Hi David,
The SRE4000 is no longer available and has been replaced by the AllTrek 4000, and there are a couple difference between the AllTrek and CRE3000. First, here are the part numbers for a tandem axle trailer with 33" wheelbase:
- MORryde ALLTREK 4000 Shock Absorbing Equalizers # MR89DR
- MORryde Rubber Equalizers # MR87ZR
The differences between the AllTrek 4000 and the CRE3000 (which is the latter part above) is the longer slot on the AllTrek which gives more suspension travel... view full answer...