AtlasRV offers three variations (two models OE) of coil spring for Track Tvan 2000-current and two variations on the original Topaz coil spring.
 
The following springs are standard fitment at factory (Track Trailer)
Tvan_Factory ATM 1500kg - SPTT-005
Tvan_Factory ATM 1800kg - SPTT-753
Topaz_SPTT-607
 
AtlasRV recommend the following spring models based on travel weights (total van weight including drawbar with full water tanks)
 
Tvan_Min-1250kg - SPTT-005
Tvan_1250-1650kg - AAG-005B (15% rate increase on SPTT-005)
Tvan_1650-1800kg - SPTT-753 (33% rate increase on SPTT-005)
Topaz_Min-1850kg - AAG-607 (Original Spring/Rate - Improved Design)
Topaz_1850-2250kg+ - AAG-607B (8% rate increase on original, 10mm taller free height)
 
Tvan_Note - The AAG-005B provides a spring rate between the two OE options and is suitable for most application. The AAG-005B is sourced from the same supplier as the original OE options (King Springs)
 
Topaz_Note – The AAG-607B is a revised version of the original with improved finishing techniques (higher rate and free height); this spring is designed to help manage slightly heavier Topaz vans whilst addressing wheel alignment issues (excessive negative camber). This spring helps to control excessive tyre wear and body roll and improves general handling characteristics of Topaz vans.
 
Note - Track now source their springs from Tenneco. Tenneco springs are also available at customer request and are commonly stocked.