Hope RX4+ SL FM Caliper

Slimline four-piston braking with improved frame clearance and cleaner bleeding.

• ●Narrower bore cap design improves frame compatibility
• ●RX2-derived bleed nipple makes bleeding simpler and cleaner
• ●Lightweight four-piston monobloc caliper
• ●Separate DOT and mineral oil compatible versions
• ●Designed for 140, 160 and 180mm rotors
• ●CNC-machined 2014 T6 aluminium in seven colours

Narrower design for improved frame clearance

The 2026 RX4+ SL adopts the narrower bore cap design introduced on the GR4 and TR4. This reduces overall caliper width to improve compatibility with a wider range of frames.

Simpler, cleaner bleeding

The updated caliper uses the bleed nipple design from the RX2 to make bleeding easier and cleaner. A specific bleed syringe is available separately, and pads fit through the top of the caliper.

Stiff, lightweight four-piston construction

The slimline four-piston caliper is CNC-machined from 2014 T6 aluminium. Its monobloc construction increases stiffness to reduce vague lever feel and brake pad rub.

Versions for different drop-bar brake systems

Separate mineral oil and DOT versions cater for the listed Shimano, Campagnolo and SRAM drop-bar brake systems. The caliper is designed for 140, 160 and 180mm rotors and is compatible with Hope Flat Mount X, Y and Z brackets.