There will be no performance issues whatsoever going from leaf springs with 4 leaves to leaf springs with 3 leaves. So long as you have the correct length, the springs are going to work superbly. The 3-leaf, 4,000 lb leaf springs we have measure 25-1/4" from center of spring eye to center of spring eye:
- 3-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 25-1/4" Long # e57SR view full answer...