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CHOOSING THE CORRECT INNERTUBE

The innertube you need is determined by the size of your tyre, so the first thing you need to do is find your tyre size.
Just about every tyre will have size markings written on the side wall, Click Here for details.

Example: 12½ x 2¼ (57-203)

The first part of the size 12½ x 2¼ is the important part as this is the UK way of measuring tyres. The size in brackets is what is known as the ERTRO measurement which is the European method of measuring tyres.

Please be aware that there are many more tyre sizes than there are innertube sizes. The reason for this is that an innertube will stretch to fit the tyre, so although there are lots of different 12" tyres there are only two 12" innertubes. We have tried to simplify the process by calling some innertubes "Wide" and some "Narrow". The reason for this is that all manufacturers label their innertubes differently even though they are the same size, so an innertube marked "12 x 2.135" is suitable for a tyre marked "121/2 x 21/4".

Once you have determined your tyre size find it in the left hand column then click on the corresponding box in the right hand column. This will take you to the choice of innertubes for your tyre. If your tyre size is not listed please send us a contact message so we can point you in the right direction.

If you have
this Tyre

You need this InnerTube

81/2 x 2

10 x 1.75
10 x 1.90

10 x 2
10 x 2.1
10 x 2.125

12 x 1.75
121/2 x 1.75
121/2 x 1.75 x 21/4
(47-203)

121/2 x 21/4
12 x 21/4
12 x 2.125
12 x 2.135
(54-203)
(57-203)
(62-203)

255 x 50
255 x 60

270 x 47-203
280 x 45-203
280 x 50

280 x 65-203
280 x 70-203

300 x 55

14 x 1.75
14 x 1.90
14 x 1.95
14 x 2.0
14 x 2.1
14 x 2.125

16 x 1.75
16 x 1.90
16 x 1.95
16 x 2.0
16 x 2.1
16 x 2.125

CHOOSING THE CORRECT SIZE
 

<ul>
<a onclick="window.open('http://www.oybcycles.com/tyre_size_markings.html','linkname','scrollbars=yes,width=320,height=259');" href="javascript:void(0)">Look at your existing tyres</a> Just about every tyre will have size markings written on the side wall. 
Example:     12½ x 2¼  (57-203)
The first part of the size 12½ x 2¼ is the important part as this is the UK way of measuring tyres. The size in brackets is what is known as the ERTRO measurement which is the European method of measuring tyres. If your tyre has the above markings simply look through our online store for all tyres & inner tubes size 12½ x 2¼. The following link will take you directly to a selection of the most relevant products.
</ul>

On Yer Bike Peterborough

541 Lincoln Road Peterborough, United Kingdom PE1 2PB

Telephone: 01733 561550 Fax: 01733 564773