Alcon CRR300 Two-Piston Rear Caliper – Pair

Alcon CRR300 2-Pot Caliper – Motorsport Rear Applications

The Alcon CRR300 is a lightweight, high-performance 2-piston rear caliper designed specifically for competitive motorsport. Ideal for applications such as rally rear, single seater, saloon car rear, and hill climb, this caliper combines compact design with impressive stopping power.

Available in two piston configurations – 28.6mm or 34.9mm – the CRR300 allows for tuning to suit different brake balance and pedal feel requirements. Its radial mount design offers maximum rigidity and a consistent brake pedal under high loads.

With features like internally ported fluid transfer, anti-knock back springs, and fast-change pad retention, the CRR300 is engineered for performance, reliability, and ease of use in demanding race environments.

Key Features:

• Designed for motorsport rear use – Rally, Hill Climb, Saloon, Single Seater

• 2-piston monobloc caliper – available with 28.6mm or 34.9mm pistons

• Radial mounting – for maximum stiffness and consistent pedal feel

• Aluminium pistons standard – stainless steel pistons optional for better heat resistance

• Anti-knock back springs – 2kg rated for pad stability

• Hard stainless wear plates – prevent pad damage to the caliper

• Pad retaining wire – for quick pad swaps

• Internally ported design – no external fluid lines

• Common leading/trailing setup – by switching the bleed screw and inlet

Technical Specs:

• Disc diameter compatibility: 250–300mm

• Disc thickness compatibility: 8–10mm (9.6–10.0mm for 28.6mm and 34.9mm pistons)

• Fluid inlet: 3/8-24 UNF (-3)

• Dry weight: 0.97kg (excluding pads)

• Pad reference: Alcon 3451/42 (49.2cm²) or 3451/47 (56.0cm²), 14mm thick, 63.4mm long