Product Description
Upgrade your ride with the THUNDERMAX CONTROLLER W/HARNESS from Knobtown Cycle, Kansas City’s motorcycle parts destination.
Key Features
- Allows a dual-filament bulb to be used in three ways: tail, brake and turn signal (excluding the need for a center brake light); includes ribbon cable for integrating generic indicator lights
- Performs all fuse, relay and signal-canceling functions in one simple package
- Weather-resistant connections for trouble-free use in extreme environments
- Trim-to-fit harnesses allow installation on most custom bikes
- Compact design makes it easy to hide on a custom motorcycle
Product Specifications
- Part Number: 21200675
- Brand: THUNDERMAX
- Weight: 2.45 lbs
Professional Installation Available
Buy online or visit our Kansas City showroom. Contact us for installation service options! Free Ship to Store!
Part Locations
| Location |
Available |
| Wisconsin (WI) |
0 |
| New York (NY) |
1 |
| Texas (TX) |
0 |
| Nevada (NV) |
4 |
| North Carolina (NC) |
0 |
| National Total |
5 |
Stock levels last updated: January 30, 2026 8:09 PM
Professional Installation Available
Knobtown Cycle offers professional installation services. Contact us via a service request to learn more.
Thank you for Shopping at Knobtown Cycle!
When you shop with us, you’re not just buying motorcycle parts — you’re supporting a small, family-run business rooted right here in the heartland of America. Every order helps us keep riders on the road and fuels our passion for serving the motorcycle community.
From all of us at Knobtown Cycle, thank you for choosing local and riding with us.
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