# Polaris 3900 Sport Single Side Wheel — Part # 39-401 ## Key Benefits + Pool Cleaner Drive Fitment - Genuine Polaris single side wheel replacement for the Polaris 3900 Sport pressure-side pool cleaner - Also commonly listed for the Polaris P39 pressure-side pool cleaner - Part number 39-401 helps customers match the correct cleaner wheel - Supports the cleaner’s all-wheel Posidrive system for proper movement and traction - Helps restore cleaner mobility when the original side wheel is cracked, worn, warped, or damaged - Works with the compatible Polaris WideTrax tire when servicing wheel traction components - Helps the cleaner maintain smoother movement across the pool floor and walls - Useful replacement part when repairing Polaris 3900 Sport drive and wheel issues ## Quick Product Summary The Polaris 3900 Sport Single Side Wheel, part number 39-401, is a genuine Polaris replacement wheel for compatible Polaris pressure-side pool cleaners. This wheel is used on the Polaris 3900 Sport and is also commonly listed for the Polaris P39 cleaner. It supports the cleaner’s all-wheel Posidrive drive system and helps maintain proper traction, rotation, and pool coverage when the original wheel is worn or damaged. Use this part when your cleaner wheel is cracked, loose, broken, or no longer supporting smooth cleaner movement. ## Best For - Polaris 3900 Sport pressure-side pool cleaners - Polaris P39 pressure-side pool cleaners, when verified by parts diagram - Replacing a cracked, damaged, or worn single side wheel - Restoring cleaner wheel rotation and movement - Cleaner drive system repairs - Pool owners matching Polaris part number 39-401 ## Why This Matters - A damaged wheel can affect cleaner movement and pool coverage - Poor wheel rotation may cause the cleaner to stall, drag, or move inconsistently - A worn wheel can reduce the performance of the WideTrax tire - Matching the correct Polaris part number helps avoid wrong-part orders - Replacing a damaged wheel can help restore cleaner function without replacing the entire cleaner - Wheel issues should be checked along with tires, bearings, chain, drive parts, and wheel RPM ## Common Signs You Need This / Use This When - Use this part when the Polaris 3900 Sport side wheel is cracked, broken, warped, or missing - Use this replacement when the cleaner wheel no longer spins properly - Common signs may include poor traction, slipping, dragging, stalling, or uneven cleaner movement - Replace the wheel when the tire will not stay seated correctly due to wheel wear or damage - Use this part when your cleaner parts diagram calls for Polaris 39-401 - Inspect the WideTrax tire and related drive parts at the same time for complete cleaner repair ## Product Specifications Specification Details Brand Polaris Product Name 3900 Sport Single Side Wheel Part Number / SKU 39-401 UPC / Barcode 73891906769 Product Type Pool cleaner replacement wheel Cleaner Type Pressure-side pool cleaner Compatible Cleaner Model Polaris 3900 Sport Additional Common Fitment Polaris P39, when verified by parts diagram Drive System Application All-wheel Posidrive system Tire Compatibility Compatible Polaris WideTrax tire, when matched by cleaner model Application Cleaner wheel replacement and drive-system repair Use Restores wheel support, cleaner movement, and traction performance OEM / Genuine Status Genuine Polaris OEM replacement part Category Pool Cleaners & Chemicals in Pool & Spa Accessories ## Compatibility / Fitment Notes The Polaris 39-401 Single Side Wheel is designed for the Polaris 3900 Sport pressure-side pool cleaner. Public Polaris parts listings also commonly identify part 39-401 as fitting Polaris 3900 Sport and P39 cleaners. This wheel is part of the cleaner’s drive and traction system. Pool Warehouse describes the Polaris 3900 as using an all-wheel Posidrive system, with the side wheel acting as a key component in that drive system. Before ordering, confirm your cleaner model, wheel position, tire style, and parts diagram. Do not assume this wheel fits Polaris 180, 280, 360, 380, Quattro, robotic cleaners, suction-side cleaners, or other Polaris models unless your official parts diagram specifically calls for part number 39-401. ## Installation / Use Notes Turn off the booster pump and pool equipment before removing the cleaner from the pool. Remove the damaged wheel and compare it to the replacement Polaris 39-401 wheel before installation. When replacing the wheel, inspect the WideTrax tire, bearings, chain, drive shaft, chain tensioner, and related drive components. If the cleaner still slips, stalls, or moves unevenly after replacing the wheel, check water pressure, wheel RPM, feed hose condition, backup valve function, and other worn cleaner parts. ## Buy with Confidence Benchmark Pool Supply helps pool owners and service professionals identify the correct Polaris replacement parts by part number, cleaner model, and repair need. Cleaner wheels can look similar, but model fitment, tire style, and drive-system compatibility matter. Matching Polaris 39-401 to the correct 3900 Sport or P39 cleaner helps avoid wrong-part orders and keeps your pressure-side cleaner moving properly. ## Details - **Price:** 49.95 USD - **Vendor:** Polaris - **Type:** Pool Cleaner Parts - **Tags:** 999 ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 49.95 USD | In stock | ## Images - Polaris 3900 Sport Single Side Wheel — Part # 39-401 --- > Source: [Benchmark Pool Supply](https://benchmarkpoolsupply.com/products/polaris-3900-sport-single-side-wheel-part-39-401) > Updated: 2026-06-24