RCR 72v Support
My RCR 72v Battery Won't Charge
This guide explains what it means when your RCR 72v Battery will not accept a charge. Common Symptoms You may notice: Bike powers on only when plugged into the charger Display shows ~83.8V (full charge) After unplugging, the bike stays on for ~15 ...
ONYX RCR 45Ah Battery Fitment & Installation Guide
This guide walks you through installing the ONYX 45Ah 72V battery into your RCR, including connector compatibility and frame-specific fitment steps. Before You Begin (Important) This guide applies to riders installing the ONYX 45Ah 72V battery into ...
RCR 72V Controller Guide
Controller Overview The RCR 72V uses a Kelly KLS series controller. All wiring diagrams, configuration parameters, and error code definitions are handled through Kelly’s official documentation and software. This article provides an overview of the ...
The ONYX 72v RCR Whisperer— John Angel
If you’ve owned, researched, or seriously ridden an ONYX RCR—especially a 72V—there’s a very good chance you’ve come across John Angel. Known throughout the NYC e-bike scene as “the ONYX RCR whisperer” and often referred to as the godfather of NYC ...
RCR 72v 41Ah & 45Ah BMS Info / Connection Guide
This guide walks you through identifying your battery, connecting to the correct BMS app, and checking battery health. Step 1: Identify Your Battery Before connecting, confirm which battery you have. 41Ah Battery Requires the Xiaoxiang BMS app ...
RCR 72v 45ah Battery Upgrade
This guide walks you through installing the ONYX 72v 45ah battery into your RCR, including connector compatibility and frame-specific fitment steps. Before You Begin (Important) Purchase the RCR 72v 45ah Battery If we're out of stock, check out our ...
Popular Articles
RCR 80V Complete Start-Up Guide
This guide walks you through everything you need to get your RCR 80V ready to ride, from unboxing to unlocking Off-Road power modes. Follow the sections in order for the smoothest first experience. 1) Assembly Guide Video: This step covers getting ...
RCR Battery Best Practices Guide
Following these battery best practices will help maximize performance, extend battery lifespan, and reduce the risk of long-term issues with your RCR battery. General Battery Care Guidelines Lithium batteries perform best when they are not kept at ...
RCR 72v & 80v Horn Troubleshooting Guide
This guide covers the most common cause of a non-working horn an the 72v and 80v RCR: a loose or disconnected horn connector at the horn itself. The stock horn shown in the photo is the same style used on both the 72V and 80V models. What you’ll ...
RCR 80V Error Codes Guide
This article explains the most common error codes you may see on the RCR 80V display and how to resolve them step by step. Error Code 19 – Battery Connection Issue What it means Error code 19 indicates that the battery is not making a solid ...
RCR 80V Charging Troubleshooting Guide
This guide consolidates all common ONYX RCR 80V charger issues into one step-by-step reference, covering charging failures, overheating, fan issues, display problems, and safe servicing. Follow the sections in order to diagnose and resolve most ...