To measure limit straps for your SxS (Side-by-Side) accurately, you need to determine the maximum extension point of your suspension and then factor in the necessary slack to protect your shocks and other components. Proper measurement ensures your limit straps prevent your shocks from "topping out" and your CV joints from over-extending, which can lead to costly damage.
Here's a step-by-step guide to measuring limit straps:
Why Accurate Limit Strap Measurement is Crucial
Limit straps are essential components for any off-road vehicle, especially UTVs and SxSs that experience aggressive terrain. They serve several critical functions:
- Prevent Shock Damage: They stop your shocks from reaching their absolute maximum extension, protecting internal components from abrupt impacts and wear.
- Protect CV Joints: Over-extending can put excessive strain on your constant velocity (CV) joints, leading to premature failure. Limit straps keep them within their safe operating range.
- Maintain Drivetrain Health: By controlling suspension droop, limit straps help preserve the life of axles, drive shafts, and other drivetrain components.
Tools You'll Need
Before you begin, gather the following tools:
- Floor Jack or Hoist: To safely lift the SxS and allow the suspension to fully droop.
- Jack Stands: For safety, always support the vehicle with jack stands.
- Reliable Tape Measure: A steel tape measure offers the best accuracy.
- Pen and Paper: To record your measurements.
- Helper (Optional but Recommended): An extra set of hands can make the process easier and safer.
Step-by-Step Measurement Process
The key to measuring limit straps is to determine the maximum potential travel and then shorten the strap slightly from that point to absorb the force of full extension.
1. Prepare Your SxS
- Lift the Vehicle Safely: Use a floor jack or hoist to lift one corner (or the entire front/rear axle) of your SxS until the wheel is completely off the ground and the suspension is hanging freely, fully extended.
- Secure with Jack Stands: Once lifted, place sturdy jack stands under the frame to ensure the vehicle is stable and safe to work around. Never rely solely on a jack.
2. Identify Mounting Points
- Locate the specific upper and lower points where your limit straps will be mounted. These are typically robust areas on the frame and the suspension arm (e.g., A-arm, trailing arm). Ensure these points are strong enough to handle the forces exerted on the strap.
3. Measure Maximum Suspension Extension (X)
- Measure the Distance Between Your Two Mounting Points: With the suspension fully drooped (shocks fully extended), measure the straight-line distance between your chosen upper and lower mounting points. This is the maximum length your suspension can extend. Let's call this measurement “X”.
4. Calculate Ideal Limit Strap Length
- Apply the Slack Rule: Once you have your "X" measurement, calculate the ideal strap length by subtracting a specific amount of length. A common guideline is to minus 1 inch of length for every 12 inches of the measured “X” length.
Formula:
Ideal Strap Length = X - (X / 12) * 1
Example:
If your measured distance (X) is 24 inches:
Ideal Strap Length = 24 - (24 / 12) * 1
Ideal Strap Length = 24 - 2 * 1
Ideal Strap Length = 24 - 2
Ideal Strap Length = 22 inches
If your measured distance (X) is 30 inches:
Ideal Strap Length = 30 - (30 / 12) * 1
Ideal Strap Length = 30 - 2.5 * 1
Ideal Strap Length = 30 - 2.5
Ideal Strap Length = 27.5 inches
Example Calculation Table
| Measured Distance (X) | Calculation (X - (X/12)*1) | Recommended Strap Length |
|---|---|---|
| 12 inches | 12 - (12/12 * 1) = 11" | 11 inches |
| 24 inches | 24 - (24/12 * 1) = 22" | 22 inches |
| 36 inches | 36 - (36/12 * 1) = 33" | 33 inches |
| 48 inches | 48 - (48/12 * 1) = 44" | 44 inches |
This subtraction ensures that the limit strap is slightly shorter than the maximum extension, allowing it to take the load before your shock fully tops out. This small amount of slack is crucial for the strap to absorb impact effectively without putting undue stress on the shock's internal components.
Important Considerations & Best Practices
- Account for Straps Stretching: New limit straps will stretch slightly over time. The 1 inch per 12 inches rule usually accounts for some initial stretch, but monitoring is key.
- Symmetrical Measurement: Measure each corner of your SxS independently. Don't assume that the front left will be the same as the front right, as slight variances in suspension setup or components can occur.
- Clearance: Ensure the installed straps will not rub against tires, axles, or other suspension components throughout the full range of motion.
- Material Quality: Invest in high-quality limit straps made from durable materials like nylon webbing, designed to withstand the harsh conditions of off-roading.
- Regular Inspection: Periodically inspect your limit straps for any signs of wear, fraying, cuts, or damage. Replace them immediately if you find any issues.
- Installation Hardware: Use appropriate, high-strength mounting hardware (bolts, washers, spacers) specifically designed for limit straps.
By following these steps, you can accurately measure and select the correct limit straps for your SxS, significantly extending the life and performance of your suspension and drivetrain components.
