Hope RX4+ SL Disc Brake Caliper - Front Flat Mount Direct +20mm DOT Type Blue CheckoutTitle=FOX 36 SL Air Spring Rebuild Kit - 2026 } Seatpost Lower Tube Assembly

} Seatpost Lower Tube Assembly - 30

Provide a great chainline on most Boost bikes

Model WCS Description Seat Mast 1-Bolt 8x8

Steel axles

Hope RX4+ SL Disc Brake Caliper - Front Flat Mount Direct +20mm DOT Type Blue CheckoutTitle=FOX 36 SL Air Spring Rebuild Kit - 2026 } Seatpost Lower Tube AssemblyThe Hope RX4+ DOT type brake caliper has been refreshed as the RX4+ SL. The RX4+ SL caliper retains a precision CNC machined monobloc design that results in a stiffer caliper to give unrivaled feel and modulation. In addition it now features a new bore cap that adopts the narrower design first introduced on the GR4 and TR4 to reduce overall caliper width and improve compatibility with a wider range of frames. It now also incorporates the bleed nipple