bing tracking image
  1. Accessories and Parts
  2. Rhino Rack
  3. Roof Rack
  4. Fit Kit
THIS ITEM IS NOT A FIT FOR
1990 Lexus LS 400
Rhino Rack

Rhino-Rack Backbone Mounting System for Pioneer Platform

Part Number: RRRJKB2
In Stock
$499.99
Accessories and Parts
Not Confirmed to Fit

1990 Lexus LS 400

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
By submitting this form, you understand and agree to our Terms of Sale, Website Terms of Use and Privacy Policy.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Need help with installation?
Locate installers near me
The Backbone adds support to your factory hard top so you can carry more gear on your roof rack. Provides mounting points for a Pioneer Platform or up to 2 Rhino-Rack Vortex Aero or Heavy-Duty crossbars. 1-800-940-8924 to order Rhino Rack accessories and parts part number RRRJKB2 or order online at etrailer.com. Free expert support on all Rhino Rack products. Great prices and Fastest Shipping for Rhino-Rack Backbone Mounting System for Pioneer Platform. Accessories and Parts reviews from real customers.
  • All Info
  • Reviews (62)
  • Q & A (0)
  • Photos

Rhino Rack Accessories and Parts - RRRJKB2

  • Roof Rack
  • Fit Kit
  • Rhino Rack

The Backbone adds support to your factory hard top so you can carry more gear on your roof rack. Provides mounting points for a Pioneer Platform or up to 2 Rhino-Rack Vortex Aero or Heavy-Duty crossbars.


Features:

  • Backbone system reinforces the structure of your factory hard top so you can carry more weight on your roof rack
    • Allows your hard top to bear a heavier load when compared with a roof rack mounted directly to the hard top
    • Won't interfere with removal of Freedom panels or hard top
  • Internal brackets install around window frames and bear weight from roof
  • 4 External platforms provide flat, stable mounting surfaces for a Pioneer Platform or up to 2 Rhino-Rack Vortex Aero or Heavy-Duty crossbars (sold separately)
    • 2 RLCP legs (RLT500 - sold separately) are required per crossbar
    • Adapter kit (RRVA-FK2 - sold separately) required for each Vortex Aero crossbar
    • Spacer kit (LHSPAIR - sold separately) required for each Heavy-Duty crossbar
  • Black powder coat finish complements vehicle
  • Mounting hardware included
    • Some drilling required
  • 5-Year limited warranty


RJKB2 Rhino-Rack Backbone Roof Rack Mounting System

Installation Details RRRJKB2 Installation instructionsAlternate Instructions RRRJKB2 Installation instructions



Ratings & Reviews

4.8

62 reviews
Review sort icon
The Backbone adds support to your factory hard top so you can carry more gear on your roof rack. Provides mounting points for a Pioneer Platform or up to 2 Rhino-Rack Vortex Aero or Heavy-Duty crossbars.

by:

Product was exactly what was expected with no damage or defects. E-trailer staff were very helpful and informative in regards to the status of the order.



by:

Always great products by RhinoRack and excellent service from eTrailer….!



by:

This is a pretty great platform. It has held up fine, doesn't leak, and wasn't too bad to install myself. It looks nice, and is there when I need it.



by:

I love how this rack system uses the existing holes in the roof for mounting. Exactly what I was looking for. It makes for a very clean look.



by:

Just as I had expected. Top quality and no rust. A bit scary drilling the holes in your top but all went well. Their anti theft allen screws could use an upgrade.



by:

Way better for camper shells than track s.



by:

This system is great. Have a 6’ rack mounted to it and it easily supports 200-300lbs of dynamic load a d 700+ static load without issue.



by:

Great product... I think the best roof rack option for a Jeep Wrangler.
It took me about three hours to install, by myself. Not a hard install. Just follow the instructions and, the etrailer installation video was very helpful also.



by:

I have used the Rhino Rack backbone system on a previous Jeep and it worked well. Installation instructions were clear. Definitely recommend.
Also a word about etrailer. I have ordered a few times from etrailer. These folks have great prices and have really fast shipping. They are quick to respond to questions and have great follow up after the sale (5 star).



by:

It’s the bomb. Great design. Well made.



by:

The backbone rails look great! However, the instructions need to be revised to include information that is Armada specific. Instructions for removal of factory rack is not included and not available anywhere I could find on the internet. It’s almost impossible to remove the end caps on the factory rack without destroying the tabs that hold them in place. Also, the middle connection point of the backbone has 2 bolts, the factory rack only has one. However, the second hole is there but you must remove the trim piece that sits below the factory rack. It’s simple to remove and reinstall without damaging the clips. In order to make the backbone rails fit, you have to cut an additional couple of inches from the existing window in the trim piece in order to expose the second hole underneath. This is pretty simple with the right saw but some additional instructions on this would be helpful. Overall, this is a great product, just need to make customers aware of the extra steps needed on the Armada vs the installation on the Nissan Patrol.



by:

Great quality and was easy to install as the directions were simple to follow.



by:

Nice and sturdy but was a PIA to install… prepare to give yourself a few hours to button this up securely on your roof.



by:

I find it cumbersome to work with for what I needed using various carriers. It looked like a versatile setup, but in practice, for my needs, it falls short.



by:

It is a good starting point to improve on the stock FJ rack. I have had several different setups mounted to the Backbone, but eventually found a used Pioneer Platform that works best. The whole system from Rhino Racks is overpriced for what it is.



by:

Best backbone I could find for a custom build. Flat lower profile more practical for my needs. Thanks guys!



by:

Excellent product. Be aware that you WILL have to cut into the gutter guard to install this. I used a Dremel with a grind wheel to cut a roughly 2" x 1.75" square to reveal the second bolt insert hole in the center mount.



by:

Delivered fast and it fits well. Took me 1.5 hrs to install but could be less.



by:

Backbone installed- waiting for feet to attach crossbars



by:

Best price on the part. Fast shipping. The install video made it a breeze. Rhino rack was a little lazy with the written directions and stamping all the parts. The etrailer video for 2015 JKU was needed.



by:

Platform racks are the best in the market I think. I'm removing my Platform rack from my 2007 Jeep Sahara JKU and installing it to my 2021 Rubicon JLU. That shows my love and devotion for this very durable and such a beauty to look at system. Had this rack on close to 5 years and still looks amazing. I'm not installing this rack anytime soon. Just wanted to make sure I have the Backbone system for my new JLU when the time comes. Pic of my red JKU with rack attached. Hopefully I can update with my black JLU pics later.



by:

It’s a good product. The only install issue I ran into is the drill bit I used (dewalt) for the front two holes on the hard top wasn’t long enough to work with the included drill stop and I ended up scratching the paint on the roll bars. I installed mine over the top of a carpet headliner with dynamat underneath. I did a “soft install” of the roof rack (used regular nuts instead of nylock, low torque, and no sealant), removed it, then put in the mat and headliner, then finished the roof rack install. Multiple cross country trips with my pioneer platform and no issues with excessive noise and no water leaks.



by:

Excellent product, very well engineered. ETrailer is great with shipping time and communication as always. The instructions aren't perfect and its much easier for me to follow a video. Both RhinoRack and another site have great install videos. Took me a couple hours just taking my time and being careful. I had to loosen the hard top to access the front spacer install but otherwise its very simple just follow the directions carefully when drilling thru your hard top. Measure twice cut once mindset.
The only negative was my package had been ripped open some and one of the parts had protruded and gotten scuffed up a bit. The powdercoating is pretty durable because it cleaned up well and is not noticeable really where installed. The price is also iffy. Its very well engineered and works really well, but for what it is from a material input cost... seems about 20% to high.



by:



by:

This product is excellent but the instruction have a lot to be desired


25
25

See what our Experts say about this Rhino Rack Accessories and Parts

  • Can I Attach 2 Thule Hullavators to My Pioneer Platform on My 2016 Jeep Wrangler?
    I have a solution for you. on your two-door 2016 Jeep Wrangler, you cannot attach a Thule Hullavator # TH898 directly to a Rhino-Rack Backbone Mounting System like the # RRRJKB2. Also, if you have a Rhino-Rack Pioneer Platform like the # RR33QX, there is no way to securely attach a Hullavator to the platform. The best route forward if you have a Pioneer Platform is to use the Accessory Bars # RR43138B to attach to your platform and use a kayak carrier like the Rhino-Rack 2 Kayak Carrier...
    view full answer...
  • Which Rhino Rack Pioneer Platform Fits 2018 Jeep Wrangler Unlimited JK
    Since you have the 2018 Jeep Wrangler Unlimited that is a 4 door you would need a different Backbone kit of # RRRJKB1 which comes with the Pioneer Platform part # RR68FM that fits your Wrangler. You are correct the part # RRRJKB2 does only fit the 2 door models.
    view full answer...
  • Parts Needed to Install the Rhino-Rack Pioneer Platform Rack on a 2012 Jeep Wrangler
    If you have a two door 2012 Jeep Wrangler then in order to install Rhino-Rack Pioneer Platform Rack you will need part # RR42111BF, part # RRRJKB2, and part # RRRLCP39. If you have a four door 2012 Jeep Wrangler then in order to install Rhino-Rack Pioneer Platform Rack you will need part # RR42108BF, part # RRRJKB1, and part # RRRLCP38. The largest platform rack you can install on a two door is 52" long x 56" wide and the largest platform rack you can install on a four door is 72" long...
    view full answer...
  • 2015 Jeep Wrangler Roof Rack with Rhino Rack Vortex RLT600 for Rhino-Rack 2 Kayak Carrier
    The Rhino-Rack Quick Mount Legs for Vortex Aero Crossbars - RTC and RT Roof Rack Tracks - Qty 4 # RRRLT600 are designed to fit the tracks like # RTC16. Another popular option is to use the backbone roof mounting system for Jeep Wrangler hard tops # RRRJKB2 and rubber bases # RRQMFK06. Then you will simply use crossbars like the 59 inch # RRVA150B-2 to complete the roof rack. This complete system will allow you to use most roof accessories like the 2 Kayak Carrier # S512 and RRS512X....
    view full answer...
  • Roof Rack For 2-Door 2016 Jeep Wrangler With 3-Piece Hard Top
    So there are two options for a roof rack for your 2016 Jeep Wrangler with a 3-piece hard top, and both are going to involve drilling into your roof so it will be a permanent application. One is from Rhino-Rack and the other from Yakima, with the difference being the Backbone support system from the Rhino-Rack being sturdier overall than the Yakima's simple footpads. So I'd go with the Rhino-Rack, but either system will work, and here are the needed parts for you: Yakima - Yakima JetStream...
    view full answer...
  • Recommended BackBone Mounting System for a 2012 Jeep Wrangler
    There is a backbone system for the 2012 Jeep Wrangler Rubicon. It is the Rhino-Rack Backbone Mounting System item # RRRJKB2 for the 2-door models or item # RRRJKB1 for 4-door. If you want to attach crossbars you will need the following parts: Rhino-Rack Vortex Aero Crossbars - Aluminum - Black - 59" Long - Qty 2 item # RRVA150B-2 Rhino-Rack Quick Mount Legs for Vortex Aero Crossbars - Qty 4 item # RRRLT600 Rubber Bases for Rhino-Rack RRRLT600 Quick Mount Legs - Qty 4 item # RRQMFK06
    view full answer...
  • Do You Have Any Yakima Roof Tracks Available to Fir my Yakima Roof Rack?
    I have an alternate solution to the shipping time problem. I looked at the other sizes of Yakima rail systems, and they all will have about the same shipping time as the Yakima 54" Tracks for Roof Racks # RRRTV148 that you ordered. With that being said, another solution is to purchase the Rhino-Rack RT-Style Roof Rack Tracks - Rivet Mount - 58" Long - Qty 2 # RRRTV148. However, this track is not compatible with your Yakima setup. If you choose to go this route, here is what you will need:...
    view full answer...
  • Rhino Rack Roof Rack that Fits 2017 Jeep Wrangler Unlimited
    If you'd be willing to drill into the hardtop of your Wrangler Unlimited there's no reason you couldn't install the Rhino Rack roof rack for camper shells part # Y01-120B. The tracks are 63 inches long so you'd want to make sure you'd have space for them on your roof. We also have Rhino Rack roof racks that fit your 2017 Jeep Wrangler Unlimited with the part numbers # RRVA150B-2, # RRRLT600, # RRRJKB2, # RRQMFK06 which attaches to the rain gutters and doesn't require modification of the...
    view full answer...
  • Which Rhino Rack Roof Rack Parts are Needed to Install on 2007 Jeep Wrangler
    The correct parts you need to install a Rhino Rack Aero Vortex roof rack on your 2007 Jeep Wrangler are part numbers # RRVA150B-2, # RRRLT600, # RRRJKB2, and # RRQMFK06 and you'd be set.
    view full answer...
  • Recommended Roof Rack for a 2018 Jeep Sahara JK Wrangler Unlimited
    I have a great solution for you but the Yakima roof rack system for your 2018 Jeep Sahara JK Wrangler Unlimited is not capable of hauling kayaks. Instead you will want to use the 2018 Jeep JK Wrangler Roof Rack by Rhino Rack which includes the following parts: Rhino-Rack Vortex Aero Crossbars - Aluminum - Black - 59" Long - Qty 2 item # RRVA150B-2 Rhino-Rack Quick Mount Legs for Vortex Aero Crossbars - RTC and RT Roof Rack Tracks - Qty 4 item # RRRLT600 Rhino-Rack Backbone Roof Rack...
    view full answer...
  • Roof Rack for 2015 Jeep Wrangler Sport 2 Door that Uses Backbone System
    If you wanted to do a roof rack with crossbars that utilizes the Rhino Rack backbone system you'd need the part numbers # RRVA150B-2, # RRRLT600, # RRRJKB2, and # RRQMFK06 or if you wanted a platform style tray rack you'd want the part number # RR33QX.
    view full answer...


Info for this part was:

Employee Tyler C
Edited by:
Tyler C
Employee Jameson C
Expert Research:
Jameson C
Employee Wilson B
Updated by:
Wilson B
Employee Alex H
Updated by:
Alex H
Employee Michael B
Updated by:
Michael B
Employee Daron K
Written by:
Daron K

At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time.