--- product_id: 109142520 title: "Spring Loaded Chain Tensioner,2 Stroke Motorized Bicycle Chain Guide" brand: "sthus" price: "$U965" currency: UYU in_stock: true category: "Sthus" url: https://www.desertcart.uy/products/109142520-spring-loaded-chain-tensioner-2-stroke-motorized-bicycle-chain-guide store_origin: UY region: Uruguay --- # Durable corrosion-resistant alloy steel Fits 49cc-80cc 2-stroke engines Adjustable tension & easy install Spring Loaded Chain Tensioner,2 Stroke Motorized Bicycle Chain Guide **Brand:** sthus **Price:** $U965 **Availability:** ✅ In Stock ## Summary > 🚴‍♂️ Keep your ride smooth and unstoppable with precision chain tension! ## Quick Answers - **What is this?** Spring Loaded Chain Tensioner,2 Stroke Motorized Bicycle Chain Guide by sthus - **How much does it cost?** $U965 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/109142520-spring-loaded-chain-tensioner-2-stroke-motorized-bicycle-chain-guide) ## Best For - sthus enthusiasts ## Why This Product - Trusted sthus brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **All-Inclusive Kit:** Comes complete with all screws and nuts—ready to upgrade your ride out of the box. - • **Unmatched Durability:** Crafted from thickened, corrosion-resistant alloy steel to withstand wear and prevent chain derailment. - • **Extend Chain & Sprocket Life:** Maintains optimal chain tension to prevent derailment and sprocket wear, saving you costly repairs. - • **Precision Fit for 2-Stroke Powerhouses:** Seamlessly compatible with 49cc, 66cc, and 80cc motorized bike engines for flawless chain control. - • **Effortless Installation & Custom Tension:** Wide mounting range and adjustable tension settings ensure a perfect, hassle-free fit every time. ## Overview The sthus Spring Loaded Chain Tensioner is a premium alloy steel guide designed for 49cc to 80cc 2-stroke motorized bicycles. It ensures optimal chain tension and alignment, preventing derailment and sprocket wear. Featuring adjustable tension settings and easy installation with included hardware, this durable tensioner extends chain life and enhances ride reliability. ## Description Buy sthus Spring Loaded Chain Tensioner,2 Stroke Motorized Bicycle Chain Guide | Adjustable guide wheel in black. Fits 49cc, 66cc, 80cc 2-stroke engines for motorized push bikes: Chain & Sprocket Kits - desertcart.com ✓ FREE DELIVERY possible on eligible purchases ## Features - Fitment:For 49cc, 66cc, and 80cc 2 Stroke Engine Motorized Bike - High quality：Chain roller tensioner ensures proper tension and alignment of the chain. It can prevent the chain from derailing, excessive wear of the sprocket and prolong the life of the chain. If the chain is not properly tensioned, it will be lost or broken. Eventually the side cover and stator plate will be damaged. - Premium Durability: Constructed with thickened metal and corrosion-resistant materials to prevent bending, wear, and chain derailment, ensuring long-lasting performance. - Easy Installation & Adjustment: Wide range of mounting holes and adjustable tension settings for a perfect fit on your bike. Includes all necessary screws, nuts. - Package Include: 1 x Chain Tensioner Kit ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07NXX4PV4 | | Best Sellers Rank | #22,109 in Automotive ( See Top 100 in Automotive ) #1 in Powersports Chain & Sprocket Kits | | Brand Name | sthus | | Customer Reviews | 4.2 4.2 out of 5 stars (2,576) | | Item Highlight | Adjustable guide wheel in black. Fits 49cc, 66cc, 80cc 2-stroke engines for motorized push bikes | | Item Weight | 300 g | | Manufacturer | sthus | | Material Type | Alloy Steel | | Model | AMWZ_MZ0052-1 | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | AMWZ_MZ0052-1 | | Recommended Uses For Product | Ensuring proper chain tension in 49cc, 66cc, and 80cc motorized bikes | | Strand Type | Single | | Unit Count | 1 Count | ## Product Details - **Brand:** sthus - **Material:** Alloy Steel - **Number of Items:** 1 - **Recommended Uses For Product:** Ensuring proper chain tension in 49cc, 66cc, and 80cc motorized bikes - **Strand Type:** Single ## Images ![Spring Loaded Chain Tensioner,2 Stroke Motorized Bicycle Chain Guide - Image 1](https://m.media-amazon.com/images/I/616OeX7TnCL.jpg) ## Questions & Answers **Q: Will this work on a go cart?** A: Depending on the length of the chain an if it will mount to the 2 stroke engine **Q: Replacement wheels come in 8mm&10mm which size do i need for the black Sthus tensioner?** A: That's an odd question. The standard chain for a bike motor kit is #415 which is 7/16" wide or a little more than 11mm; neither of those sizes would work. If it is a replacement wheel then I would propose measuring the one you have to determine how big it is. If the wheel is actually a sprocket then 8mm would work with conventional #415 chain as the inner spacing between the outer bone links of the chain is 8mm. **Q: Can you use the stock chain guard, that comes with the motor, with this tensioner?** A: The stock chain guard and this tensioner can coexist on your bike without issue. **Q: Can these chain tensioners be used to tighten drive belts? I am converting to belt drive .** A: Yes, the pulley is 1" wide, so as long as the belt is not wider than an inch it will work. ## Frequently Bought Together - sthus Black Spring Loaded Chain Tensioner For 49cc 66cc 80cc Engine Motorized Bike 2 Stroke Engine - JRL 32mm-40mm Black Offset Intake Manifold and Gasket for 49cc 66cc 80cc Motorized Bike Motorised Bicycle (Black) - IMAYCC Bike Motor Kit 80cc Motorized Bike Kit 2 Stroke Bicycle Engine Kit with Wired Digital Computer Fit for 26-28" Bikes --- ## 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.uy/products/109142520-spring-loaded-chain-tensioner-2-stroke-motorized-bicycle-chain-guide](https://www.desertcart.uy/products/109142520-spring-loaded-chain-tensioner-2-stroke-motorized-bicycle-chain-guide) --- *Product available on Desertcart Uruguay* *Store origin: UY* *Last updated: 2026-09-20*