How to Choose the Correct Leaf Springs and U-Bolts for a 2015 Grand Design Reflection 303RLS
Updated 04/16/2026 | Published 04/09/2026
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Question:
What is the correct replacement leaf springs for a Grand Design 2015 Reflection 303RLS? As well as u bolts?
asked by: VJ
Expert Reply:
Hi VJ, that’s a really good question, and I’m glad you’re taking the time to get this right before ordering because it makes a big difference in how everything fits and rides.
The 2015 Grand Design Reflection 303RLS is equipped with tandem 5,200 lb axles. For that axle size, the most common leaf spring you’ll see is a 1-3/4 inch wide double eye spring that measures right around 25-1/4 inches long like part # DX45CR that you were looking at. U-bolts will be sized for a 3 inch diameter round axle like part # APUBR-8 which is the typical setup for 5,200 lb axles.
That said, I don’t want you guessing on this part. Even within the same model, spring length and setup can vary slightly, and that’s where people run into alignment issues or poor ride quality.
The best thing you can do is measure your current springs before ordering. With the trailer lifted just enough to take weight off the suspension, measure from the center of one eye to the center of the other in a straight line. Then measure the width of the spring. For the U-bolts, measure straight across your axle tube to confirm it’s right around 3 inches.
f your springs look flattened, stretched, or have any cracked leaves, that’s a clear sign they’re due for replacement even if the length seems slightly off.
If you want, you can send me those measurements and I’ll make sure everything lines up perfectly before you order so you don’t run into any surprises. Are you replacing these because of sagging or just doing a full suspension refresh?
Product Page this Question was Asked From
4-Leaf Double-Eye Spring for 5,200-lb Trailer Axles - 25-1/4" Long
- Trailer Leaf Springs
- Double Eye Springs
- 9/16 Inch Eye
- Nylon Bushings
- 5200 lbs
- 1-3/4 Inch Wide
- 4 Leaf
- 25-1/4 Inch Long
- Standard Grade
- Dexter
more information >
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Travis
4/16/2026
I would recommend checking your user manual and checking to see which axels you have specifically. Give etrailer a call and they should be able to get you a part number to match. That's what I ended up doing, and the parts fit perfectly. There is also a stamp on the axels as well for the part number if you do not have your manual anymore.