How to Measure a Trailer Hub for the Correct Size Grease Cap for a 1993 Coleman Pop-up Camper
Question:
I have a 1993 coleman popup with a 5 0n 4 1/2 hub how do I determine the grease cap size. Bought 2 from some one else they seamed to fit but on first trip they came off.
asked by: William W
Expert Reply:
You would need to measure the inside diameter of the hub opening to determine which cap size is needed. You would want to choose a cap whose outside diameter matches the inside diameter of the hub.
Some of the most common sizes are 1.980 inch, 1.986 inch, 2.441 inch and 2.717 inch. As you can see the sizes can differ by very small amounts. To measure accurately to two or three decimal places, I'd recommend using a digital caliper like part # PTW80157 so that you can be confident you are getting the correct size for your hub. I have included a link to our grease cap main page for you.
Products Referenced in This Question
4" Carbon Fiber Digital Caliper
- Hand Tools
- Measuring and Layout Tools
- Digital Calipers
- Carbon Fiber
- Performance Tool
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Product Page this Question was Asked From
Grease Cap, 1.988" OD Drive In - Qty 2
- Trailer Bearings Races Seals Caps
- Caps
- Standard Grease Cap
- 1.98 Inch O.D.
- TruRyde
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on Trailer Bearings Races Seals Caps
Jeff Z.
5/17/2020
I am definitely looking for a 1 inch 5/8 wheel bearing cap for a boat trailer that someone put together it looks like odd parts. I need two of them. Please advise.