--- product_id: 474371940 title: "2.25/2.50-16 (70/90-16) Heavy Duty Inner Tube – 2mm Butyl Rubber, TR4 Straight Valve – Fits Mini Dirt Bikes, Pit Bikes, Motocross & Trail Bikes" brand: "pivotrax" price: "€ 38.84" currency: EUR in_stock: true reviews_count: 12 category: "Pivotrax" url: https://www.desertcart.hr/products/474371940-2-25-2-50-16-70-90-16-heavy-duty store_origin: HR region: Croatia --- # TR4 Straight Valve - Leak & Bend Resistant Fits 16" Mini Dirt & Pit Bikes - Versatile Fit 2mm Butyl Rubber - Heavy Duty Durability 2.25/2.50-16 (70/90-16) Heavy Duty Inner Tube – 2mm Butyl Rubber, TR4 Straight Valve – Fits Mini Dirt Bikes, Pit Bikes, Motocross & Trail Bikes **Brand:** pivotrax **Price:** € 38.84 **Availability:** ✅ In Stock ## Summary > 🏁 Ride Hard, Ride Smart — Never Let a Flat Slow You Down! ## Quick Answers - **What is this?** 2.25/2.50-16 (70/90-16) Heavy Duty Inner Tube – 2mm Butyl Rubber, TR4 Straight Valve – Fits Mini Dirt Bikes, Pit Bikes, Motocross & Trail Bikes by pivotrax - **How much does it cost?** € 38.84 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/474371940-2-25-2-50-16-70-90-16-heavy-duty) ## Best For - pivotrax enthusiasts ## Why This Product - Trusted pivotrax brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Universal 16" Fit:** Seamlessly compatible with 2.25/2.50-16 and 70/90-16 tires on mini dirt, pit, motocross, and trail bikes. - • **Precision Valve Tech:** TR4 metal valve stem engineered for zero leaks and maximum PSI endurance under aggressive riding. - • **Shock-Absorbing Flex:** Durable yet flexible rubber absorbs bumps and rough terrain, delivering a smoother, more controlled ride. - • **Enduro-Ready Performance:** Optimized for motocross and trail riding with consistent air retention and stable handling on every ride. - • **Puncture-Resistant Armor:** 2mm reinforced butyl rubber shields you from flats and blowouts, no matter the terrain or weather. ## Overview The PIVOTRAX 2.25/2.50-16 Heavy Duty Inner Tube features a robust 2mm butyl rubber construction and a leak-proof TR4 straight valve, designed specifically for 16-inch mini dirt, pit, motocross, and trail bike tires. Engineered to resist punctures and maintain stable air pressure, it ensures reliable, smooth rides across all terrains and weather conditions. ## Description Product description PIVOTRAX We’re determined to bring you across all tracks you choose to tread. We don't plan on changing the way you ride. Rather, we are giving you a better way to conquer unknown terrains every time you start your engine. ## Features - Puncture Resistant: Designed to minimize flats and blowouts. Protects both rider and bike in all seasons and conditions—hot, cold, wet, or dry—offering dependable performance. - Versatile Fit: Replacement inner tube for 2.25/2.50-16 and 70/90-16 tires. Compatible with most 16” mini dirt bikes, pit bikes, and small off-road motorcycles. - Motocross & Enduro Ready: Engineered for motocross, enduro, trail, and pit bike riding. Provides consistent air retention, stable handling, and long-lasting reliability. - Heavy-Duty TR4 Valve Stem: Features a straight TR4 metal valve stem with seamless construction to prevent leaks and resist bending under high PSI and aggressive use. - Durable Butyl Rubber: Built with 2mm reinforced butyl rubber for strength and flexibility. Absorbs shocks, bumps, and rough terrain to deliver smoother rides on trails and motocross tracks. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B2NP5K6W | | Best Sellers Rank | #681 in Automotive ( See Top 100 in Automotive ) #2 in Powersports Inner Tubes | | Bike Type | Motocross/Enduro Bike | | Brand | PIVOTRAX | | Brand Name | PIVOTRAX | | Compatible Tire Width Maximum | 80 Millimeters | | Compatible Tire Width Minimum | 57 Millimeters | | Customer Reviews | 4.5 out of 5 stars 1,620 Reviews | | Item Diameter | 16 Inches | | Item Width | 2.25 Inches | | Manufacturer | PIVOTRAX | | Manufacturer Part Number | NT225250162MM | | Material | Rubber | | Material Type | Rubber | | Model Number | NT225250162MM | | Size | 2.25/2.50-16 (70/90-16) | | Valve Type | Schrader | | Wheel Size | 16 Inches | ## Product Details - **Brand:** PIVOTRAX - **Item Diameter:** 16 Inches - **Material:** Rubber - **Valve Type:** Schrader - **Wheel Size:** 16 Inches ## Images ![2.25/2.50-16 (70/90-16) Heavy Duty Inner Tube – 2mm Butyl Rubber, TR4 Straight Valve – Fits Mini Dirt Bikes, Pit Bikes, Motocross & Trail Bikes - Image 1](https://m.media-amazon.com/images/I/71kR+cbxnLL.jpg) ![2.25/2.50-16 (70/90-16) Heavy Duty Inner Tube – 2mm Butyl Rubber, TR4 Straight Valve – Fits Mini Dirt Bikes, Pit Bikes, Motocross & Trail Bikes - Image 2](https://m.media-amazon.com/images/I/81A+8OnPSBL.jpg) ![2.25/2.50-16 (70/90-16) Heavy Duty Inner Tube – 2mm Butyl Rubber, TR4 Straight Valve – Fits Mini Dirt Bikes, Pit Bikes, Motocross & Trail Bikes - Image 3](https://m.media-amazon.com/images/I/81NSV9PrM1L.jpg) ![2.25/2.50-16 (70/90-16) Heavy Duty Inner Tube – 2mm Butyl Rubber, TR4 Straight Valve – Fits Mini Dirt Bikes, Pit Bikes, Motocross & Trail Bikes - Image 4](https://m.media-amazon.com/images/I/81zRXjCRWgL.jpg) ![2.25/2.50-16 (70/90-16) Heavy Duty Inner Tube – 2mm Butyl Rubber, TR4 Straight Valve – Fits Mini Dirt Bikes, Pit Bikes, Motocross & Trail Bikes - Image 5](https://m.media-amazon.com/images/I/81tJI2dj4AL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by S***M on April 16, 2026* ### ⭐⭐⭐⭐⭐ Review *by M***. on April 5, 2026* ### ⭐⭐⭐⭐⭐ Review *by R***. on April 27, 2026* --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/474371940-2-25-2-50-16-70-90-16-heavy-duty](https://www.desertcart.hr/products/474371940-2-25-2-50-16-70-90-16-heavy-duty) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-13*