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Blue Ox Adjustable Mud Flap System w/Rock Screen - 2" Hitches - Matte Black
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Blue Ox

Blue Ox Adjustable Mud Flap System w/Rock Screen - 2" Hitches - Matte Black

Part Number: BLU49UR
15 Reviews | 7 Questions
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$474.53
Retail:$621.00
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blue ox mud flaps universal fit rear pair
blue ox mud flaps universal fit 24 inch wide
blue ox mud flaps no-drill install 24 inch wide blu49ur
blue ox mud flaps rear pair no-drill install
blue ox mud flaps rear pair 24 inch wide blu49ur
blue ox mud flaps universal fit rear pair adjustable flap system w/rock screen - 2 inch hitches matte black
blue ox mud flaps universal fit no-drill install blu49ur
blue ox mud flaps universal fit 24 inch wide adjustable flap system w/rock screen - 2 hitches matte black
blue ox mud flaps universal fit no-drill install adjustable flap system w/rock screen - 2 inch hitches matte black
blue ox mud flaps no-drill install 24 inch wide blu49ur
blue ox mud flaps rear pair 24 inch wide blu49ur
blue ox mud flaps universal fit 24 inch wide

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Blue Ox Adjustable Mud Flap System w/Rock Screen - 2" Hitches - Matte Black customer photo
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Protect your truck and towables from flying rocks and debris with these fully adjustable mud flaps. The heavy-duty rubber flaps slide onto your ball mount or tow bar, and they adjust horizontally and vertically for a custom fit on your vehicle. Fastest Shipping and Great prices for Blue Ox Adjustable Mud Flap System w/Rock Screen - 2" Hitches - Matte Black. Read our customer reviews of Blue Ox mud flaps. Call 1-800-940-8924 for expert service or order your mud flaps part number BLU49UR by Blue Ox online at etrailer.com.
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Blue Ox Mud Flaps - BLU49UR

  • Rear Pair
  • 24 Inch Wide
  • Universal Fit
  • Rubber
  • Blue Ox
  • Hitch Mount
  • Single
  • No-Drill Install

Protect your truck and towables from flying rocks and debris with these fully adjustable mud flaps. The heavy-duty rubber flaps slide onto your ball mount or tow bar, and they adjust horizontally and vertically for a custom fit on your vehicle.


Features:

  • Protects your truck and towables from damage inflicted by flying rocks and debris
    • Works great when you're towing a boat; snowmobile; ATV; or 5th-wheel, travel or horse trailer
    • Mounts near the bumper yet far enough away from the rear wheels to provide a wide range of protection
    • Guards against backsplash - channels on the back direct water flow downward
  • Customizable to your vehicle's specifications for a perfect fit and maximum coverage
    • Pre-molded cut lines let you trim the mud flaps to any length
      • Includes punch tool to create bolt holes in mud flaps for attaching installation clamps
    • Vertical adjustment enables you to maintain consistent ground clearance no matter your load
      • Just loosen 2 bolts and rotate arms up or down, then re-tighten bolts to lock arms into place
    • Horizontal adjustment of support rods allows the mud flaps to fit the width of most trucks
  • Maintains the factory appearance of your vehicle
  • Use them when you're towing - take them off when you're not
  • Installs and removes easily - no drilling or welding required
  • Slide the center hub onto the shank of your 2" ball mount or tow bar (sold separately) and tighten it with set screws
  • Durable construction of all components ensures years of service and performance
    • Heavy-duty, 3/8" thick black rubber mud flaps with molded, tear-resistant fabric layer
    • Heavy-gauge, stainless-steel-sleeved support rods with corrosion-resistant coating inside
    • Black powder coated aluminum clamps and stainless steel hardware attach mud flaps to support rods
    • UV-protected, black matte powder coat finish on forged aluminum center hub and arms
  • Includes polished, stainless steel trim plates with "Blue Ox" logo
  • Included rock screen helps prevent damage from stones, gravel, and debris while traveling


Specs:

  • Application: most SUVs, vans, RVs, full-size or dually trucks with a 2" x 2" trailer hitch receiver and ball mount
  • Adjustable width (outside to outside): 67-1/4" to 96-3/4"
  • Mud flap dimensions (each): 24-1/4" long x 23-7/8" wide x 3/8" thick
    • Length can be modified to create a custom fit
  • 1-Year limited warranty


Note: To use the Blue Ox adjustable mud flap system there must be at least 1" of clearance between the back of the ball mount face and the trailer hitch receiver opening.



BX88420 Blue Ox Mudflap System for 2" Receiver - Rock Screen

Installation Details BLU49UR Installation instructions





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Customer Satisfaction Score:

Ratings & Reviews

4.7

15 reviews
5 Stars
(13)
4 Stars
(1)
3 Stars
(0)
2 Stars
(1)
1 Star
(0)
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Protect your truck and towables from flying rocks and debris with these fully adjustable mud flaps. The heavy-duty rubber flaps slide onto your ball mount or tow bar, and they adjust horizontally and vertically for a custom fit on your vehicle.

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Center mess tore on first trip



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This rock guard provides a great safety coverage for anything tow.



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Everything appears to be good quality. Would like to see a heat shield however so far I’m very happy with the product.



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Love dealing with etrailer.
The blue ox rock guard is well built and easy to put together.

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The Blue Ox mud Flap System w/Rock Screen went together fairly easy and the directions were straight forward to fallow the assembly. It looks good on my Ford F350 Super Duty. The system will work good to protect my 5th Wheel Trailer.

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Thank you everything is there will install next week



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Top notch flaps, glad I got these.A little tough for me to cut and install but got er done.



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Installation was a little bit difficult, but I had great and prompt help at the other end of an email. Won’t get that on Amazon. I highly recommend etrailer. I’ve used them many times. I haven’t actually been on the road yet, but it looks like it will work fine. Might update later.

Nick S. profile picture

Nick S.

9/22/2025

I am glad we were able to help you out during that installation! We are always here to answer any questions. You'll have to come back and let me know how it goes on the road.



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Buying from E-Trailer was a great decision. Very pleased with my purchase.



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Great quality kit and excellent instructions. Only place where I needed to deviate from instructions was I needed to drill the mounting holes in the flaps larger than the punch in the kit made them in order to get the bolts through them and lined up with the holes in the flap clamps. I am waiting to install the rock screen until I have verified that I have the mud flaps adjusted to the final width. Will post another picture when it is installed.

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Brooke M. profile picture
Etrailer Expert

Brooke M.

3/3/2025

Please do send that last picture when you have it. Id love to see! The install so far looks great :)


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See what our Experts say about this Blue Ox Mud Flaps

  • Will the 2" Blue Ox Adjustable Mud Flap System w/Rock Screen Work w/a Rear Exhaust Motorhome?
    Hey Greg. The Blue Ox Adjustable Mud Flap System w/Rock Screen item # BLU49UR can indeed be used on motorhomes with rear exhaust so long as you install the Heat Shield for Blue Ox Mud Flaps item # BLU29UR and the exhaust pipe is at least an inch back. It's going to attach to the high/low adapter in your picture. So long as you don't have the long extended chrome tailpipe and you can keep the Heat Shield for Blue Ox Mud Flaps item # BLU29UR at least an 1" away from the exhaust tip you'll...
    view full answer...
  • Best Rock Guard for a Demco Kar Kaddy
    Hey Catherine. The easiest way to add a rock guard is to mount one directly to your Demco Kar Kaddy, you'll want the Sentry Deflector for Demco Kar Kaddy Tow Dollies item # DM5950. This deflector mounts directly to your Kar Kaddy's tongue with included u-bolts. It's made of high density plastic mounted at a 30 degree angle to deflect rocks and debris back down to the roadway. For a traditional mud flap style of protector, that mounts directly to your RV, I recommend the Blue Ox Adjustable...
    view full answer...
  • Will the Blue Ox Adjustable Mud Flap System Work w/a Tow Bar?
    It sure will Gail and welcome back! The Blue Ox Adjustable Mud Flap System w/Rock Screen item # BLU49UR will definitely work with a Roadmaster Nighthawk tow bar like item # RM-676. It'll attach directly to the Nighthawk's shank and do a great job of protecting your Wrangler from rocks and other debris your Winnebago's dual wheels kicks up. Do you use a high low adapter or does your Nighthawk tow bar connect directly to your Winnebago's 2" receiver. I ask because the Mud Flap System w/Rock...
    view full answer...
  • Can You Adjust The Height Of The Blue Ox Adjustable Mud Flap System BLU49UR?
    Hey David, thanks for reaching out. No, Blue Ox does not offer a longer mud flap replacement that goes with the Adjustable Mud Flap System # BLU49UR. That said, the mud flaps are adjustable, so if you need them to drop down farther, you can loosen the 2 bolts and rotate the arms down. That should allow them to drop down far enough to use with your 2500HD. What are you towing behind your 2500HD?
    view full answer...
  • Will Blue Ox Adjustable Mud Flap System Work with Blue Ox Weight Distribution
    Hey Bill, yes the Blue Ox Adjustable Mud Flap System part # BLU49UR can fit on the shank of a Blue Ox weight distribution system as long as for sure your hitch is the 2 inch hitch size. The part # BLU69UR that you referenced is the 2-1/2 inch hitch size.
    view full answer...
  • Will The Blue Ox Adjustable Mud Flap System BLU69UR Fit A Nexus Motorhome?
    Hi Chuck! While the Blue Ox Adjustable Mud Flap System w/Rock Screen - 2-1/2" Hitches - Matte Black # BLU69UR is typically installed on trucks, there is absolutely no reason you couldn't install it on your Nexus motorhome. However, I will say there are not many 2-1/2" hitches on motorhomes so double check that, just to be sure. If its a 2" hitch, you will want the 2" hitch version # BLU49UR. Are you looking at this to protect a vehicle being flat towed?
    view full answer...
  • Will Shocker Hitch Air 2-Ball Mount Work With Rock Tamers/Blue Ox Receiver Mounted Mud Flap
    Hey Michael, welcome back! The design of the Shocker Hitch HD # SHK45VR does not allow for compatibility with your # BLU49UR or Rock Tamers that mount on the receiver. The two parts will interfere with each other and there won't be enough clearance. Have you looked at Gen-Y? You could use the Gen-Y Torsion 2-Ball Mount w/ Stacked Receivers # 325-GH-1024. This will be similar to the shocker hitch and won't interfere with the mud flaps. It is designed for trailers with a tongue weight of...
    view full answer...


Info for this part was:

Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Daron K
Edited by:
Daron K
Employee Jonathan Y
Video by:
Jonathan Y
Employee Ethan H
Video by:
Ethan H
Employee Aidan B
Installed by:
Aidan B
Employee Lincoln B
Written by:
Lincoln B
Employee Daniel M
Test Fit:
Daniel M

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