Shackle Size Recommendation Guides
Moose Knuckle Offroad
Shackle Size Recommendation Guide.
Find the right shackle for your vehicle weight, recovery point, and intended use. Downloadable PDF guides included for every shackle type.
How to Choose
5 Steps to the Right Shackle.
1
Check Your Vehicle's GVWR
Find the Gross Vehicle Weight Rating on your driver's side door jamb or owner's manual — it's the maximum loaded weight of your vehicle. If you've modified your rig (lift kit, heavy axles, rooftop tent, topper) factor that extra weight in on top of the manufacturer figure.
2
Choose a Shackle with Adequate Working Load Limit (WLL)
Your shackle's WLL should be at least 1.5–2× your vehicle's GVWR for safe recovery operations. Don't underspec — a shackle failure during a recovery is a serious safety risk.
3
Measure Your Recovery Point Hole Diameter
Use calipers to measure the inside diameter of the hole on your bumper or recovery point. If you only have a tape measure, lay it across the hole and account for any coating or paint that may reduce the effective inside diameter.
4
Select the Right Pin Diameter
The shackle pin should fit snugly without excessive play. Common shackle sizes are ½, ⅝, ¾ and ⅞ inch — pin diameters run ⅛ inch larger than the stated size. If your hole is a touch loose, check out our Rattle Rings, Nylon Washers and Shackle Adapter Sleeves in the Recovery Parts section.
5
Factor in Safety and Material Quality
Always choose forged chromoly or carbon steel shackles — avoid aluminium shackles, which are ornamental only. All MKO shackles carry a 5:1 Factor of Safety, meaning the Minimum Breaking Strength is 5× the Working Load Limit.
Not sure which shackle is right for you?
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