What's the Backspace Measurement on WST49FR
Updated 09/14/2026 | Published 09/04/2026
Question:
What is the backspace on this wheel
asked by: Rob
Expert Reply:
Hey Rob!
The Westlake ST205/75R15 Trailer Tire with Black Liger Aluminum Wheel # WST49FR has a 0" offset, so the wheel has about 3" of backspacing from the mounting surface to the inside edge of the rim.
If you're checking clearance to the trailer frame or suspension, keep in mind the tire itself is wider than the wheel, so you'll want to account for roughly 4" of clearance from the hub mounting surface to the inside sidewall of the tire.
What is the clearance measurement you're working with on your trailer?
Product Page this Question was Asked From
Westlake ST205/75R15 Trailer Tire with Black Liger Aluminum Wheel - 5 on 4-1/2
- Trailer Tires and Wheels
- Tire with Wheel
- Radial Tire
- Load Range D
- 205/75-15
- 15 Inch
- L - 75 mph
- 5 on 4-1/2 Inch
- Aluminum Wheels
- Westlake
more information >
Continue Researching
- Q&A: What is the Best Toilet that Feels like Home for My Camper with Elongated Seat?
- Q&A: Recommended ST205/75R15 Tire with Aluminum Wheel
- Q&A: Difference Between Trailer Tire Sizes ST205/75R15 and ST225/75R15
- Q&A: Does It Matter Which Way the Trailer Axle Is Facing
- Q&A: Which is a Better Wheel to Use in Saltwater - Steel, Galvanized, or Aluminum
- Q&A: Are There Hub Caps for 14 inch Trailer Wheels
- Q&A: Can Aluminum Trailer Wheels be Used on Boat that Sees Saltwater
- Article: How to Measure Your Trailer Wheel Bolt Pattern
- Article: How to Measure for Travel Trailer and Fifth Wheel Steps
- Article: Trailer Wiring Diagrams
- Article: The Best Trailer Tongue Locks for Preventing Trailer Theft
- Article: Trailer Drum Brakes vs. Disc Brakes: Making the Decision
- Article: How to Tell the Weight Rating of a Trailer Axle
- Article: How to Tie Down a Motorcycle
Brian H.
9/10/2026
The back space is 3" from mounting surface to outer bead of rim/wheel. With the tire on and at 65 psi it is 4" from mounting surface to the tire. I am happy with the wheel and tire as I bought as a complete set up for a spare on my 16' ATC trailer tandem axle. Fast shipping, professional packaging, no scratches ! Hope this helps.