{"product_id":"the-rolling-seal-kenda-tubes","title":"The Rolling Seal | KENDA Butyl Bicycle Inner Tubes 20 Inch to 700c","description":"\u003cdiv class=\"product-narrative\"\u003e\n\u003cp\u003eA flat tire does not care how much you paid for the bike. It only cares about the tube, and the tube decides whether a ride ends at the summit or at the side of the road. The Rolling Seal is a KENDA butyl inner tube, built at 0.87 mm thickness with the compound consistency that has made KENDA a factory name in bicycle rubber for decades, and it is sold in pairs because flats travel in company.\u003c\/p\u003e\n\u003cp\u003eThe range covers the geometry of real riding: MTB and BMX sizes from 20 to 29 inches, road sizes from 700c x 23 to 43c, in both Schrader and Presta valve versions. Whether you are running a commuter with a frame pump, a gravel bike with CO2 cartridges, or a kids bike that gets ridden hard and parked outside, there is a valve and size combination that matches your wheelset without adapters or guesswork.\u003c\/p\u003e\n\u003cp\u003eButyl rubber holds air measurably longer than natural rubber, which means fewer top-ups between rides and fewer surprises on cold mornings. The 0.87 mm wall keeps the tube light enough for spirited riding while staying thick enough to resist the pinch flats that come from rough pavement and trail debris.\u003c\/p\u003e\n\u003cp\u003eWhat you do not see in the spec sheet matters too: consistent wall thickness around the full circumference, cleanly molded valve stems that seat properly in the rim hole, and packaging that keeps the tube folded without creases that turn into weak points. These are the details that separate a tube that lasts two seasons from one that fails on the second ride, and they are the reason KENDA rubber has earned its place on bikes that have to be dependable.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eYou will not remember the tube on the rides it saves. That is exactly the point.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-features\" style=\"margin-top:24px;\"\u003e\n\u003ch3 style=\"font-size:18px;margin-bottom:10px;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"list-style:none;padding:0;margin:0;\"\u003e\n\u003cli style=\"padding:6px 0;border-bottom:1px solid #f0f0f0;\"\u003e✦ KENDA butyl rubber compound for slow air loss and long-term reliability\u003c\/li\u003e\n\u003cli style=\"padding:6px 0;border-bottom:1px solid #f0f0f0;\"\u003e✦ 0.87 mm wall thickness balancing weight, puncture resistance, and ride feel\u003c\/li\u003e\n\u003cli style=\"padding:6px 0;border-bottom:1px solid #f0f0f0;\"\u003e✦ Covers MTB, BMX, and road: 20, 26, 27.5, 29 inch and 700c x 23-43c\u003c\/li\u003e\n\u003cli style=\"padding:6px 0;border-bottom:1px solid #f0f0f0;\"\u003e✦ Schrader (AV) and Presta (FV) valve options for every wheelset\u003c\/li\u003e\n\u003cli style=\"padding:6px 0;border-bottom:1px solid #f0f0f0;\"\u003e✦ Sold in 2-piece sets, because spare tubes belong in the bag\u003c\/li\u003e\n\u003cli style=\"padding:6px 0;border-bottom:1px solid #f0f0f0;\"\u003e✦ Factory-spec fit and finish from one of the industry's established rubber makers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-specs\" style=\"margin-top:24px;\"\u003e\n\u003ch3 style=\"font-size:18px;margin-bottom:10px;\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul style=\"list-style:none;padding:0;margin:0;\"\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KENDA\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Butyl rubber\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eWall thickness:\u003c\/strong\u003e 0.87 mm\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eValve types:\u003c\/strong\u003e Schrader (AV) \/ Presta (FV)\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eMTB \/ BMX sizes:\u003c\/strong\u003e 20 x 1.25-2.125, 26 x 1.5-2.125, 27.5, 29 x 1.90-2.30\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eRoad sizes:\u003c\/strong\u003e 700c x 23 \/ 25 \/ 28 \/ 32 \/ 35 \/ 43c\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eValve lengths:\u003c\/strong\u003e 32 mm, 48 mm, and 60 mm options\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eApplicable bikes:\u003c\/strong\u003e MTB, BMX, road, hybrid, commuter\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003ePackage:\u003c\/strong\u003e 1 tube per box, sold as 2 pieces\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-applications\" style=\"margin-top:24px;\"\u003e\n\u003ch3 style=\"font-size:18px;margin-bottom:10px;\"\u003eWho It Is For\u003c\/h3\u003e\n\u003cp\u003eThe Rolling Seal is for every rider who has ever stood on a shoulder counting cars while holding a punctured tube: commuters on daily 20 km loops, gravel riders chasing dirt roads that end at gas stations, BMX riders who treat curbs as landings, and families maintaining a stable of bikes with different wheel sizes. Because the set covers multiple diameters and both valve standards, one order can refresh two bikes at once, and the spare that lives in your saddlebag is the one you will never regret carrying.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-faq\" style=\"margin-top:30px;\"\u003e\n\u003ch3 style=\"font-size:18px;margin-bottom:12px;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Which size do I need for my bike?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCheck the sidewall of your tire for its size marking. MTB and BMX wheels take the 20, 26, 27.5, or 29 inch tubes; road wheels take 700c tubes in the width range printed on the tire.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Schrader or Presta, how do I choose?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMatch the valve to your rim. Schrader (AV) is the wider automotive-style valve found on most entry and kids bikes; Presta (FV) is the slender valve on most road and performance bikes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why butyl instead of natural rubber?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eButyl rubber holds air significantly longer than natural rubber, meaning fewer top-ups between rides and more consistent tire pressure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Are these tubes pre-glued or patched?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, they are brand-new, unpatched KENDA butyl tubes. Install them fresh and keep the old tube as an emergency spare.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will a 700c x 28 tube fit a 700c x 25 tire?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The 700c tubes are rated across a width range (23-43c), so one tube covers multiple tire widths within that span.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do you sell single tubes?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe listing is sold in 2-piece sets, which gives you one tube in the wheel and one in the bag, the way most riders actually need them.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I store spare tubes?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eKeep spare tubes in a cool, dry place away from direct sunlight and ozone sources. Folded tubes stored in a saddlebag or drawer stay fresh for years.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-gallery\" style=\"margin-top:30px;text-align:center;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S95ce57cd5fa04d1ca9d1377e861ed9d5e.webp?v=1721872631\" alt=\"The Rolling Seal | KENDA Butyl Bicycle Inner Tubes 20 Inch to 700c\" style=\"width:100%;max-width:640px;border-radius:8px;margin:10px auto;display:block;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Sd7ed07e6a87d4e64b6a19f25047843fdq.webp?v=1721872631\" alt=\"The Rolling Seal | KENDA Butyl Bicycle Inner Tubes 20 Inch to 700c\" style=\"width:100%;max-width:640px;border-radius:8px;margin:10px auto;display:block;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S10f592f6d06f41f0ac615c49d1c60c19w.webp?v=1721872631\" alt=\"The Rolling Seal | KENDA Butyl Bicycle Inner Tubes 20 Inch to 700c\" style=\"width:100%;max-width:640px;border-radius:8px;margin:10px auto;display:block;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S7917ce7f2893460083174b2644ba35eal.webp?v=1721872631\" alt=\"The Rolling Seal | KENDA Butyl Bicycle Inner Tubes 20 Inch to 700c\" style=\"width:100%;max-width:640px;border-radius:8px;margin:10px auto;display:block;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Sa518891a499841e1b1cbb13982225625z.webp?v=1721872631\" alt=\"The Rolling Seal | KENDA Butyl Bicycle Inner Tubes 20 Inch to 700c\" style=\"width:100%;max-width:640px;border-radius:8px;margin:10px auto;display:block;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S93bce19601984da5af443c654c95044b0.webp?v=1721872631\" alt=\"The Rolling Seal | KENDA Butyl Bicycle Inner Tubes 20 Inch to 700c\" style=\"width:100%;max-width:640px;border-radius:8px;margin:10px auto;display:block;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S6c946a8c589c4ae585491242f2c20c50e.webp?v=1721872631\" alt=\"The Rolling Seal | KENDA Butyl Bicycle Inner Tubes 20 Inch to 700c\" style=\"width:100%;max-width:640px;border-radius:8px;margin:10px auto;display:block;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Sa29ff209a4af4652be6629a50e07196dr.webp?v=1721872631\" alt=\"The Rolling Seal | KENDA Butyl Bicycle Inner Tubes 20 Inch to 700c\" style=\"width:100%;max-width:640px;border-radius:8px;margin:10px auto;display:block;\"\u003e\n\u003c\/div\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"Product\",\"name\":\"The Rolling Seal | KENDA Butyl Bicycle Inner Tubes 20 Inch to 700c\",\"image\":\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S95ce57cd5fa04d1ca9d1377e861ed9d5e.webp?v=1721872631\",\"description\":\"A flat tire does not care how much you paid for the bike. 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