Australian designed products
Introducing the Schwalbe tubes for Brompton Folding Bike. Made of a material that completely redefines bicycle tubes: extremely light, with maximum puncture protection and designed for minimum rolling resistance.
AV4 and SV4 tubes consist of 100% thermoplastic polyurethane (TPU), including the valve, and are therefore fully recyclable. Like all Schwalbe tubes, AV4 and SV4 tubes may be returned to Schwalbe at no cost using the tube recycling programme. The material of used tubes is recycled to make sealing or insulation material.
Schwalbe Tubes for brompton folding bike. THE WONDER MATERIAL FROM THE SCHWALBE INNOVATION HUB.
A bicycle tube is predominantly made of Butyl rubber. Butyl is a very elastic and airtight synthetic rubber. But as with the tire, other fillers are necessary to make up the rubber compound. The quality of a tube can vary significantly depending on the rubber compound. For instance Schwalbe tubes have extremely high air retention and elasticity. This high elasticity allows a wide range of different tire sizes to be covered.
There is a difference between heat molded and autoclave tubes. Vulcanizing in a mold improves the uniformity of wall thickness, thus reducing weight and improving air retention. For this reason the autoclave tubes which can be produced easier have become less common over the past years. Schwalbe tubes have always been made using the heat molding process.
Every tube also needs a valve, which is bonded to the tube during the vulcanizing process.
“Great inner tubes. Quality valve with threaded stem and retaining nut, which fits my Brompton rims perfectly (many others are slightly too large). Best inner tube I have found. Will be buying more of these…”
– JB, Satisfied Customer since 2018 –
“Bought these for a Brompton, originally with standard Brompton tyres, but more recently switched to Schwalbe Marathons. I quite like like the smaller cross-section, as makes slightly easier to fit and means they take up very little space if you need to carry a couple. Quality seems good with the few I’ve bought so far. Possibly lose about 5-10psi a week in my experience, riding around 125km per week.
– Mitchenall, Satisfied Customer since 2017 –
“Perfect size for Brompton. This replaces the original Kenda tube which is prone to leak at the valve neck.“
AV4 and SV4 are predominantly made of Butyl rubber. Butyl is a very elastic and airtight synthetic rubber which fits all Brompton tyres. It serves as base material for high end bicycle tubes and made in Vietnam.
AV4 and SV4 are exactly the same tube as the Brompton XL tube with the addition of a rim nut and a box. It fits all Brompton tyres. This inner tubes weighs in at just 85g and comes with a Schrader or Presta valve – that is a whopping 20g (almost 25%) lighter than the Brompton standard inner tube.
AV4 and SV4 are compatible with all Brompton Folding Bike tyres.
Like all Schwalbe tubes, AV3 AND SV3 tubes are 100% recyclable. Just like all other Schwalbe tubes, these tubes may be returned to us via the tube recycling programme.
Yes, however, a CO2 cartridge should only be used once the tube has been fully installed. Outside the tire, AV3 and SV3 tubes may only be inflated carefully until they reach a round shape and are free of folds (equivalent to max. 0.3 bar); CO2 cartridges are not intended for this purpose.
Yes, however, the tubes may only be reinstalled into a tire of the same width.
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.
The clear valve cap supplied with the Schwalbe inner tubes should be used, especially with Schrader and Presta valves. It prevents dirt / water and chemicals from getting inside the valve and causing corrosion and damage – meaning the valve / tube will last longer.
AV4 tubes comes with a Schrader valve of 40 mm length and SV4 comes with Presta Valve of 40mm length. Just like the tube, the valve is made of thermoplastic polyurethane and is also 100% recyclable.
The valve insert of AV4 and SV4 tubes are screwed in and may be replaced if necessary. Therefore, the valve stem is also suitable for extensions.