Which inner tube, sorry I'm new

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Johnym

Active Member
Ive bought the wrong size inner tubes as spares for my bike. Please could you explain the sizing and what size I need for :

Tyres: Schwalbe Ultremo ZX 23x622 Front Schwalbe Ultremo ZX 23x622 Rear

Many thanks for any help
 

NormanD

Lunatic Asylum Escapee
that relates to a 700x23 front and rear tyre ...so any inner tube which covers 700x18/25 will do ... I use THESE as I find them the best

Don't apologies for being new ... welcome to the forums, we're here to help where we can :thumbsup:
 

PpPete

Legendary Member
Location
Chandler's Ford
How deep are your rims?
Personally I like the Schwalbe SV15 for most roadie wheels... but the valve stems are a tad short for some deeper rims.
 
As above.

The 700 is the 700mm approx outer diameter of the tyre. 622 is 622mm diameter of the rim where the tyre sits. So a 622 wheel is the same as a 700 wheel and you might see both of these quoted on rims/tyres or innertubes.

The 23 is the width of a tyre -you have 23mm width tyres. Manufacturers make one tube to fit a range of tyre widths - so you get 622 x 18/25 which means that they will fit all wheels with a 622 dia and widths between 18mm and 25mm
 
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