Fits 1/10 scale nitro RC vehicles from HSP, HPI, Redcat, Volcano S30, Hobao, Kyosho, and HongNor Key benefits - Broad compatibility: Designed for a wide range of popular 1/10 scale nitro models, making it a versatile replacement or spare starter for your RC fleet. - Reliable starting maintenance: Proper usage with wax extends the life of the pull line, reducing premature breaks and improving starting reliability. - Exact fit for mounting and bearings: Center-to-center mounting hole distance is 27 mm, and it is built to work with 12 mm flat freewheel bearings with a 6 mm shaft diameter. - Clear sizing caution: Not all 16–21 nitro engines will accept this pull starter. Check your engine size before purchase to ensure proper fit. What you get and how it solves common problems - Compatibility with major brands and models reduces the need to search for brand-specific parts when replacing a worn or broken pull starter. - The wax application guidance helps users maximize the lifespan of the pull line, addressing frequent wear and breakage from regular use. - A clearly specified mounting and bearing interface (27 mm center-to-center, 12 mm flat freewheel bearings with 6 mm shaft) minimizes guesswork during installation and confirms proper fit with compatible components. - The size note helps you avoid buying a part that won’t fit your engine, saving time and money on returns or exchanges. Important attributes - Function: Pull start accessory for starting nitro engines on 1/10 scale RC cars. - Compatibility: 1/10 scale vehicles from HSP, HPI, Redcat, Volcano S30, Hobao, Kyosho, and HongNor. - Size and fit: Center-to-center mounting hole distance 27 mm; designed for 12 mm flat freewheel bearings with 6 mm shaft diameter. - Maintenance tip: Gentle pulling of the starting line plus a small amount of wax for extended line life. 2-3 practical use scenarios - Spare part for common 1/10 nitro models: Keep this pull starter on hand for quick replacement when your current starter wears or breaks, minimizing downtime during a session. - Field setup for multiple brands: If you operate several compatible brands, this unit offers a universal-fit option to simplify on-site maintenance. - Engine break-in or tuning sessions: Use the wax-treated pull line to reduce line wear during frequent starting attempts, helping you maintain consistent starts throughout a tuning session. Notes - The pull starter is not suitable for all 16–21 nitro engines. Please verify the actual engine size of your car before purchasing to ensure proper compatibility.