Suspension 103
The other two types of suspensions are more common in todays armored fighting vehicles: Christie and Tight
The Christie type suspension has no support or return type rollers. Instead the track returns to the drive sprocket or idler by riding along the top of the roadwheels.
In a tight suspension, or supported as it is mostly referred to, the track returns to the drive sprocket or idler on top of return rollers like with the 2S3.