How to Measure a Trailer Hub for the Correct Size Grease Cap for a 1993 Coleman Pop-up Camper
Updated 05/20/2020 | Published 06/27/2009
Products Featured in This Question
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.
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
- 1.99 Inch O.D.
- 1.99 Inch
- 2000 lbs Axle
- 2200 lbs Axle
- 2500 lbs Axle
- 3000 lbs Axle
- 3500 lbs Axle
- TruRyde
more information >
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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.