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EXT REA MX Shock For Sur-Ron Ultra Bee

$1,400.00

2-Year Warranty

on all components

Expert Support

for our customers

FREE Shipping

continental US only

Upgrade your Sur-Ron Ultra Bee’s rear suspension with the premium EXT REA MX Shock to customize your riding experience. The EXT REA MX Shock is a direct, bolt-on replacement designed for the Sur-Ron Ultra Bee electric motorbike for easy installation. No hardware required. Select spring size and primary use for your specific riding type (see chart below). The REA MX Shock is pre-tuned by EXT-USA based on your selections.

Choosing The Right EXT REA MX Spring Size

The general chart below provides a starting point at roughly 30% sag based on rider weight. However, choosing the right spring size depends primarily on your riding type and terrain. Therefore, you can select a spring size above or below for firmer or softer preference. For example, if you perform large jumps, have an extended swing arm, or just want a stiffer rear suspension, then increase one size heavier.

General Spring Size Guide
Rider Weight Spring Size
Up to 150 lbs 450
160-190 lbs 500
190-230 lbs 550
230+ lbs 600

Warning: For maximum weight limit for the Sur-Ron Ultra Bee, please refer to their manufacturers guidance.

EXT REA MX Shock Features

  • Durable 40mm damper body and 16mm Shaft
  • 4-way Adjustability: LSC-HSC-LSR-HBC (Hydraulic Bottom-Out Control) with wide range of adjustable tuning for all riding types
  • Adjustable HBC Technology allows for use of softer main spring rate and provides progressive damping support through the last 15% of stroke
  • High Flow: high flow main piston and high-turbulent flow for progressive dampening and mid-stroke support
  • Low Friction: ultra low-friction coating and low-friction seal
  • Engineered rebound circuit to separate bump and rebound oil flow
  • Very low reservoir pressure for maximum sensitivity and low cavitation
  • Very low hysteresis for high dynamic response
  • Secondary bottom out bumper to support end stroke events in addition to HBC technology
  • Low-profile rebound knob for easy spring swap
  • EXT Superlight V2 Spring: 450, 500, 550, 600
  • Easy Installation: directly mounts without additional hardware and includes specific motorsport spherical bearing mounting hardware

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