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Replacement Roadmaster Coiled Breakaway Cable for Flat Tow Brake Systems

Replacement Roadmaster Coiled Breakaway Cable for Flat Tow Brake Systems

Item # RM-8603
Our Price: $18.82
Accessories and Parts

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Shipping Weight: 0.19 lbs
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Replace the coiled breakaway cable of your supplemental braking system. 1-800-940-8924 to order Roadmaster accessories and parts part number RM-8603 or order online at Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Replacement Roadmaster Coiled Breakaway Cable for Flat Tow Brake Systems. Accessories and Parts reviews from real customers.
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  • Reviews (146)
  • Q & A (0)
  • Videos (1)
  • Photos

Roadmaster Accessories and Parts - RM-8603

  • Tow Bar Braking Systems
  • Cables
  • Roadmaster

Replace the coiled breakaway cable of your supplemental braking system.


  • Replaces the coiled breakaway cable of your flat tow braking system
    • Can also be used with trailer breakaway and other dead-man switches
  • Keeps cable up off the road with coiled design
    • Allows slack for cornering
    • Extends to 8'
  • Works with virtually any supplemental braking system
  • Limited lifetime warranty

8603 Replacement Road Master Break Away Cable for Supplemental Braking Systems

Video of Replacement Roadmaster Coiled Breakaway Cable for Flat Tow Brake Systems

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Review of Roadmaster Tow Bar Braking Systems - RM-8603

Jeff: Hello everybody, this is Jeff Today, we're going to take a look at this Roadmaster coiled cable for the Even Brake braking system. Now this is for use with an emergency breakaway system. This part is included with the Even Brake braking system. This can be used on trailer breakaway switches and other dead man switches. You can see it has a nice coil design.

Keeps the cable off the road, allows slack for cornering.Now this does extend to about eight feet and it will retract for storage. You notice on each end it has the carabiners, two of them total for attaching to one end to the breakaway switch, the other to the tow vehicle. But that should do it for the review on the Roadmaster coiled cable for the Even Brake braking system.

Customer Satisfaction Score:

Customer Reviews

Replacement Roadmaster Coiled Breakaway Cable for Flat Tow Brake Systems - RM-8603

Average Customer Rating:  4.8 out of 5 stars   (146 Customer Reviews)

Replace the coiled breakaway cable of your supplemental braking system.


Still holding up well, outside all the time on trailer under a roof. Has just the right amount of slack.



Still working well, has not failed yet.


Very easy to navigate the web site. Great delivery times.


exactly what I needed.Order delivered q uickly.


Used this to replace the stranded breakaway cable on my fifth wheel I was always concerned the stranded cable would become tangled in something while towing. This coiled cable stays up off the floor and in-line with the breakaway control.


My experience with etrailer was good from the perspective of the cooperation and pleasantness. However, even though I was clear on the tow bar I had (Blue Ox) and the vehicle I was towing (2005 Dodge Dakota) when the tow package came and the shop I had installing it got to the end of the installation, it was discovered that the wrong pins were sent, i.e. they wouldn't lock in place - too short . At first we couldn't determine what the problem was, so I called etrailer back. Was told those were the correct pins. Finally called Blue Ox directly and the rep immediately told me (after I gave him the PN) that those were the wrong pins. Without me asking he offered and did send two replacement pins free of charge. They worked perfectly.


Customer service and timeliness of delivery were tremendous. It would help if the carabiner clips were a little bit bigger and more durable. The people at etrailer are amongst the best!


critical to have when towing especially when having to make sharp turns the coiled cable allows you that ability without locking down the brakes.

Kevin T.


Red plastic covering has faded some, works great


I have three trailers that I use them on. Makes the hook up look cleaner.


I'm extremely happy with this product so far! The stock takeaway cable was so long it drug on the ground and frayed it in half, so this was its replacement! Upon installation I had to lightly trim the plastic on the plunger that goes into the brakeaway cable box for the caribeaner to fit inside, but after 2 minutes with my pocket knife the caribeaner fit perfectly inside! I towed my pop up around town to air up the tires and get propane and I didn't have any issues with the new cable, but the true test is this weekend when I tow the pop up 2.5/3 hours away from home. I am very confident that this brakeaway cable will last and perform how it's supposed to! I'm a very happy customer!


Exactly what we ordered, thank you!


I bought this cable to replace the cheesy OEM breakaway cable on my trailer. This one has plenty of uncoiled length that I won't worry about it pulling out when turning, but the coiled length is short enough to keep it from sagging and dragging. The included clips are very small, so I replaced them with some larger ones I had lying around the house so they'd fit what I'm clipping them onto.


I have been very happy with the service and response from etrailer and staff. I highly recommend etrailer for RV and other merchandise. The items I have ordered are always of good quality.



It works fine. Thank you.


Carabiner ends are too small to connect on my RV and too small to handle easily on the car end, but can simply be replaced with medium-sized carabiners.


I ordered this cable as a backup for my current cable on my Roadmaster Supplemental Braking System. It was exactly what I was looking for and came quickly.


Excellent products, shipped as promised and arrived on time. I have installed all the products. Although it took me longer then a professional installer, I had little to no issues. The online installation videos for all the parts (which were attached to the online order status sheet) made it extremely easy to install. The videos were of a professional actually installing the equipment step by step. has a customer for life.


Product was easy to install and appears to have weathered the elements. I cannot comment on how it has worked since it is an emergency brake cable, which (thankfully) I have not needed to use.


ETrailer was very easy to deal with. Their website showed an error in the shipping costs, an an eTrailer representative personally called me to explain what occurred, and to get my authorization for the correction. I appreciated the personal touch. The product arrived, and works as advertised. I will definitely deal with them again.


High quality. Robust metal cable inside with vinyl coating. Strong little caribeners. I trust my camper with this brake cable.


Order was easy to make and delivered in a timely manner. This company is on my speed dial !


Fast response and delivery


All the products I order from etrailer I like. That is why I ordered them. But what I really like is the service ethic of etrailer. An occasionally, when my order is confusing or a question about my address, I get a phone call. A PHONE CALL. Can be on Sunday evening or Saturday morning or during the week. What a service.


Appears to be made well. I was expecting it to be a little longer; however it does the job.


Makes hooking up easier. Would buy again


Well worth the cost. Better then a hanging emergency brake switch cable.


The end of a long frustrating search for a part that I needed before I could flat-tow again. I will start any future search for parts at this website. Very satisfied.

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Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Adele M
Updated by:
Adele M
Employee Amanda K
Updated by:
Amanda K

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