FRCOLOR 4pcs Heavy Duty Caster Wheels: Universal Replacement Rollers for Treadmills, Exercise Bikes & Home Gym Equipment

["EFFORTLESS MOBILITY: Move heavy treadmills and exercise bikes with ease. Our high-density rollers allow smooth gliding without strenuous lifting","UNIVERSAL COMPATIBILITY: Standard 4.5cm (1.77\") size fits most fitness equipment brands. Ideal DIY replacement for worn or broken OEM wheels","HEAVY DUTY DURABILITY: Crafted from premium PP & PA materials to support heavy weight without cracking. Built for long-term use in any home gym","SMOOTH & QUIET GLIDE: Precision-engineered surface reduces friction and noise while protecting your floors and mats from unsightly","VALUABLE 4-PIECE SET: Includes four heavy-duty casters to provide a complete wheel upgrade for your machines, ensuring a stable and efficient workout"]