Elevn Post Mount Adapter Kit 120mm – 10mm Axle W/O Cover Bolts

Overview

The Elevn Post Mount Adapter Kit is a comprehensive disc brake mounting system engineered for Chase BMX frames with 10mm rear axles. This kit provides everything needed to install post-mount mechanical or hydraulic disc brakes, including a CNC-machined aluminum adapter, 120mm ISO-mount rotor, chain tensioner, spacers, and mounting hardware.

Key Features

• Multi-Frame Compatibility — Designed for Chase RSP 5.0 and 4.0, Element (2020–2025), and Edge (2022–2025) frames; may fit other frame brands but optimized for Chase geometry
• 10mm Axle Design — Engineered for frames with 10mm rear axle spacing; maintains proper brake caliper alignment and consistent modulation
• Post-Mount Standard — Compatible with all standard post-mount mechanical and hydraulic disc brake calipers; allows flexibility in brake system selection
• Full CNC Machined Aluminum Adapter — Precision-machined 6061-T6 aluminum ensures consistent bore diameter and caliper support; improves rotational smoothness and component longevity
• 120mm ISO-Mount Rotor System — ISO 6-bolt fastening system with integrated air vents included; ready-to-install without additional purchases
• Integrated Chain Tensioner — Anti-rotation chain tensioner system prevents chain slippage and maintains consistent tension; eliminates separate tensioner purchase
• Pin Bolt Security — Secure pin-style mounting prevents adapter movement and ensures stable brake geometry under load
• Precision Spacer System — Includes 1mm and 0.5mm disc spacers plus two rotor spacers (thickness dependent on hub type); enables fine-tuning of rotor clearance and caliper alignment
• Complete Mounting Hardware — Six disc screws with washers and all necessary fasteners included for straightforward installation
• Center Lock Hub Compatible — Works with Center Lock hubs using Center Lock adapter (adapter purchased separately); expands compatibility options

Technical Specifications

• Mount type: Post-mount
• Axle size: 10mm
• Adapter material: CNC machined 6061-T6 aluminum
• Rotor diameter (included): 120mm
• Rotor mounting: ISO 6-bolt system with air vents
• Disc spacers: 1mm and 0.5mm thickness (one each)
• Rotor spacers: 2 included (quantity dependent on hub type)
• Chain tensioner: Integrated anti-rotation system
• Mounting system: Pin bolt security
• Disc screws: 6 screws with washers included
• Brake compatibility: Post-mount mechanical and hydraulic calipers only
• Frame compatibility: Chase RSP 5.0 and 4.0, Element (2020–2025), Edge (2022–2025)
• Brake system: Not included (caliper purchased separately)

Compatibility & Ideal Use Cases

Compatible with Chase RSP 5.0 and 4.0, Element (2020–2025), and Edge (2022–2025) frames with 10mm rear axles. May fit other frame brands but engineered specifically for Chase frame geometry. Requires a separate post-mount disc brake caliper (mechanical or hydraulic); brake system not included in kit. The integrated chain tensioner eliminates need for separate tensioner purchase, simplifying overall build. Works with standard ISO-mount hubs; Center Lock hub compatibility requires separate Center Lock adapter (sold separately). Ideal for Chase frame owners upgrading from coaster brakes or adding disc braking capability. The included 120mm rotor, tensioner, and comprehensive spacer system provide immediate installation capability for complete disc brake functionality. Essential component for riders prioritizing post-mount disc braking on compatible Chase frames. Not suitable for frame models or axle sizes outside the specified compatibility list. Purchase of a compatible post-mount disc brake caliper is required for complete system functionality.