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Roadmaster 10" Safety Cable Extensions - 1 Pair

Roadmaster 10" Safety Cable Extensions - 1 Pair

Item # RM-910648-10
Our Price: $54.43
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Shipping Weight: 0.98 lbs
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Extend the length of your towing system without having to buy new safety cables. Extensions add an extra 10" so you can use high-low receivers, hitch extensions, and other accessories. 1-636-306-4830 to order Roadmaster accessories and parts part number RM-910648-10 or order online at Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Roadmaster 10" Safety Cable Extensions - 1 Pair. Accessories and Parts reviews from real customers.
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  • Reviews (40)
  • Q & A (0)
  • Videos (1)
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  • Why etrailer?

Roadmaster Accessories and Parts - RM-910648-10

  • Tow Bar
  • Trailer Safety Chains
  • Safety Cable Parts
  • Loop Extensions
  • Roadmaster
  • 10 Inch Long
  • 8000 lbs GTW

Extend the length of your towing system without having to buy new safety cables. Extensions add an extra 10" so you can use high-low receivers, hitch extensions, and other accessories.


  • Extends safety cables for use with accessories that increase the length of your towing system
  • Includes cables and quick links
  • Made in the USA


  • Cable length: 10"
  • Quick link length: 3-1/4"
  • Capacity: 8,000 lbs


910648-10 Road Master 10" Safety Cable Extensions - 1 Pair

Video of Roadmaster 10" Safety Cable Extensions - 1 Pair

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

Video Transcript for Roadmaster Safety Chains and Cables RM-910648-10 Review

Today we're going to be taking a look at the Roadmaster 10" Safety Cable Extensions, these are going to extend the length of your towing system without having to buy new safety cables. The extensions are going to add an extra 10" so you can use Hi-Low Receivers Hitch Extensions and other accessories. It's going to come with both cables and 2 quick links. These are going to have a capacity of 8,000 pounds, the cables are a braided steel construction then they have the vinyl coating over the center area right here. The coating's going to help keep the cables from scratching any component of your towing setup and then the cable portion right here with the vinyl, that's going to have a diameter of around 3/8". The quick links, that's these right here, these are made from a steel construction with a zinc finish to resist rusting corrosion.

They do feature the threaded connected for easy connecting and disconnecting. That can be done by hand or you could use a wrench. This will accept a 5/8" wrench or a 15mm wrench. A few measurements that I want to give you real quick regarding the quick link, if we take a look at the overall length that's going to measure about 3 3/16", 3 1/4" right in that area. If we measure the overall width to the outer point there of the barrel, that's going to give us a measurement of about 1 9/16" or 1 5/8" right in that area. The opening that we have right here that's going to give a measurement of about 3/8".

I do want to point out that the diameter of the link right here is going to measure 3/8" but the threaded portion has a slightly larger diameter that's going to measure about 7/16" or a 1/2". Now we'll take a look at the internal dimensions, so the usable space that we have there on the inside, it's going to be about 2 1/2" inches measuring right below that barrel the usable width, it's going to be about 3/4" and then to the barrel on the flat side is going to be about 5/8". The units are really easy to use, the cables are a nice, strong design, strong connection points, vinyl coating, braided steel. A nice, strong, dependable unit and again from the inside edge of this loop to the same point on the other side, that's going to give the 10" extension or 10" length of each cable. That's going to do it for today's look at the Roadmaster 10" Safety Cable Extensions.

Customer Satisfaction Score:

Customer Reviews

Roadmaster 10" Safety Cable Extensions - 1 Pair - RM-910648-10

Average Customer Rating:  4.9 out of 5 stars   (40 Customer Reviews)

Extend the length of your towing system without having to buy new safety cables. Extensions add an extra 10" so you can use high-low receivers, hitch extensions, and other accessories.


I got these to install as part of my 2011volt hitch install. etrailer showed the use of right inch extensions, I went with the 10 inch to go over the top of my hitch to protect my bumper cover in the case of an emergency hitch ball failure.


I added a dual socket hitch and therefore needed extensions for my safety cables. Your extensions worked great and delivery was quick

Still very satisfied with the extensions The extensions still work well
William - 05/26/2017


These work great and kept me from having to do any modification to the tow chains on my camper. They are rated appropriately and have held up nicely to the environment. (I stow them under cover once I get to where I am going).


Safety chain extensions worked out fine for me. They allow me to use my long hitch, and this allows me to lower truck tailgate while the trailer is attached. I could not lower the tailgate the whole way without them.


My tear drop trailer hitch is real short, Got your 8” hitch extender and used my old hitch, 2” ball and now I can open my tail gate on my 150 ford the trailer weights 1000, lbs and has 350 tong at. Now it tows a lot better and can back up easier and my safety chains extenders Work perfectly, Thank and other good job, great part and thanks for caring about how your products work thanks !


Wanted to add cables from the removable arms to the frame mounted baseplate on my tow hitch. These were the right size. I added a clip to the other end. Just a little extra piece of mind


they are working fine


The Thule canoe rack is a no brainer, as with all of their products. Our canoe only weighs 15# so this keeps it very tight on the roof rack.


These extension cables should work very well for me. When I added a brake to my tow set-up, it made my original cables shorter. I only towed a few short trips before deciding to get extensions. Just have to wait for the season to start again.


Roadmaster makes good products

very satisfactory
george B - 07/16/2018


All the items I order arrived a day early. All were in excellent shape and fit my tow setup. The best part of dealing with etrailer is the personnel. They are the greatest. My customer service rep spent a great deal of time helping me to get the right items for what I needed. I will continue using etrailer for all my towing needs


These look to be well made and will work very well because my camper safety chains are too short to cross under the trailer tongue with my new larger truck.


Product works as described. Allows me to extend my tow safety chains.


Locks keyed alike and safety cable extensions were just what I needed, and shipped “way fast” too.


Excellent quality - worked as advertise d.


rust appeared quickl

Work well but rusted quickly
Ron N - 09/06/2018


Excellent quality fast shipping especially like the text alerts this is exactly what I was looking for


all I needed to complete my set up


Excellent service. Easy to order. Right part came. Minimal travel time. Would do business here again, no question.


Fast service and great selection. Extenssion cables are very substantial and work great!


Very easy to do business with


The cables are exactly what was ordered and needed.


There isn't too much I can say about two short cables, but they are perfect and do their job.


Perfect no problems love our product!


Chains were PERFECT length. a "10" !

Show More Reviews

See what our Experts say about this Roadmaster Accessories and Parts

  • Will 1/2" Outer Diameter Hook Work With Roadmaster 10" Safety Cable Extensions
    I confirmed with one of my contacts at Roadmaster and confirmed that the # RM-910648-10 will accept a 1/2" outer diameter hook. Because the quick link length of 3-1/4" will allow its connection. I have the measurements of this product attached.
    view full answer...
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  • Would 68 inch Coiled Safety Cables be too Short If they Stretch Out When Installed
    As long as the cables have enough slack built into them so that you can make tight turns without issue the cables you have would work just fine. If they get so tight that the attachment points look strained or the cable is totally straightened (since it's coiled) it would be too short. Otherwise we have an 80 inch Roadmaster coiled cable, part # RM-653.
    view full answer...
  • Comparing the Curt Tri-Ball Mount D900 and Buyers Products Tri-Ball Mount 3371802225
    The Buyers Products Adjustable Tri-Ball Hitch part # 3371802225 and the Curt Multi-Ball Adjustable Ball Mount part # D900 are both very similar. The main difference as you mentioned is that the Buyers Products Ball Mount has a longer shank which then allows for more rise/drop adjustments. The more rise/drop adjustments you have, the greater number of trailers you can tow level. In regards to the manufacturer, both Curt and Buyers Products are reputable brands so I would not let this alone...
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  • Safety Cable Extensions for Roadmaster Nighthawk Tow Bar When Adding a 4” High-Low Adapter
    Yes, the Roadmaster 10" Safety Cable Extensions # RM-910648-10 is perfect for making up the difference once you install the 4" Roadmaster High-Low Adapter # RM-048-4. This adapter ads 9-5/8" in length to the Roadmaster Nighthawk Tow Bar # RM-676 from your motorhome. Be sure to use the extensions on the motorhome side of the bars and not the side of the vehicle being flat towed.
    view full answer...
  • How to Pick Out Correct Rise/Drop High Low Adapter for Flat Towing Vehicle
    If you check out the picture I attached you can see that when picking out a high low adapter for a flat towing setup you need to have the tow bar sit within 3 inches of level to be "safe." Otherwise suspension and tire damage might occur. First thing you need to do is measure from the ground to the top of your hitch opening on your tow vehicle and then measure from the ground to the center of your base plate kit on your towed vehicle. The difference in these two figures is the amount...
    view full answer...
    Image 1 for Image 2 for
  • Parts Needed To Flat Tow a 2018 Jeep Wrangler JL Unlimited With a 2017 Holiday Rambler Vacationer
    First you will need the Roadmaster Direct-Connect Base Plate Kit # RM-521453-5 to install on the front of your 2018 Jeep Wrangler JL Unlimited. This will connect to the Roadmaster Nighthawk All Terrain, Non-Binding Tow Bar # RM-676 and attach to your 2017 Holiday Rambler Vacationer. The RoadMaster Nighthawk All Terrain Towing Combo Kit # RM-9284-2 will provide you with the wiring for your tail lights, locks, lube, tow bar cover, and storage bag. You will also need the Roadmaster Battery...
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  • Parts Needed to Flat Tow a 2013 Chevrolet Suburban
    I looked in the owners manual for your 2013 Chevrolet Suburban and it can be flat towed or dolly towed, depending on if it's 2 or 4 wheel drive, and if it has a single or two speed transfer case. If you suburban is 2wd or has a single speed transfer case, it can not be towed with all 4 wheels on the ground, and can not be towed with the front wheels on a dolly. So if your Suburban is 4wd with a 2 speed transfer case it can be flat towed (all wheels on the ground) or dolly towed. There...
    view full answer...
  • 2018 Jeep JL Wrangler Base Plate Options With Aftermarket Bumper and Winch
    The Roadmaster Crossbar-Style Base Plate Kit # RM-521424-4 is not confirmed to fit your 2018 Jeep JL Wrangler, it is for a different generation of Wranglers with the factory bumper in place. Most aftermarket bumpers have D-ring bumper mounts, and there are adapters to hook the tow bar directly to the bumper. However you will need to check with the manufacturer of the bumper to see if it is rated to tow with. If the Bumper you have is rated to tow and you have 3/4" d-ring mounts you can...
    view full answer...
  • Parts Needed For Flat Towing a 2020 Ford F-350 Super Duty
    Your 2020 Ford F-350 does not require a Battery Disconnect # RM-766 since the truck will not drain the battery while being flat towed. With the Demco Air Force One Supplemental Braking System # DM26VR you will want to use a Battery Charge Line Kit # RM-156-25 to prevent the battery from being drained by the braking system. I recommend using the Roadmaster Direct-Connect Base Plate Kit # RM28FR with their Roadmaster BlackHawk 2 All Terrain, Non-Binding Tow Bar # RM-422 for towing your...
    view full answer...
  • Recommended Parts to Flat Tow a 2020 Jeep Cherokee Trailhawk
    To tow your 2020 Jeep Cherokee Trailhawk behind a motorhome there are several components you need for a complete, safe set up. The first is a base plate, I recommend Roadmaster direct- connect base plate kit part # RM-521451-5. The base plate bolts to your Cherokee frame and provides the solid attachment point to hook up to. I have installed a variety of base plates on many different vehicles, and Roadmaster's direct-connect is my favorite. I think they install smoother, and have a really...
    view full answer...

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Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Laura H
Written by:
Laura H
Employee Cole B
Installed by:
Cole B
Employee Wilson B
Updated by:
Wilson B

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