How to Measure Bolt Pattern to Pick the Correct Wheel
Question:
I have a 5 lug wheel on my boat trailer. I need new tires and the wheels are getting pretty rough too. The tire is ST175/80R-13. I measured the lugs and got 4.25inch 112mm and all I seem to be able to find on your site is 4.5inch Did I measure incorrectly? I measured from the top lug to both of the farthest from it and it was 4.25inch for both. Thanks for your help.
asked by: Robert V
Expert Reply:
It sounds like you may have measured incorrectly, though you were on the right track. There are actually a couple of ways for you to find your bolt pattern. The first way is to measure from the center of one lug to a point halfway between the two lugs directly opposite on the bolt circle. The other method would be to use the distance between the center of one bolt hole to the center of the bolt hole adjacent to it. If the distance is:
2-5/8" - the bolt pattern is 5 on 4-1/2
2-3/4" - the bolt pattern is 5 on 4-3/4
3" - the bolt pattern is 5 on 5
3-1/4" - the bolt pattern is 5 on 5-1/2
Once you do find your bolt pattern I'd be happy to recommend some tire and wheel combinations. I have added a link to our page with each of our available tires and wheels, as well as a link to a help article on finding wheel bolt patterns.
Product Page this Question was Asked From
Karrier ST175/80R13 Radial Trailer Tire with 13" Galvanized Wheel - 5 on 4-1/2 - Load Range D
- Trailer Tires and Wheels
- Tire with Wheel
- Radial Tire
- Load Range D
- 175/80-13
- 13 Inch
- M - 81 mph
- 5 on 4-1/2 Inch
- Steel Wheels - Galvanized
- Boat Trailer Wheels
- Kenda
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: Karrier ST175/80R13 Radial Trailer Tire with 13" Galvanized Wheel - 5 on 4-1/2 - Load Range D
- Q&A: What to Consider when Going from a 175/80B13 Tire Size to a 185/80R13
- Q&A: What Size Trailer Tires Will Replace B78-13 Trailer Tires
- Article: Printable Trailer Bolt Hole Pattern Template
- Q&A: Can 13 inch Trailer Wheel and Tire Replace 12 inch Size 5.30-12
- Q&A: Differences Between Radial and Bias Ply Trailer Tires
- Q&A: Can ST175/80R13 Radial Trailer Tire Replace 165/80-13 Size Tire on Boat Trailer
- Q&A: Does Karrier ST175/80R13 Radial Trailer Tire Come Balanced
- Q&A: Choosing Between Galvanized Trailer Wheels and Aluminum Trailer Wheels for a Boat Trailer
- Shop: CE Smith Galvanized Steel Step for Trailer Fender - 15-1/4" Long x 3" Wide - Qty 1
- Shop: Kenda Karrier ST185/80R13 Radial Trailer Tire - Load Range D
- Article: Trailer Tire Sizing
- Shop: Kenda Karrier ST205/75R15 Radial Trailer Tire with 15" Black Mod Wheel - 5 on 4-1/2 - LR D
- Shop: Trailer Hitch
- Search Results: 25580
- Video: Choosing the Right Trailer Wiring
- Article: Trailer Wiring Diagrams
- Search Results: lug nut
- Shop: Trailer Wiring
- Article: Most Popular Wheel Bearings
- Search Results: fender
- Shop: Brake Controller
- Shop: Hub Bearing Kit for Lippert, Dexter, and AL-KO Axles - 3,500 lb with #84 Spindle
- Shop: Suspension Enhancement
- Video: Timbren Axle-Less Trailer Suspension System Installation
- Search Results: equalizer
- Shop: etrailer Electric Trailer Brakes - Self-Adjusting - 10" - Left/Right Hand Assemblies - 3.5K
- Article: How to Choose the Right Trailer Hitch Class
- Shop: Gooseneck Hitch
- Shop: Tekonsha Prodigy P3 Trailer Brake Controller - 1 to 4 Axles - Proportional
on Trailer Tires and Wheels
