Description
The TruRyde Square SP104BT8X BT8 Spindle & 4-4″ Bolt Circle Trailer Hub (Part SP1BT8BT121E) is a complete, ready-to-install spindle and hub assembly designed for light-duty trailer applications. This square BT8 spindle paired with a compact 4 on 4″ bolt circle hub delivers reliable performance and easy installation for small utility, cargo, and specialty trailers.
Square SP104BT8X BT8 Spindle & 4-4″ Bolt Circle Trailer Hub. 4 studs 4″ Bolt circle using L44643 inner and outer bearing hub. (BT8 Spindle 1in.). Hubs are pre-raced & pre-studded with 1/2″-20 studs. Includes Hub, inner bearing, outer bearing, seal, grease cap & lug nuts. BT8 Spindle, Spindle base size=1 1/4″ Spindle length=3 3/8″ Overall length =8 1/4″ Capacity (pair) 1,000 lbs.
Key Features
- Part Number: SP1BT8BT121E
- Brand: TruRyde®
- Spindle Type: Square SP104BT8X BT8 (1″ spindle)
- Spindle Dimensions: Base 1-1/4″, Length 3-3/8″, Overall 8-1/4″
- Bolt Circle: 4 on 4″
- Studs: 1/2″-20
- Bearings: L44643 Inner & Outer
- Contents: Square BT8 Spindle, Hub with Bearings & Seal, Grease Cap, Lug Nuts
- Capacity: 1,000 lbs. (Pair)
- Quality: Pre-raced and pre-studded for easy installation
Ideal for small utility trailers, cargo trailers, boat trailers, ATV trailers, and other light-duty single axle applications up to 1,000 lbs. per pair.
Questions about this TruRyde spindle and hub combo or compatibility? Call our trailer experts at 1-800-866-3336.
Browse more Trailer Axles & Suspension Kits.
| Part No | Quantity | Description |
| X1023R | 4 | Nut, Cone 60-Deg |
| RVI-BT-4400 | 1 | Hub, 2K, 440, Cupped & Studded |
| GS-1250DLR | 1 | Seal, Grease 1.25 ID |
| DC-200 | 1 | Grease Cap |
| L-44643 | 2 | Bearing Cone (L44643) |
| SP104BT8 | 1 | 1.25″ Square BT8 Spindle |
| FS-SN100 | 1 | 1″ Spindle Nut |
| FA-SW100 | 1 | 1″ Spindle Washer |
| 18X134CP | 1 | Cotter Pin |
