Specification BikeType : Mountain Bike Brand : PERTUAL BulletPoint1 : 【Ultra-light Inner Tube】Made of thermoplastic polyurethane elastomer material (TPU), it weighs 70% less than ordinary butyl rubber inner tubes and takes up 50% less space when placed in the pocket, these bicycle inner tube weigh a mere 56g, the inner tubes are brightly colored, easy to identify, making it easy to carry and very suitable as a portable spare inner tube BulletPoint2 : 【New Upgrade】RideNow has implemented two enhancements to the original design. Firstly, we have replaced the lightweight plastic valve stems with metal presta valves on our Inner Tube. This modification ensures better air tightness and prevents any potential leaks. Moreover, the inclusion of a removable valve core allows for effortless maintenance and replacement of the air core whenever necessary. It is also compatible with threaded extension nozzles, providing more convenience for users BulletPoint3 : 【Enhanced Air Tightness】These road bike inner tube feature presta valves ensuring superior air tightness and reliability. Choose from 45mm/65mm valve lengths to suit your bike rim. Engineered for both disc and rim brake systems, these bicycle inner tubes cater to a diverse range of road vehicles. They excel in challenging racing and riding conditions BulletPoint4 : 【Fits Multiple Tire Sizes】This MTB/Ebike series Inner Tube is compatible with many tire sizes: 29''/1.9-2.5 (Includes Bike Tube Patch Repair Kits). Ridenow offers three versions in weight for MTB/Ebike series Inner Tube: 42g、48g、56g BulletPoint5 : 【Proper Inflation Instructions】To prevent irreversible damage, avoid overinflating the inner tube when not installed in the tire. When installing, start with an initial inflation of 0.5 PSI, ensuring that the inner tube adheres closely to the tire's inner wall Color : 2 pack 45mm metal valve CompatibleTireWidthMaximum : 2.5 inches CompatibleTireWidthMinimum : 48 millimeters ExternallyAssignedProductIdentifier1 : 888571004906 ExternallyAssignedProductIdentifier2 : 0888571004906 ExternallyAssignedProductIdentifier3 : 00714401150676 GpsrSafetyAttestation : 1 ImportDesignation : Imported IncludedComponents : Road Tubes ItemDisplayDimensions_Height : 2.7 inches ItemDisplayDimensions_Length : 10.45 inches ItemDisplayDimensions_Width : 3.85 inches ItemDisplayWeight : 0.8 pounds ItemName : RideNow Bike Inner Tube, 2-Pack MTB 29"/1.9-2.5 TPU Bike Tube with 45mm Metal Presta Valve, Ultra-Light 56g & Puncture Resistant Bicycle Inner Tube(Include Bike Inner Tire Patch Repair Kits) ItemPackageDimensions_Height : 8.9916 centimeters ItemPackageDimensions_Length : 5.207 centimeters ItemPackageDimensions_Width : 6.7056 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : bike-tubes ItemWidth : 24 millimeters Manufacturer : PERTUAL Material : TPU ModelName : MTB 29/1.9-2.5 56g-45-M-2 ModelNumber : Thorn Resistant Presta Valve NumberOfItems : 1 PackageLevel : unit PartNumber : 63580 ProductDescription : Featherweight and Durable Our bike tubes are crafted using advanced Thermoplastic Polyurethane (TPU) technology, striking the perfect balance between durability and lightweight design. Taking roadbike inner tube as an example, Ridenow offers three versions for 700C: 39g,36g, 24g, and 19g. The lightest 19g version is even lighter than the self replenishing fluid injected into vacuum tires. Optimized Air Tightness RideNow bicycle tire tube uses special reinforcing materials to make TPU inner tube valves, which are structurally stable, sturdy, and durable.Choose from 45mm/65mm and 85mm Presta valve lengths to suit your bike rim. Cost-Effective for Road Cyclists Our innovative TPU inner tubes deliver exceptional puncture resistance, ensuring heightened safety. They ward off sudden flats and maintain stable performance, even at lower tire pressures. Guidelines for bike inner tube Inflation and Usage: 1.Precautions for Inflating bicycle tube: The tpu inner tube should not be inflated significantly when not installed in the outer tire, as it may cause irreversible damage. 2.Inflation Instructions for RideNow Tube: Before inflating, turn the valve inward (towards the center of the tire circle). Inflate a small amount until the inner tube is round; pressure should be kept below 0.35 bar(5 PSI) 3.Maximum Tire Inflation Pressure: Tire inflation pressure must not exceed 5 bar/72 PSI when using rims with a no-ring-lip system. 4.Include Stickers: Inner tubes come with a sticker, not a patch. The sticker is designed to stabilize the valve stem, preventing it from shaking and making noise by touching the spokes or rim during cycling. ProductSiteLaunchDate : 2024-06-19T06:10:00.690Z Size : MTB 29"/1.9-2.5 56g Style : 48mm Valve SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 1 UnspscCode : 25172500 ValveLength : 45 millimeters ValveType : Presta WarrantyDescription : 1 Year