more "pointy" it is a "Presta"

Don't worry about going down a size on the tube. I have done this for decades after a tip from a bike mechanic. If I have a 2.0 tyre I buy the 1.5 or 1.75 tubes. This not only makes them a little lighter and easier to carry as a spare, but there is also less chance of pinching the tube between the rim and the tyre when you replace them.

PS, in case you aren't aware, "26" is the diameter of the wheel in inches and "1.90 / 2.125" is the width of the tyre in inches .