BSB USA hubcentric wheel spacers are proudly made in America from USA-sourced 6061-T6 billet aluminum that is CNC-machined to exact tolerances for smooth, vibration free performance. These 3/8" Inch 8x170 wheel spacers feature a 124.9mm hub bore, designed specifically for vehicles that use these specifications and is compatible with Ford F-250 F-350 1999-2021. They provide additional clearance for brake components, suspension parts, and wider wheel and tire setups while maintaining safe, hubcenmtric alignment. Each spacer includes pre-installed high-strength steel wheel studs, a durable black anodized finish, and all necessary hardware.Built, inspected, and packaged by BSB USA after more than 15 years of industry experience, these spacers deliver American made precision with no shortcuts.