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. Why it works 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. Specs Length 36 mm Body material Brass Nut Alloy, fine thread Base Square rubber Core Record (removable) Sold as 1 valve, 1 cap, 1 tool Best for Tubeless setups on shallow-to-mid-depth rims (rim bed up to ~30 mm) Riders who've had alloy valves seize and want something more forgiving Replacement valves when the rubber base on your originals has hardened and started leaking What makes Eclipse different 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.
