4 Quick Reasons on Why Shackle Suspension Is Better On Box Trailers
Many people do not know that there are different types of suspension on the market. The two main types of suspension used on your common Box Trailers are Shackle Suspension and Slipper Suspension.
So what’s the difference between the two? Why is one better than the other? How do I know if a trailer I am looking at has Shackle or Slipper Springs? If you have just started researching trailers or you are in the last stages of making your decision about which trailer you are going to buy. Here is 5 main points of difference between the two and why we choose Shackle over Slipper. Let’s take a look at each one.
First, let’s take a look at the two different types of springs.
Shackle Springs (Eye to Eye)
What are they?
- Eye to eye (shackle) springs. The traditional leaf spring, these have both ends coiled in an ‘eye’ into which a bush is placed. The front of the spring is held in a ‘hanger’ while the rear swings on shackle bolts and plates around a rear hanger.
They’re common in a multi-axle configuration, since the load can be transferred when one axle is carrying more of the weight (such as crossing kerbs) so that it’s more evenly spread.
What are they?
- Slipper springs. Simple and long wearing, slipper springs have an eye on one end, while at the other end the open leaves form a ‘tail’ that slides in a hanger welded to the trailer chassis. They’re a low-cost solution to multi-axle trailer suspension as they can be joined sequentially or attached as individual sets, but these do not transfer the load between axles and have a lower load rating.
Now that we know the difference of the two let’s get to the 5 quick tips on why Shackle Suspension is better than Slipper.
Shackle Suspension is quieter on the road:
Shackle suspension use nylon bushes in the Eyes of the spring to allow a greaseable bolt to be used when mounting. This allows grease to be applied which reduces friction and wear to a certain extent. This bush becomes the cushion between the bolt and metal spring which minimises any hard banging of steel on steel when you’re carrying your load.
These nylon bushes will need to be maintained and serviced, but a well maintained trailer will last for many more years then not.
Shackle Springs assist the driver whilst carrying heavy loads:
The driver when towing any trailer is a very important factor when towing heavy loads! Shackle Springs do four main things:
- Resiliently support vehicle, protect driver and load from damage by road shock
- Resiliently control brake and torque applications
- Transfer load share between each other to ensure you and your load are safe
- Act as structural members to position axle, both lengthwise and crosswise, with regard to chassis frame
In easy terms the springs cushion brake and acceleration Torque Reactions.
3) Wear & Tear
Shackle Plates and Eye Bushes Save Your Chassis:
Yes, it may be cheaper to purchase a trailer with slipper springs, but…
if you think about the longevity of your box trailer, we are sure you will choose to replace Shackle Eye bushes and bolts. Rather than repairing the Steel on Steel wear and tear that a slipper spring can produce.
For example, when a Box Trailer is running Slipper Springs and has a load in it, that load compresses the springs and the ‘slipper’ part of the spring ends up constantly rubbing up hard against the chassis. Over long trips with heavy loads this causes the slipper spring and chassis rub together over long periods of time causing a lot of heat and friction in one small area. Eventually the spot where all of that constant friction has been. Will need to be repaired or replaced due to the friction of two metals rubbing together.
Shackle Suspension eliminates the Steel on Steel friction. By using the nylon eye bush and the small amount of movement that the Shackle Plates allow when a trailer is loaded.
4) Eliminate Springs Popping
Shackle Springs Will Not Dislocate
Shackle Springs eliminate the chance of a spring popping out of it location as it is attached to the chassis hanger by greaseable shackle bolts. This gives the Shackle Spring a ‘Positive Location’ to the Chassis and eliminates the spring from moving TOO much.
Slipper Springs on the other hand have the ability to float around in ‘No Mans Land’. They have no ‘Positive Location’ to the chassis. Yes they have a square locating hanger but they can move about freely. In some cases it is possible for the slipper springs to ‘Dislocate’ from its hanger!
If the trailer is hit from behind or reversed up a curb to fast. This jolt from behind will assist the Slipper spring to move too far forward and fall out of its locating hanger. Leaving you in a spot of bother.
Shackle Suspension Is The Pick:
Trailer Guys Box Trailers are designed for the Tradesman and the Weekend Warrior. Both our Heavy Duty and Light Weight Hot Dipped Galvanised Box Trailers are built with ‘Shackle Suspension’.
A lot of buyers get overwhelmed with the amount of information that can be found on box trailers and suspension on the internet. As long as you know what information is important to your wants and needs. You will be on track to understanding and purchasing your box trailer.
Have you ever thought about what suspension you should have on your trailer? Has this impacted on your purchase decision?
Making Trailer Sway Control & Prevention Easy
Have you have ever towed a box trailer or any trailer for that matter and experienced the delightful sensation of ‘Trailer Sway’?
First of all…. What is trailer sway??
Trailer sway is when the trailer begins to sway from side-to-side when towing it with your vehicle. Many factors can cause this un-delightful experience, these factors being wind, high speeds, to much load, incorrect weight dispurment, tyre pressures, tow ball or hitch loose, over correcting and poor trailer design.
Touching on a few of the most common factors that causes trailer sway:
- To much load or incorrect weight dispursment. Most trailers are not designed to have to much load/weight behind the rear of the axle, if a trailer has a significant weight behind the rear of the axle this will cause the trailer to tilt up leaving the weight on the towing vehicles tongue very light. If the towing vehicles tongue weight is less than 10% of the total weight of the trailer, this will naturally allow the trailer to start swaying.
- Tow ball or hitch loose. Always check that your tow ball on the towing vehicles tongue is tight and not loose, this can cause the trailer to have excessive movement when being towed or it could also cause the tow ball to loosen all the way and come off. This also has the same effect with the hitch on the trailer. Always check the tow ball and trailer hitch bolts.
- Wind. Many people don’t realise that on a windy day this can play havoc with anyone towing a trailer. Wind tends to get underneath the trailer and pushes it from side to side. On high windy days be sure to slow down to a speed that allows you to have more control of your trailer than the wind.
How to eliminate trailer sway from happening to you…
A few hints & tips on what & what not to do to get your trailer back under control:
- When driving always drive at a pace that is 1. within the speed limit 2. comfortable for the driver towing 3. is not to fast to cause the trailer to sway.
- Do not over correct your steering wheel. If you feel your trailer starting to sway, the first reaction is to grab the steering wheel and correct the direction that the trailer is swinging to. This is not the ideal way to gain trailer sway control, by over correcting the steering wheel you may cause the trailer to sway to the other side and in some instances cause the trailer to jack knife and cause an accident.
- SLOW DOWN is the safest and best was to get your trailer under control. Decrease the speed you are travelling at in order to gain control of the trailer you are towing.
Tow Safe & Have Fun
WARRANTY Terms & Conditions
- Warranty is applicable only for the original owner
- Prior approval by Trailer Guys must be sought before returning your trailer to Trailer Guys for any Claims
- Costs for any transportation will be at the customer’s expense
In the event of us accepting a warranty claim. We reserve the right to repair, replace or provide a full refund, less freight charges if applicable.
Trailer Guys warrants all trailer frames and fabricated steel components. To be free of structural or welding defects for a period of 12 months from the date of purchase.
Any warranty claim must be submitted in writing accompanied by photographs of the defective part.
All shipping charges for the return of faulty products must be paid for by the customer. Consequently, do not return goods without our written authority to do so.
Consumable items such as Tyres, Rims, Jockey Wheels, Brake Pads or Wheel Bearings are not covered under our warranty policy.
WHEEL NUTS may loosen after the first few kilometres of use and must be checked and re tightened if necessary.
TRAILER GUYS will not be responsible for; Any loss or damage resulting from your failure to undertake this matter.
- The warranties herein contained are non-transferable and apply to the original purchaser only
- Exercise of any of the above Warranties is subject to; delivery of the trailer to Trailer Guys including proof of purchase and the actual date of purchase.
- This warranty does not cover the cosmetic appearance of the galvanised surface of a trailer or its components. It does not extend to rust on painted and zinc coated surfaces.
- This warranty does not extend to any trailer which is found to have been used for any purpose other than that for which it was manufactured. Which is found to be over loaded. If it is found to be altered or modified in any way or; Which malfunctions due to prior damage, unreasonable use or failure to provide reasonable and necessary maintenance.
- Trailers used as part of a rental fleet or for a commercial purpose are not covered by this consumer warranty.
- If damages to the trailer or its failure to operate properly are because of abuse, neglect or misuse, warranty will be void and you will be charged for parts and labour.
- Damage caused as a result of incorrect application of any accessories fitted or failure to correctly attach accessories, are not covered by this warranty.
- This warranty will be negated by and Trailer Guys will not bear any responsibility for any warranty procedure or charge carried out without written authorisation by Trailer Guys.
- Trailer Guys reserves the right to improve any of its products through changes in design or materials as it may deem desirable without being obligated to incorporate such changes in products of previous manufacture.
- There shall be no implied or actual warranty with respect to the manufacture of, merchantability, or fitness for a particular purpose of any Trailer Guys trailer and Trailer Guys shall not be liable for any transportation charges, or for any direct, special, incidental, consequential (including loss of profit) or other loss or damage, whether based in contract, or arising from breach of any warranty or otherwise provided that Trailer Guys acknowledges that this warranty does not exclude or limit the application of any provision of any statute (including the Trade Practices Act) where to do so would contravene that Statute or cause any part of this agreement to be void (“non-excludable condition”). Trailer Guys total liability hereunder for a breach of any non-excludable condition (other than implied by Section 69 of the Trade Practices Act) is limited at its option to any one of supplying, repairing or replacing or paying the cost of supplying, repairing or replacing a trailer.
We are located at 1 Lensgate Road (just off Pine Ridge Road) in Coombabah, Gold Coast, very close to all Brisbane residents looking for a quality box trailer. Turn off the M1 at Exit 62 (Helensvale South) then follow Brisbane Road for 5.5km. Turn left into Pine Ridge Road (same side as Norco Milk Factory). Turn left into Lensgate Road and we are directly behind ROBCO Glass.
Our family owned and operated Australian business designs and builds our range of hot dipped galvanised box trailers. Ranging in sizes from the affordable 6×4 up to the huge 10×6 for Tradies looking for a ‘work horse’. Brisbane may not have the right quality box trailer to suit your requirements so please ask any questions and we’ll provide the sound advice you need!
All our box trailers come with a 12 month warranty period, extending our commitment to our Brisbane customer’s satisfaction.
Please remember that our trailers are 100% Hot Dipped – NOT Gal Sheet or Painted therefore our trailers will provide you with a 20 to 30 year economic life span.
We recommend that you give your new TRAILER GUYS Trailer a ‘nick name’ as it will be in your family (or workplace) for a looong time!!
ALL Trailer Guys Hot Dipped Galvanised Trailers now include a range of Safety Features to help with ‘Carrying Your Load’.
TIE DOWN RAILS to the FRONT & REAR Tail-gates in addition to the two already fitted to both sides. These robust attachment rails to ALL FOUR SIDES now allow you to securely strap down your load.
ANTI RATTLE CATCH is added to the front of the trailer to ensure that your trailer will be as quiet as a mouse whenever you travel.
DUAL SPRING BOLT LOCKING PINS on both sides of the drawbar to offer a positive locking feature. This then prevents the tub tilting when transiting and loading.
In the meanwhile, please drop into our Display Yard at 2/610 Pine Ridge Road, Coombabah (behind ROBCO off Lensgate Road) to view these safety features first hand.