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A 36 mm brass tubeless Presta valve with a square rubber base, alloy nut, and a fine-thread shoulder for a secure rim seal. Sold individually with cap and tool.
Brass body. Heavier than alloy on purpose — brass doesn't gall, doesn't strip, and seals more reliably long-term.
Square rubber base. Conforms to a wide range of rim profiles. Squeezes into corners that a round base bridges over.
Fine-thread alloy nut. More turns per millimeter — better, more even clamping pressure on the rim. Less likely to back off over time.
Removable Record valve core. Standard Presta workflow. Pull the core to inject sealant or to swap a leaky core in the field.
| Length | 36 mm |
| Body material | Brass |
| Nut | Alloy, fine thread |
| Base | Square rubber |
| Core | Record (removable) |
| Sold as | 1 valve, 1 cap, 1 tool |
Eclipse pioneered TPU inner tubes in 2011 — and we build the small stuff that goes with them to the same standard. Every part is selected and tested to work cleanly with TPU and with the patented all-aluminum Eclipse valve.
Thermoplastic Polyurethane (TPU) is a thermoplastic elastomer that sits between rubber and plastic — combining the elasticity of one with the processability of the other. Commercialised in the 1950s, TPU gained wide adoption in sports equipment over the past 15 years thanks to its elasticity, abrasion resistance, and durability.
TPU is known for its high elasticity, flexibility, durability, and resistance to abrasion, which makes it first choice in multiple sports applications, like bicycle grips and inner tubes. Eclipse TPU material can be stretched by over 400% before failure.
Modern TPU is a highly sustainable material which can be recycled and reused without losing significantly on its material properties, it's therefore poised to lead in future material developments
Thermoplastic Polyurethane (TPU) is a thermoplastic elastomer that sits between rubber and plastic — combining the elasticity of one with the processability of the other. Commercialised in the 1950s, TPU gained wide adoption in sports equipment over the past 15 years thanks to its elasticity, abrasion resistance, and durability.
TPU is known for its high elasticity, flexibility, durability, and resistance to abrasion, which makes it first choice in multiple sports applications, like bicycle grips and inner tubes. Eclipse TPU material can be stretched by over 400% before failure.
Modern TPU is a highly sustainable material which can be recycled and reused without losing significantly on its material properties, it's therefore poised to lead in future material developments