Help with replacement tire and tube for little girls bike Good Morning,

My 4 yr old received an old bike from one of the neighbors today, unfortunately both tires are flat and cracked and there may be damage to the inner tubes as well. 

I am not able to go to a bicycle store to have them replaced. So i figured I would try and replace both myself, as I found some DIY youtube videos on how to do the process.

The challenge I am facing now is finding the correct parts to do it.

On the tire itself it says a size of 18 x 1.95, I was able to find a tire for this size on Amazon (Amazon Link). The original tires on my daughters bike look different though, a little research told me the original tires are mountain bike tires, by the looks of it. But my daughter will only be riding her bike on the road/side walks so I am assuming this tire I found on Amazon will be sufficient.

Now I am trying to find a tube for this tire, but cannot find a tube with a 18 x 1.95 size. I am even thinking that maybe I am looking for the wrong size tube for this tire size.

I have never changed a bike tire nor a tube in my life and would appreciate any assistance in locating a compatible tube for this tire.

Also if someone could tell me if this type of tire that I found on Amazon is suitable for the road/side walks.

Appreciate any help I can get.

Kind Regards,
Andrea
For a four-year old, who will be riding around your backyard or at the park, any tire that holds air will be fine.  There's no MTB-specific tyres that small. 

Those tires will be totally fine on pavement and will work well enough on dry grass too.

The tyre specs in your link are for an 18" tyre (that's the measurement across the whole wheel) which is 1.95" in width, which is the horizontal width of the tread approximately.


  18" is unusual - is it possible that it reads  16" ?


Most tires have a ETRTO code - I suspect your current tyres will say something like 47-305 on the sidewall (or possibly 305-47 which is the same thing just reversed.) It means 47mm wide tyre, and 305mm across.

The bigger number has to match your replacement tyre, but the width has some leeway.

Could you please check your old tyres for the ETRTO code, and once you have that,  the replacement must match.   Your Amazon link doesn't show a ETRTO code sadly, but there will be many others that do.



Your other option is to simply inflate the existing tyres and see if they hold air.  Depends if they're just faded, or rotted to useless.   If there are bits of rubber falling off, they're definitely in need of replacement.



As for inner tubes, the ones on your bike now may be okay even if the tyres are rotted.  You will need to add some air and see if they hold overnight.

If you do choose to buy tubes as well, there are similar numbers to match in terms of size, but the tolerances are larger.

You'll need to get two tubes of course, but the box will cover a larger range of possible sizes.  See the front of this one which covers 340,349 and 355 sizes with the same tube.



Lastly you need to have the same type of valve as the old tubes - its 99% likely you will need a Schrader valve, same as on a car tyre.