What Does It Mean When a Trailer Axle Has "Pads Loose"?
Answered by Trailer Parts Unlimited
Customer Question: “I see HF/SC options on your trailer axles, but some say ‘Pads Loose.’ What does that mean?”
Quick Answer:
“Pads loose” means the spring pads (also called perches or spring seats) are included but not welded to the axle. This gives you the freedom to weld them wherever you need to match your trailer’s existing hanger width.
What's the Difference Between HF, SC, and Pads Loose?
| Option | Description | Pads Welded? | When to Choose |
|---|---|---|---|
| SC (Spring Center) | Hub face + spring pad spacing included | ✅ Yes | Standard trailer width – ready to install |
| SC with Pads Loose | Spring pads included but not welded | ❌ No | Custom trailer width or exact fit needed |
Why “Pads Loose” Can Be a Better Option
If your trailer was built with an uncommon frame width or your spring hangers are already welded in place, an axle with pre-welded spring pads may not line up properly.
That’s where “pads loose” comes in — it gives you more flexibility to:
- Match your existing hanger width
- Avoid cutting and re-welding hangers
- Build or modify custom trailer setups
We can also weld the spring pads for you before shipping — just provide your exact spring center (SC) measurement and we’ll handle it for a small charge.
Reminder: The spring pads are what your trailer springs rest on. The springs then connect to your trailer’s frame via welded hangers — so everything must align properly.
Staff & Builder Training Summary
- “Pads loose” = Spring pads included, but NOT welded
- Also called spring perches or spring seats
- Great option for custom or non-standard trailer widths
- Offer pad welding if customer provides SC measurement
- Warn customers that pre-welded options may not fit every trailer