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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 84 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

The range of tyres suitable for Brompton folding bikes has been growing in the last few years with more offerings from Schwalbe and new tyres from Continental - this inner tube fits them all!

It is exactly the same tube as the Brompton XL (Extra Light) 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 Schwalbe Kojak 32-349 / 16 x 1 1/4 inch folding tyre with reflective sidewall
Brompton Schwalbe 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
Brompton Schwalbe Marathon Racer 16 x 1.35 tyre (black reflective / tan wall)
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 
Brompton Schwalbe One 16 inch tyre (black / tan wall)
Brompton Continental Compact Urban 16 inch tyre (all colours)

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 

Have a question?

8 Question(s) answered - see below

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

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    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
  • Asked by Beri Levi
    on 13/01/2022
    Is it compatible with Schwalbe Marathon Racer Tyre? Answer:
    Yes this inner tube is perfect for a Brompton, with a Marathon racer tyre
  • Asked by Von
    on 29/01/2022
    Which of your Brompton Schrader inner tubes still have removable valve cores please ....I was to use a self sealer. Thank you Answer:
    The AV4’s have a removable valve core, although we hae had limited success on the use of sealant due to the low volume of the inner tubes
  • Asked by a guest
    on 26/06/2022
    Hi, I have a couple of Electric Bromptons and have had several punctures with the standard Marathon Racers. I am considering replacing with Marathon Plus tyres…… my question is do I need to replace all the inner tubes with AV4s too ? Many thanks, Michael Answer:
    If the inner tubes are in good condition then no you do not need to replace them, but we do find AV4's the easier inner tubes to fit
  • Asked by Campbell Ritchie
    on 12/11/2022
    I think this tube might be easier to use than the Kenda; the blue rim tape supplied with Bromptons seems to grasp the valve stem and it is very difficult to fit. I think this valve stem will be narrower and not as difficult to fit. I managed to damage a new Kenda tube like that earlier this week. I was out in the wilds of Eskdale and the front tyre went off with a pop you could hear from a ¼ mile away. I also have a split tyre bead, which is why I am after a new cover too. Does anybody still make the old-fashioned cotton rim tape? Yes, you seem to sell it; is it worth trying that? Answer:
    The AV4 is easier to install than the Kenda as the design is slimmer. The new yellow rim tape is much better than the old blue one, link as follows:

Related items / accessories

Data sheet

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