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The REESE Pro Round Bar weight distribution system is engineered to provide more features and superior ride performance to other systems. Designed to evenly distribute weight and reduce trailer sway.
| BRAND: | REESE |
| PART NUMBER: | 49913 |
| WARRANTY: | LIMITED LIFETIME WARRANTY |
| WEIGHT: | 104 LBS |
| CAPACITY: | 11,500 LBS. |
| GROSS TONGUE WEIGHT: | 1,150 LBS. |
| INCLUDES SWAY CONTROL: | YES |
| UNIVERSAL OR SPECIFIC FIT: | UNIVERSAL |
| BALL DIAMETER: | 2.313 IN. |
| LENGTH: | 35 IN. |
| SAFETY CHAINS INCLUDED: | NO |
| MATERIAL: | STEEL |
| MOUNTING HARDWARE INCLUDED: | YES |
| ADJUSTABLE ARMS: | YES |
| MOUNTING BRACKET POSITION: | 24.5 IN. TO 27.5 IN. |
| COLOR: | BLACK |
| BOLT GRADE: | Grade 5 & Grade 8 |
Reese has designed towing equipment since 1952 and remains a benchmark for heavy-duty towing. The line covers fifth wheel hitches such as the modular M5, gooseneck couplers including the Goose Box, air-ride and short-bed pin boxes, weight distribution systems with active sway control, and the accessories that connect them, all built to exceed published industry standards.
Reese has been pioneering towing performance since 1952, when Margaret Reese asked her husband TJ to stop travel trailers rocking every time somebody walked through them. His answer, the first pair of stabilising jacks, was simple and effective enough to change the RV industry. From that starting point Reese grew into a designer and manufacturer of complete towing systems, and today it anchors the heavy-duty end of the Horizon Global towing portfolio.
Fifth wheel towing is where the brand's engineering is most visible. The M5 fifth wheel hitch uses a modular design that breaks into manageable sections for assembly, with a wider stance, tighter tolerances and a shock absorption system aimed at the jolts that travel up through a truck bed. For owners who would rather tow from a gooseneck coupler and keep the bed clear, the Goose Box 20K replaces the trailer's king pin with a gooseneck connection carrying its own air-ride cushioning.
Pin boxes are a Reese speciality. The 5th Airborne uses air-ride technology to dampen road shock and reduce the chucking motion that makes fifth wheel towing tiring, while the Sidewinder was designed for short-bed pickups, pivoting the connection point so the trailer can turn sharply without the front cap meeting the cab.
For conventional towing, Reese weight distribution systems restore load to the tow vehicle's front axle and control sway. The Pro Round Bar distributes weight evenly while damping sway, and the Pro Dual Cam II uses active cam-based sway control that works harder the stronger the sway force becomes. Complete kits pair bars, head and shank to a rated tongue weight, and dedicated sway control kits can be added to existing setups. The products suit RV owners, horse and livestock haulers and anyone towing near the upper end of a vehicle's rating.
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Installation: REESE® Pro Weight Distribution System
The Round Bar Pro is a weight distributing hitch system manufactured by Horizon Global. It uses spring bars to distribute trailer tongue weight across the towing vehicle's frame, reducing stress on the rear axle and improving stability. The system is available in three models: 49911 (6,000 lb max trailer weight), 49912 (8,000 lb), and 49913 (11,500 lb).
The Round Bar Pro works on trailer frames 1.5" to 2" wide and 4" to 7" tall, with either top or bottom mount couplers.
No, not directly. If your trailer has a straight tongue instead of an A-frame tongue, you will need to use a pole tongue adapter. This adapter attaches to the trailer tongue and provides a place to attach the snap-up brackets.
Yes. Some surge brakes will not work with weight distributing hitches. You must check your trailer and surge brake operating instructions for any special requirements regarding weight distributing hitches. Do not use sway control with surge brakes.
All three models (49911, 49912, 49913) have a maximum tongue weight rating of 500 lbs for the weight carrying ball mount. The weight distributing mode supports higher tongue weights: 600 lbs for model 49911, 800 lbs for 49912, and 1,150 lbs for 49913.
Model 49911 supports a maximum gross trailer weight of 6,000 lbs in weight distributing mode. Model 49912 supports 8,000 lbs. Model 49913 supports 11,500 lbs. All models are limited to 5,000 lbs in weight carrying ball mount mode. Never exceed the lower of the towing vehicle manufacturer's rating or trailer rating.
Weigh your loaded trailer tongue using the provided Consumer Information. Choose a system with a tongue rating at or above the actual trailer tongue weight. The tongue rating of the hitch must meet or exceed the measured tongue weight. Also ensure the total trailer gross weight rating never exceeds your towing vehicle's rated gross tow rating.
Yes. Line up the towing vehicle and trailer on level pavement in a straight-ahead position, uncoupled. Level the trailer and measure the distance from the ground to the top of the coupler. Record this measurement—it is used to set the correct ball height, which should be approximately 3/4" to 1" higher than the coupler height to compensate for vehicle squat.
Yes. Unless otherwise specified, make sure you adjust the ball mount and do the trailer setup with the trailer and vehicle loaded as they will be when towing. The towing vehicle and trailer should be loaded and ready for travel before final leveling.
Check your vehicle owner's manual for specific guidance. Air springs, air shocks, and automatic leveling systems may affect how the hitch should be set up.
You will need wrenches in sizes 7/8", 3/4", and 1-1/8", and a torque wrench capable of reading 260 ft-lbs. A trailer jack is also required to raise and lower the trailer during spring bar installation.
Insert the hitch bar into the hitch box and install a pull pin and spring clip. The hitch bar may be used in either the up or down position.
With the ball attached to the ball mount, slide the ball mount up or down the hitch bar until the nearest ball height dimension is obtained and the holes line up with the hitch bar. Insert the bolt in the bottom hole first to rest the hitch head.
Apply grease to the ball mount ends of the spring bars. The spring bars can be inserted into either side of the ball mount (there is no 'right' or 'left' bar). To insert and lock the spring bar in the socket, hold the bar under the socket and push up. The spring bar will automatically be locked into position by the spring bar locking device. Check that the bar is locked by moving it up and down at the frame bracket end.
To remove spring bars, swing the bar around under the bumper and it will drop free.
The rivet and 7 spacer washers are supplied to gain the correct downward angle of the spring bars. Each washer lowers the bracket end of the spring bar approximately 1.5". For an initial fitment, try 4 spacer washers for top-mounted couplers and 3 spacer washers for bottom-mounted couplers. Use the least amount of washers necessary to establish the correct angle.
Orient the L-bracket so that the bottom portion is approximately 3" above the unloaded spring bar. Secure the L-bracket to the outer frame bracket using 2 bolts and lock washers. Bolts should be spaced with either 1 or 2 open holes between them (do not put both bolts directly next to each other). Do not use the threaded hole that the other bolt has used.
Position the inner and outer frame brackets 27.5" from the center of the trailer coupler. Note that brackets can be positioned up to 3" towards the truck from nominal to clear objects on the frame, but this may interfere with mounting for a friction sway bar.
Extend the trailer jack until the spring bar ends are above the L-brackets. Adding a 6" x 6" block or support under the jack will make extension and raising the trailer faster and protect the jack from being extended to maximum travel. Swing the spring bars onto the L-brackets as close to the trailer frame as possible. Secure the spring bars by dropping in covers, then secure the covers using the pins as shown in the manual.
Tighten the 3/4" top bolt to 260 ft-lbs torque once the head angle is set.
Secure the lower bolt to 260 ft-lbs torque.
Torque both frame bracket bolts to 130 ft-lbs.
Torque the L-bracket bolts to 80 ft-lbs.
Before tightening the bolts, lock (tighten) the ball mount set screw. After the first day of towing, check the ball mount set screw for tightness.
Retract the jack and re-measure the front wheel well reference point. The front wheel well height should be equal to or lower than the original measurement. If the front wheel well height is higher than originally measured, increase the load on the spring bars by either raising the L-bracket position or adding spacer washers. If the front wheel well is lower than originally measured, reduce the load by lowering the L-bracket position or removing spacer washers, then recheck the wheel well measurement. If the original wheel well height is not achievable, it is preferred that the wheel well height is lower after the spring bars are loaded.
Loaded ball height should not be greater than uncoupled ball height. Front wheel overload and loss of rear wheel traction can result, leading to unstable handling, reduced braking ability, and a tendency to 'jackknife' when turning and braking at the same time. If loaded ball height is greater than uncoupled height, reduce take-up on spring bars and re-measure until proper height is obtained.
No. Do not attempt to tow any type of trailer behind another trailer. Towing multiple trailers may cause severe instability, loss of control and/or structural failure, and may result in vehicle accident, property damage and personal injury. Towing multiple trailers is illegal in many jurisdictions.
No. Do not attempt to hook up or tow with rear wheels of a front-wheel-drive towing vehicle removed. Severe structural damage to the towing vehicle, hitch, and trailer may result. A towing vehicle/trailer combination cannot be controlled adequately unless the towing vehicle's rear wheels are carrying their share of the load.
No. Trailers should not be occupied while being towed, under any circumstances.
Use heavy lubrication such as fiber type wheel bearing grease on the hitch ball and on the spring bars. Lubrication is recommended every day. Keep the hitch painted to prevent rust and check tightness of bolts regularly. Clean out old grease; do not let it harden inside the ball mount.
At the beginning of every towing day: clean the ball and coupler socket and coat the ball lightly with grease; check spring bar brackets and spring bars for wear; check that all bolts are properly tightened and the hitch pin and clip are securely in place; check that electrical hookups are in working order and that safety chains are connected.
Keep sockets in the head assembly free of dirt and well lubricated. Excessive wear in this area may indicate overload or inadequate lubrication. Keep the head assembly exterior clean, especially the spring bar sockets. Do not allow dirt or stones to lodge between the spring bar and head. Keep the hitch painted to prevent rust and maintain a good appearance. Do not paint over labels.
If any part of your towing system bottoms out, or if you suspect damage may have occurred in any other way, pull over and make a thorough inspection. Correct any problems before resuming travel.
Tongue weight should be about 10-15 percent of the gross trailer weight for most trailers. Too low a percentage of tongue weight will often produce a tendency to sway. Excess weight on the tongue can also lead to sway and damage the hitch and/or towing vehicle.
Yes. Always hook up trailer lights, turn signals, electric brakes and break-away switch connection (if equipped) even for short trips.
Yes. Remove the hitch from the towing vehicle receiver when not towing to prevent contamination of head sockets, reduce the chance of striking the hitch on driveway ramps or other objects, and minimize damage in the event of a rear-end collision.
A sway control system can help minimize the effects of sudden maneuvers, wind gusts, and buffeting caused by other vehicles. Use of a sway control is recommended for trailers with large surface areas, such as travel trailers. An optional Reese friction sway bar #83660 can be added to the Round Bar Pro for additional sway control.
It is recommended that you use the trailer jack to raise and lower the trailer for application and removal of spring bars. If there is an issue, the lifting handle included can be used to pry spring bars onto the L-brackets or off again. Caution should be used that the spring bars do not hit people or property. Stand clear of the lift bar and spring bars. Do not use the lifting handle for any other use.
The kit includes: 1 ball mount, 1 hitch bar, 1 hitch bar pull pin, 1 hitch bar pull pin spring clip, 2 spring bars, 2 ¾-10x4.5" hex bolts, 2 ¾" serrated washers, 2 ¾-10 lock nuts, 7 spacer washers, 1 ball mount adjustment rivet, 2 spring bar L brackets, 4 5/8-11x3.5" hex bolts, 2 5/8-11 lock nuts, 2 inner frame brackets, 2 outer frame brackets, 6 5/8" lock washers, 4 5/8-11x1.5" hex bolts, 2 spring bar covers, 2 cover clips, and 1 lifting handle.
The Round Bar Pro fits trailers with frames 1.5" to 2" wide and 4" to 7" tall, with top or bottom mount couplers. Verify your trailer frame dimensions and coupler type before purchasing.
Yes. The Round Bar Pro includes the ball mount but not the hitch ball itself. You must purchase a hitch ball separately with a rating equal to or exceeding your trailer's GVWR.
You will need wrenches (7/8", 3/4", 1-1/8"), a torque wrench capable of reading 260 ft-lbs, and a trailer jack to raise and lower the trailer during installation.
The manual does not describe drilling as part of the installation process. The frame brackets are positioned and bolted to the trailer frame using existing or provided holes.
Ball mount bolts: 260 ft-lbs. Frame bracket bolts: 130 ft-lbs. L-bracket bolts: 80 ft-lbs. Use a torque wrench capable of reading 260 ft-lbs.
Check the ball mount set screw for tightness after the first day of towing. At the beginning of every towing day, clean the ball and coupler, check spring bars for wear, verify all bolts are tight, and confirm the hitch pin and clip are secure.
Ensure the loaded ball height is not greater than the uncoupled ball height. If it is, reduce the spring bar load and re-measure. This prevents front wheel overload and loss of rear wheel traction, which can cause jackknifing.
Increase the load on the spring bars by either raising the L-bracket position or adding spacer washers. Then retract the jack and re-measure the front wheel well. Repeat until the front wheel well height is equal to or lower than the original measurement.
Reduce the load on the spring bars by either lowering the L-bracket position or removing spacer washers. Then retract the jack and re-measure the front wheel well. If the original wheel well height is not achievable, it is preferred that the wheel well height is lower after the spring bars are loaded.
To insert and lock the spring bar in the socket, hold the bar under the socket and push up firmly. The spring bar will automatically be locked into position by the spring bar locking device. Check that the bar is locked by moving it up and down at the frame bracket end. If it moves freely, it is not locked; try pushing up again with more force.
Excessive wear in the hitch head assembly sockets may indicate overload or inadequate lubrication. Check that you are not exceeding the hitch's weight rating and ensure you are lubricating the sockets regularly with heavy fiber type wheel bearing grease.
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Ann
Ordered online. Shipment arrived on time and with all the correct parts. Great customer service and friendly staff. Also, pricing was great!
May 22, 2023
