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Schwalbe 16 inch Inner tube - AV4



16 / 18 inch inner tube with Schrader / car type valve, made by Schwalbe

Suitable for all Brompton folding bike tyres and our most popular Brompton tube.

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We have 280 in stock




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Schwalbe 16 and 18 inch inner tube - schrader valve

This Schwalbe AV4 16/18 inch tube is our most popular inner tube - favoured by us and Brompton riders

It is exactly the same tube as the Brompton XL tube with the addition of a rim nut (see below for more info about rim nuts) and a box. It fits all Brompton tyres.

This inner tube weighs in at just 85g and comes with a Schrader / car type valve - that is a whopping 20g (almost 25%) lighter than the Brompton standard inner tube.

Why choose this inner tube over other tubes available out there?

As Gerorge Orwell didn't say "All tubes are equal, but some are more equal than others"

Schwalbe perform a leak test on all of the tubes they make (twice), including inflation for 24 hours to ensure they maintain their air pressure. The valve has a replaceable core (not found on all inner tubes).

Because the inner tube has better retention of air, it means you have to spend less time inflating and more time for you, whether it's riding, in bed before work or at the office.

You should still check the tyre pressure monthly (for most tubes it's weekly). Running a tyre under inflated will mean that you need to put more effort into cycling and can result in damage to the tube / tyre or even the rim.

The AV4 inner tube fits ETRTO / ISO tyre sizes as shown below:
37-340 - 16 x 1 3/8" and 400 x 35A
28-349 - 16 x 1 1/8"
37-349 - 16 x 1 3/8"
28-355 - 18 x 1 1/8"
35-355 - 18 x 1.35"
35-349 - 16 x 1.35" 
(The ETRTO size is the most accurate way of selecting the correct inner tube and can be found on the side of the tyre) 

Q: So - What is the purpose of a rim nut?

A: Bear in mind that unlike this tube some inner tubes don't have a rum nut
The rim nut secures the valve into the rim
Your bike can be ridden perfectly safely without a rim nut
It comes in useful when installing a tyre or attaching a pump - as it helps stop the valve being pushed inside the rim With some rims there may be a rattle/noise if the valve is not fixed - that is why often valves without a rim nut are coated in rubber
The rim nut must only be tightened by hand. Never tighten the rim nut with pliers, as this can lead to inner tube damage

Q: What is the valve cap for?

The clear valve cap supplied with the Schwalbe inner tubes should be used, especially with Schrader / car type valves. It prevents dirt / water and chemicals from getting inside the valve and causing corrosion and damage - meaning the valve / tube will last longer.

This Inner tube is compatible with the following tyres:
Brompton Kojak 32-349 / 16 x 1 1/4 inch folding tyre with reflective sidewall
Brompton Kojak 32-349 / 16 x 1 1/4 inch tan wall folding tyre
Schwalbe Kojak 32-349 / 16 x 1 1/4 inch wired tyre
Schwalbe Marathon 16 x 1.35 tyre
Schwalbe Marathon plus 16 x 1.35 tyre
Schwalbe Winter 16 x 1.2 studded tyre
Brompton Green / Kevlar tyre 

Bicycle compatiblity includes:
Brompton folding bikes
Dahon curve 16" folding bike
Mezzo D10 16" folding bike
and many more - in fact send us a message if you know one we are missing!

Fitting of the tyre / inner tube:

We recommend against using tyre levers when installing a tyre and tube, as it can cause damage to the tyre / inner tube or both. It may seem difficult or even impossible at first - but it is just technique, practice and patience

We made the below video to show how to fit without the use of levers - with the toughest to fit tyre

Made in: Indonesia

Valve type: Schrader / Auto / Moto / Car
Valve diameter: 8mm
Valve length: 40mm
Replaceable valve core (using valve core tool)
Comes with rim nut and valve cap

Schwalbe code: AV4 



Super fast delivery ????

Ordered late Friday afternoon (was actually intending to pop in the shop Saturday for this) ...Glad l didn’t as the service was just as it early Saturday morning????
Fantastic service again from Brilliantbikes????????????

Great tubes along with my Marathon racer tyres. So far so good????


    Super light and better than Brompton

    The original Brompton inner tubes work but are not very good when it comes to removing. The rubber valve tends to stick and the tube itself is quite large when not inflated. The Schwable have a steel valve and they are smaller which prevents any conflict with the tyre when fitting. Second and more important point is weight. Fitted these plus Kojack tyres and it has transformed my Brompton. Ok it's just an inner tube and cheap but things don't have to complicated or expensive to make a difference.

    • 3 out of 4 people found this review useful.

    Inner tube

    Well, it's an inner tube. But quality good, price OK, and prompt despatch and delivery.


      This is the right sized tube for a Brompton

      at a good price and delivery is quick.


        Two inner tubes

        Arrived very fast and price was great,it's just the package arrived torn or split open at one end ,I just hope the inner tubes have not been damaged,maybe you need stronger packaging material but over all very good , thank you ..


          What can say

          Its all be said


            Great price, great information and great delivery

            Got my first puncture on my Brompton and thought I should get a spare inner tube. BB has all the information I needed to make sure I was getting the right tube - plus they had it an unbeatable price. Ordered at 1pm on a Friday and it arrived... the next day! Amazing. Will be buying all my Brompton spares from here from now on.

            • 1 out of 1 people found this review useful.

            Top value!!

            Good price and more importantly prompt despatch.


              Spare inner tube for a Brompton.

              I bought this so as to be able to carry a spare inner tube when I rode my Brompton. Fortunately as yet I have not had to use it for that purpose. This item was delivered quickly, came with packaging intact and ws god vale for such aspeicalised item.


                Good inner tube

                I uses these inner tubes on my brompton and they work fine. I always buy from Brilliant Bikes as they deliver fast and have been nice to deal with.


                  The only inner tube for the Brompton

                  Excellent quality valve assembly. Feel reassured to have these on my bike.


                    It is round, holds air and arrived promptly

                    As always bb has it in stock and is delivered promptly! Tried to use a local dealer to work and the did not have the tyre so I got it from bb

                    • 1 out of 1 people found this review useful.

                    Brompton inner tube

                    Delivered quickly and Brompton back on the road

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                      Schwalbe 16 inch Inner tube - AV4

                      Schwalbe 16 inch Inner tube - AV4

                      16 / 18 inch inner tube with Schrader / car type valve, made by Schwalbe

                      Suitable for all Brompton folding bike tyres and our most popular Brompton tube.

                      Have a question?

                      4 Question(s) answered - see below

                      If your question has not yet been answered here, use the form below to ask something

                      *(Required - so we can email an answer - we wont show it)
                        Answered questions

                      • Asked by Eitan Minsky-Fenick
                        on 06/06/2019
                        What pressure is this tube recommended to be filled to? Answer:
                        The inner tube should be inflated to the pressure of the tyre it is in - the tyre will normally have the inflation pressure written on the side
                      • Asked by Trevor wright
                        on 09/06/2019
                        Can you post it to France please? Will pay of course. Brompton that is... Answer:
                        Hi Trevor - we can ship the AV4 inner tube to France
                      • Asked by Jeff Hilario
                        on 22/04/2020
                        Hi Brilliantbikes Are the Schwalbe AV4s compatible with the new Continental contact urbans for Bromptons? Answer:
                        Short answer - yes. In fact we prefer them to any other tube
                      • Asked by Steve
                        on 23/09/2021
                        What inner tube would you recommend for my Brompton electric please?... Answer:
                        The Schwalbe 16 inch Inner tube - AV4 is perfect for Brompton's including the Brompton Electric

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                      Data sheet

                      Comm Code40132000
                      Supplier Reference:AV4
                      Rim nut:Yes
                      Valve type:Schrader / car / auto