{"title":"BMX","description":"","products":[{"product_id":"eclipse-20-bmx","title":"Performance Tube — 20\" 406 × 30–47 mm","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e35 grams. That's what a standard butyl BMX tube weighs in grams after you subtract the 65 g you saved switching to this. For a racing class where a gate reaction of 0.1 seconds separates the podium from the pack, rotational weight at the wheel is one of the few legal gains left on the table.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eWhy it works\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003e35 g.\u003c\/strong\u003e The entire tube. A typical butyl equivalent in this size runs 100 g or more. That's 65 g of rotational mass removed from each wheel — acceleration you feel from the gate and through every corner.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003e30–47 mm width range — built for race profiles.\u003c\/strong\u003e Covers slick racing tyres and treaded race rubber in the standard UCI BMX racing format (20\" × 1.35–1.75\"). Not designed for wider dirt jump or street tyres — see the BMX TPU tube if that's your setup.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eTPU grips pressure under load.\u003c\/strong\u003e In sprints, jumps, and hard landings, the tube holds its shape without the pressure creep you get from butyl under repeated impact. Consistent pressure means consistent handling — lap after lap.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003ePatented all-aluminum Presta valve with removable core.\u003c\/strong\u003e 40 mm length fits standard BMX race rims. Core is field-replaceable if it ever needs attention.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003ePatented end-to-end welding.\u003c\/strong\u003e The seam junction is where other TPU tubes fail under impact. Eclipse's process removes it.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003e100% recyclable.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-border-300\/60 py-2 pr-4 align-top font-bold\"\u003e\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-border-300\/60 py-2 pr-4 align-top font-bold\"\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eSize (ETRTO)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e406 × 30–47 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eWheel size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e20\" × 1.35–1.75\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e35 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eValve\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003ePresta, 40 mm, all-aluminum, removable core\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eTPU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eMade in\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003eGermany\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e\u003cstrong\u003eRecyclable\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-border-300\/30 py-2 pr-4 align-top\"\u003e100%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eRace setup note\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eCheck your tyre width before ordering. This tube is optimised for 30–47 mm (1.35–1.75\") race profiles. If you run wider dirt or street tyres (1.75\"+ and above), the BMX TPU tube (406 × 40–65 mm) is the correct fit.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eBest for\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eUCI BMX racing and sanctioned competition on standard 20\" race wheels\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003ePump track riding where low rotating mass improves carry speed through transitions\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eRiders who've squeezed everything else out of their setup and want the tube to match\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eInstallation — four things that matter with TPU\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eZero air on entry.\u003c\/strong\u003e Insert the valve completely flat — no exceptions. \u003cstrong\u003eNo tire levers on the second bead.\u003c\/strong\u003e A 20\" tyre bead is short; mount by hand. \u003cstrong\u003eSoft-inflate to 0.3 bar (5 psi) first\u003c\/strong\u003e, confirm the tube is seated without folds. \u003cstrong\u003eInflate in 1 bar (14 psi) steps\u003c\/strong\u003e to race pressure. Squeeze the sidewalls all the way round before full inflation.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eWhat makes Eclipse different\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eEclipse pioneered TPU inner tubes in 2011. The patented all-aluminum valve and patented end-to-end welding were designed to solve the failure modes that show up under competitive loads — not just reduce weight on a scale. Every tube is QC-checked before it ships.\u003c\/p\u003e","brand":"Eclipse","offers":[{"title":"40mm \/ 20\" - ETRTO 406mm","offer_id":50140297822534,"sku":"ECOR45400","price":19.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0811\/0673\/1334\/files\/Eclipse_Pumped_Ventil_4cm_Glatt.png?v=1775308654"},{"product_id":"eclipse-bmx-tpu-tubes-20-os20-and-24","title":"Eclipse BMX TPU Tube 20, OS20 and 24\"","description":"\u003cp\u003eAn ultralight TPU tube built for BMX racing and small-wheel performance bikes. \u003cspan style=\"text-decoration: underline;\"\u003eMade in Germany\u003c\/span\u003e with a patented all-aluminum valve and a patented end-to-end welding process.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eWhy it works\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e43–48 g, depending on size.\u003c\/strong\u003e A fraction of the weight of a butyl BMX tube. Because the saving is rotational, the effect on acceleration out of the gate, on jumps, and on spin-up between berms is disproportionately large.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for the impacts BMX hands out.\u003c\/strong\u003e TPU's high elongation absorbs landings and curb hits in a way butyl can't. Less prone to pinch flats, more confidence on hard transitions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePatented all-aluminum valve with removable core.\u003c\/strong\u003e If the core ever works loose, swap it in 60 seconds with a valve tool. No new tube needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEnd-to-end welded, not spliced.\u003c\/strong\u003e Eclipse's patented welding process eliminates the seam junction — historically the most common failure point in TPU tubes. Backed by tight in-house QC.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePacks to nothing.\u003c\/strong\u003e Smaller than a butyl spare. Fits in a hip pack or backpack pocket without rearranging anything.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e100% recyclable.\u003c\/strong\u003e When it finally wears out, it doesn't go to landfill.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eSpecs\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize (ETRTO)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e406 × 40–65 mm (20\"), 451 × 40–65 mm (OS20\"), or 507 × 40–65 mm (24\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eValve\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e40 mm Presta, all-aluminum, removable core\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTPU (thermoplastic polyurethane)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMade in\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGermany\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRecyclable\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eWeight by wheel size:\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eValve\u003c\/th\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e20\" (406 mm)\u003c\/td\u003e\n\u003ctd\u003e43 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOS20\" (451 mm)\u003c\/td\u003e\n\u003ctd\u003e45 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e24\" (507 mm)\u003c\/td\u003e\n\u003ctd\u003e48 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eWhich size fits my bike?\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e20\" (ETRTO 406)\u003c\/strong\u003e — standard BMX race and freestyle wheels, plus most kids' 20\" bikes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOS20\" (ETRTO 451)\u003c\/strong\u003e — Cruiser-class BMX race wheels and 20\" road\/triathlon bikes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e24\" (ETRTO 507)\u003c\/strong\u003e — BMX cruiser, junior race, and trial bikes.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eBest for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBMX racers and freestyle riders who want \u003cstrong\u003efaster spin-up and lighter rotational mass\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCruiser-class racers running OS20\" wheels\u003c\/li\u003e\n\u003cli\u003eJunior and dirt-jump riders on 24\" rigs\u003c\/li\u003e\n\u003cli\u003eAnyone carrying a spare who'd rather it didn't take up half their bag\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eInstalling a TPU tube — the short version\u003c\/h3\u003e\n\u003cp\u003eTPU installs differently from butyl. Four things matter:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStart with zero air.\u003c\/strong\u003e Insert the valve completely flat — no pre-inflation. This is the single most common installation mistake.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNo tire levers on the second bead.\u003c\/strong\u003e Mount by hand. Levers pinch TPU in a way they don't pinch butyl.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSoft-inflate to 0.3 bar (5 psi) first.\u003c\/strong\u003e Before closing the second bead fully, give it a small amount of air to seat the tube without folds or twists.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInflate in steps.\u003c\/strong\u003e Go up in 1 bar (14 psi) increments, not all at once. Before you hit full pressure, squeeze the sidewalls around the whole wheel to check the tube isn't peeking out anywhere.\u003c\/p\u003e\n\u003cp\u003eThat's it. Once it's seated, it behaves like any other tube.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eWhat makes Eclipse different\u003c\/h3\u003e\n\u003cp\u003eEclipse pioneered TPU inner tubes in 2011 — before the category existed commercially. The patented all-aluminum valve and patented end-to-end welding process aren't marketing language; they're engineering decisions made to solve real failure modes. Every tube is QC-checked before it ships.\u003c\/p\u003e","brand":"Eclipse","offers":[{"title":"40mm \/ 20\" - ETRTO 406mm","offer_id":54331958821190,"sku":"ECOR50400","price":19.95,"currency_code":"EUR","in_stock":true},{"title":"40mm \/ OS20\" - ETRTO 451mm","offer_id":54331960131910,"sku":"ECOR5040OS","price":19.95,"currency_code":"EUR","in_stock":true},{"title":"40mm \/ 24\" - ETRTO 507mm","offer_id":54331960164678,"sku":"ECOR50404","price":19.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0811\/0673\/1334\/files\/Eclipse_Pumped_Ventil_4cm_Glatt.png?v=1775308654"}],"url":"https:\/\/eclipse.bike\/collections\/bmx.oembed","provider":"Eclipse Tubes","version":"1.0","type":"link"}