How to Tell if Trailer has a BT8 or BTR Spindle Installed

Question

Question:

I need a hub, wheel and tire, lug nuts. Its a 1 inch spindle shaft. How do I know if it is a BT8 or BTR or what?

asked by: Greg B

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Expert Reply:

A BT8 spindle would have a diameter of .99 of an inch where the bearings would both install and would have a diameter of 1.24 where the great seal would ride. That would require a hub part # AKIHUB-440-2-1K for an idler hub.

A BTR spindle would have dimensions of 1.06 inch for outer and inner bearing plus 1.50 inch where grease seal would install. That would require an idler hub part # AKIHUB-545-2-G-2K.

expert reply by: Jameson C

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Answer 1

The BTR and BT8 denotations refer to the spindle, not the trailer hub. The difference between a BTR and BT8 spindle is that the BTR spindle uses a 1.063" diameter L44649 bearing and the BT8 spindle uses a 0.99" diameter L44643 bearing. In…

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Answer 2

BTR and BT8 are the reference numbers for a standard trailer spindle size. When picking out a hub for a trailer you have to make sure that the hub is designed to fit the spindle. What you will need to do is measure spindles on your trailer where the…

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Answer 3

The difference between an load range C and load range D tire in the same size is the capacity and psi rating. The two tires will still have the same dimensions and fit on the same wheel. The D rated tire has a higher capacity. For a ST175/80D13 like…

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Answer 4

We've had customers with your Dico 45263 hub in the past get us their bearing numbers so we know that for a replacement with the wheel bolt pattern you need you could use the #AKIHUB-545-2-G-EZ-2K and you'd be set.

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Answer 5

In order to verify the spindle dimensions so that you can pick out the correct hub/drum you have to get exact dimensions. For that you need to use a digital caliper like part #PTW80157. For how old your trailer is this is especially important as the…

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Answer 6

You can add larger wheels and tires to a trailer as long as you have enough room for the larger size. The main clearance issues we find when putting larger tires and wheels on a trailer is from the top of the tire to the fender and from the inside…

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Answer 7

The #84 spindle is just a common way to identify the spindle dimensions typically used for 3,500 lb axles. So instead of listing out the parts, people can just say they have #84 spindles and it's easier to know what fits it. The CE Smith Trailer…

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Answer 8

For your utility trailer, I recommend the Trailer Idler Hub Assembly for 2,000-lb Axles - 5 on 4-1/2 - Galvanized #AKIHUB-545-2-G-1K since you use it for boat launching. This assembly will include all of your bearings, races, and grease seal. Your…

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Answer 9

While we do not offer a hub exactly with what you need you can easily use the Trailer Idler Hub Assembly #AKIHUB-545-2-G-2K and replace the grease seal for the Seal Set #BB60005 you found. Our hub is sold individually but the seals come as a set for…

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Answer 10

In order to get a ball mount that has effectively 0 inches of rise or drop you would need to get a Trailer Hitch Ball Mount, part #D-4, like the one you referenced that has a 2 inch drop, and then use a 2 Inch High Rise Ball, part #C40034. I attached…

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Answer 11

Really it's going to boil down to which spindle type your Bayliner Capri has. The Easy Grease Trailer Idler Hub Assembly for 3.5K Axles #AKIHUB-545-35-G-EZ-K will work with 3,500-lb Dexter E-Z Lube and etrailer Easy Grease trailer axles with #84…

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Answer 12

It sounds like you're looking for the Trailer Idler Hub Assembly for 2K Axles part #AKIHUB-545-2-LF-2K which has a 5 on 4-1/2" bolt pattern and uses two L44649 bearings. This is designed for a 2,000/2,200 lb axle which if this is your…

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How to Tell if Trailer has a BT8 or BTR Spindle Installed

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