How to Tell if Trailer has a BT8 or BTR Spindle Installed
Updated 06/16/2025 | Published 07/27/2016
Products Featured in This 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
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.
Product Page this Question was Asked From
Trailer Idler Hub Assembly for 2,000-lb Axles - 4 on 4 - L44643 Bearings - Pre-Greased
- Trailer Hubs and Drums
- Idler Hub
- Pre-Greased
- Standard
- L44643 / L44643
- Standard Grade
- For 2000 lbs Axles
- 1/2 Inch Stud
- 4 on 4 Inch
- 8 Inch Wheel
- 10 Inch Wheel
- 12 Inch Wheel
- 13 Inch Wheel
- 14 Inch Wheel
- etrailer
more information >
Continue Researching
- Search Results: trailer hubs and drums
- Shop: Trailer Idler Hub Assembly for 2,000-lb Axles - 4 on 4 - L44643 Bearings - Pre-Greased
- Search Results: btr spindle
- Shop: Trailer Idler Hub Assembly for 2,000-lb Axles - 5 on 4-1/2 - Galvanized
- Search Results: trailer bearings races seals caps
- Video: All About the Trailer Idler Hub Assembly for 2,000-lb Axles
- Q&A: What Is the Difference Between a BTR and BT8 Spindle
- Search Results: spindle cotter pin
- Search Results: cotter pins
- Search Results: static/images/styles/checksvg
- Search Results: 1 1/16 x 1 1/16 hub kit
- Shop: Complete Bearing Kit with L44649 Inner/Outer Bearings and 10-9 Grease Seal Fits 1.063" Spindles
- Shop: Easy Grease Trailer Idler Hub Assembly for 2K Axles - 4 on 4 - L44649 Bearings - Pre-Greased
- Shop: Dexter Trailer Idler Hub Assembly - 2,000-lb and 2,200-lb E-Z Lube Axles - Pre-Greased - 5 on 4-1/2
- Shop: Trailer Idler Hub Assembly for 2,000-lb Axles - 5 on 4-1/2
- Shop: Replacement Trailer Hub Bearing - L44649
- Shop: Trailer Hitch
- Video: Review of etrailer Trailer Hubs and Drums - Pregreased Idler Hub - AKIHUB-440-2-1K
- Video: DIY Installation for the etrailer Galvanized Trailer Idler Hub Assembly for 2,000-lb Axles
- Video: An In-Depth Look at the Easy Grease Trailer Hub and Drum Assembly for 2K Axles
- Shop: Trailer Wiring
- Video: Review of Dexter Trailer Bearings Races Seals Caps - Bearing Kit 1-1/16 Inch BTR Spindle - DX59UR
- Video: Review of the Trailer Idler Hub Assembly for 2,000-lb Axles
- Q&A: How to Determine the Size of a Trailer Hub Assembly for Replacement
- Article: Replacing the Bearing, Races and Seals on a Trailer Hub
- Q&A: 2006 Yacht Club Boat Trailer Hub Replacement Recommendation
- Video: Review of CE Smith Trailer Axles - Trailer Axle Beam with Studded Hubs - CES84XR
- Q&A: eTrailer Axle Technology Trailer Hub and Drum Assembly compared to Titan Hub and Drum
- Q&A: High Speed Rated Trailer Tire Size 4.80-12
- Q&A: Does Trailer Hub part # AKIHUB-440-2-2K Replace Hub that has Bearing Numbers L44649
on Trailer Hubs and Drums
Jay
6/8/2025
what hub kits will fit on 0.749" spindles