The
AL-KO tandem Rocker Roller axle system is a load sharing
suspension system designed to ensure a smooth transfer of weight
from the
front to the rear axle and thus reduce any shock load or vibration on your trailer or
caravan.
The AL-KO Rocker
Roller is available for 14", 15" and 16" wheel spacings and suits a Gross Trailer Mass (GTM) of 1,900 to
4,000kg. Driver fatigue is
minimised due to smoother handling and safer towing and
less wearing parts ensures
lower maintenance costs,
over a longer period of
time.
Download the ALKO Rocket Roller Suspension Broucher here.
IMPORTANT: Some states have different
rules when it comes to load sharing and tandem axles so check out your state
regulations. Here is a simple explanation of how tandems
work.
- Slipper springs put the entire load on one axle in
some circumstances so you need each axle to be rated to take the entire load
of the trailer. Example: If you wish to have a 2 tonne trailer then you will
need 2 x 50mm Round Axle. One 50mm axle is rated at 2000kg
- Tandem spring, eye to eye setups are load sharing
and allow the load to be shared between two axles. example: If you wish a 2
tonne trailer then you will need 2 x 40mm Square axles. One 40mm SQ axle is
rated at 1000kg
Here the difference. Go over a gutter and
stop.
- Leaf springs will lift one wheel off the ground
because it is not sharing the load. All the weight goes to the wheel still on
the ground. I use this method to change tyres and check wheel bearings on the
boat.
- Eye to eye tandem setups will see one wheel on the
top of the kerb and one wheel in the gutter thereby still sharing the load
across both axles. The rocker assembly on this tandem setup shifts the weight
between axles.
NOTE: All spring sets are
priced per side. Some folks need to replace one side
only.
STANDARD TANDEM
Free Camber
120mm | Eye to Eye 700mm | Eye to Centre Bolt 386mm | Eye to Rocker Centre 825mm
| Axle Centres 893mm
ROCKER
ROLLER
Free Camber
117mm | Eye to Eye 687mm | Eye to Rocker Centre 787mm | Axle Centres 785mm - 14"
and 888mm 16"
| 
