I purchased this kit in 2021 and it was a straight tube. No flip kit was needed to mount below leafs.
Ultra-Tow 2000-Lb. Capacity Complete Axle Kit — 60in. Hubface, 48in. Spring Center, 5-Stud Pattern, 4.5in. Hubs

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- Durable welded spring seats with double-eye springs for smooth-riding performance
- Axle tube has hard shell powder-coat finish
- Hubs are packed with Lucas Oil Products grease
- Triple lip seal
- Straight axle
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Description
Key Specs
Reviews
Q & A
Warranty
Compare
Product Summary
What's Included
- (1) Axle with 2 attached hubs
- (2) Springs
- (1) U-bolt kit
- (1) Hanger kit with hardware
Features + Benefits
- Durable welded spring seats with double-eye springs for smooth-riding performance
- Axle tube has hard shell powder-coat finish
- Hubs are packed with Lucas Oil Products grease
- Triple lip seal
- Straight axle
- 5 stud on 4.5in. bolt circle
- 2000-lb. capacity
- 64 3/4in. overall length
- 60in. hubface
- 48in. spring center
- 1 1/16in. inner bearing
- 1 1/16in. outer bearing
- 1.25in. seal
Key Specs
| Attribute | Specification |
|---|---|
item# | 48182 |
Brand | Ultra-Tow |
Manufacturer's Warranty | 1 year Limited Warranty |
Ship Weight | 59.0 LB |
Max. Spring Centers Length | 48 in |
Weight Capacity | 2,000 lb |
Axle Tube Type | Round |
Studs (qty.) | 5 |
| Attribute | Specification |
|---|---|
Bolt Circle Pattern | 4.5 in |
Seal Size ID | 1.25 in |
Bearing Size ID | 1.0625 in |
Bearing Size OD | 1.0625 in |
Axle Outside Diameter | 1.75 in |
Springs Included | Yes |
Hubs Included | Yes |
Brakes Included | No |
Reviews
Questions & Answers
Questions
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· 9 years ago
if axle is straight, what prevents flipping the springs?
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Csapper7· 3 years ago
Helpful?
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UltraTowExpert11· 3 years ago
Although the axle is advertised as straight, this refers to the design and not the actual construction of the axle. The axle will have a very slight bend made into them to produce a slight positive camber at the wheel when unloaded. This is done so when the axle is loaded and flexes, the wheels will be vertical with zero camber. If you flip it over, it will have negative camber when unloaded and even more negative camber when loaded. This will cause the inside of the tires to wear more than the outside and also make the trailer wander.
Helpful?
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Jagdriver· 7 years ago
Although the axle is advertised as straight, that refers to the design and not the actual construction of the axle. These axles have a very slight bend made into them to produce a slight positive camber at the wheel when unloaded. This done so when the axle is loaded and flexes the wheels will be vertical with zero camber. If you flip it over it will have negative camber when unloaded and even more negative camber when loaded. This will cause the inside of the tires to wear more than the outside and also make the trailer wander.
Helpful?
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· 6 years ago
Is the spring center actually 48" or is it 46"
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UltraTowExpert11· 3 years ago
The spring center distance from the center of one spring to the center of the other is 48 inches.
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nelsberr· 6 years ago
48” center. True to specs
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· 9 years ago
Is spring center adjustable?
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Nordic· 9 years ago
Spring Center is not adjustable. Your frame must fit Spring centers.
Helpful?
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UltraTowExpert13· 9 years ago
The spring center distance is not adjustable on this axle kit.
Helpful?
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· 2 years ago
What type of threads for the Lugnuts on No wheel studs
1 answer-
UltraTowExpert11· 2 years ago
The threads on the lug nuts are 1/2"-20. The threads are not tapered.
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· 3 years ago
Is the axle center a tube? What is the outter and inner diameter of that tube?
1 answer-
UltraTowExpert12· 3 years ago
The outer diameter of the axle tube is 1.75". The wall thickness is 0.188" +0.006" / -0.012".
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· 3 years ago
Will this fit the ultra tow aluminum 5x8 trailer
1 answer-
UltraTowExpert38· 3 years ago
This kit is too long for the Ultra Tow 5x8 trailer.
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· 4 years ago
What would be the best or largest tire I could use for this setup?
1 answer-
UltraTowExpert11· 3 years ago
The axle kit is compatible with any tire/rim assembly with a 5 hole 4.5 inch bolt circle. For example, item number 121277 (ST205/75R-15) 5 hole rim/tire assembly will work with the axle kit.
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· 4 years ago
is there an assembly digram for this axle kit?
1 answer-
UltraTowExpert11· 3 years ago
Assembly instructions are not included with the axle.
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· 4 years ago
does it come with out springs??
1 answer-
UltraTowExpert12· 4 years ago
This axle kit includes two springs.
Helpful?
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· 4 years ago
can correct replacement axle be determined from year and VIN number
1 answer-
UltraTowExpert29· 4 years ago
To best determine what replacement axle is needed, you will need to measure the overall length, hubface length, and spring center of your old axle.
Helpful?
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Warranty
Manufacturer's Warranty
1 year Limited Warranty
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Specifications
48 in
-
49 in
73.5 in
2,000 lb
2,200 lb
2,000 lb
3,500 lb
Round
Square
Square
Square
5
-
-
-
4.5 in
-
-
-
1.25 in
1.25 in
1.25 in
1.71 in
1.0625 in
1.063 in
1.063 in
1.375 in
1.0625 in
1.063 in
1.063 in
1.063 in
1.75 in
-
1.5 in
2 in
Yes
-
No
No
Yes
No
No
No
No
No
No
No
-
Torsion Axle
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Spring Axle
-
Yes
No
No
-
73.5 in
59.5 in
85 in
-
-
43 in
69.5 in
-
-
-
Yes
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