Replacement Shackle Straps for a Triple Axle 2016 Forest River XLR Nitro Thunderbolt 395 AMP
Updated 12/22/2025 | Published 10/23/2024
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Question:
I have a 2016 Forest River XLR Nitro Thunderbolt 395 AMP. Triple Axle. I need advice on the best least expensive way to change the shackles on the axles and springs. The stock ones are rusted in one position. Also if measurements are needed. Let me know what those are. Thanks.
asked by: Bryan S
Expert Reply:
Hey Bryan, thanks for reaching out!
In order to get you some replacement shackles I'll need you to measure the length of your shackles, which is center eye to center eye (see attached photo).
The most common lengths are 1-1/4" and 3-1/8" so for just replacement shackle straps you'd need # TRSL225 or # TRSL313 respectively. These come in a quantity of 1 so you'll need to adjust the quantity to match how many you're planning on replacing.
(click to enlarge)
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Kate F.
12/22/2025
Hey Bryan, were you able to get those shackle measurements for your XLR Nitro Thunderbolt? Once you have them, I can help confirm which size strap will fit best. Let me know what you find so we can narrow it down.