Getting the right limit strap length is one of those details that separates a well-built suspension from one that's going to cost you money down the road. Too long and they won't do their job. Too short and you're leaving travel on the table. Here's how to measure limit strap length correctly the first time.

Why Limit Strap Length Matters

Limit straps control how far your suspension can extend on the down stroke. Without them — or with the wrong length — your shocks can overextend, CV joints can pop, and driveshafts can separate. That's expensive damage from a problem that's easy to prevent.

The goal is simple: let your suspension use as much travel as possible while keeping every component within its safe operating range.

What You Need Before You Measure

• A jack and jack stands (or a lift)
• A tape measure
• A helper (optional but makes it easier)
• Knowledge of your shock's maximum extended length

You'll also want to know the maximum safe operating angles for your CV joints or U-joints if you're running independent front suspension or a driveshaft that's close to its limit.

Step-by-Step: How to Measure Limit Strap Length

Step 1: Lift the Vehicle and Let the Suspension Hang

Get the vehicle off the ground so the suspension droops to full extension. If you're measuring one corner at a time, make sure the wheel is completely unloaded and hanging freely.

Step 2: Find Your Maximum Safe Extension

This is the critical step. You need to determine the shortest limit among your components:

• Shocks: Check the manufacturer's spec for maximum extended length. Your strap should stop extension before the shock bottoms out on the down stroke — typically 1/2" to 1" before full extension.
• CV joints / U-joints: If your axle joints reach their angle limit before your shocks max out, that becomes your limiting factor.
• Driveshaft: On solid axle rigs, make sure the driveshaft won't separate at full droop.

Whichever component hits its limit first determines your maximum safe extension point.

Step 3: Measure the Mounting Points

With the suspension at your determined maximum safe extension, measure the distance between your two planned mounting points. This is your target strap length.

Most builders mount limit straps near the shock mounts — either on the axle and frame, or on the control arm and frame. Pick solid mounting points that won't flex or tear under load.

Step 4: Account for Stretch

Here's where people get tripped up. Limit straps stretch under load — typically about 1" per 12" of strap length for standard nylon straps. So an 18" strap might stretch to around 19.5" under full load.

Factor this into your measurement. If your maximum safe distance is 20", you might need an 18" strap to account for stretch under the weight of the axle and wheel assembly.

Step 5: Verify at Ride Height

Once you know your extended length, compress the suspension back to ride height and make sure the strap has enough slack. It should hang loose at ride height and only engage near full droop. If it's taut at ride height, it's too short.

Common Mistakes to Avoid

• Measuring with the wheel on the ground: You need full droop, not ride height.
• Ignoring stretch: All nylon straps elongate under load. Plan for it.
• Using a single strap on heavy axles: Heavy assemblies like full-float axles with big tires may need dual straps per corner.
• Mounting to weak points: Limit straps see serious force. Weld tabs to the frame or axle — don't bolt to sheet metal.

When to Use Adjustable Limit Straps

If you're still dialing in your suspension or plan to change shock lengths later, adjustable limit straps with clevis mounts give you room to fine-tune without buying new straps. They cost a bit more upfront but save time and money during the tuning process.

Getting your limit strap length right protects your investment in shocks, axles, and drivetrain components. Take the time to measure correctly, account for stretch, and mount them to solid points. Your suspension will thank you.

Related Products from Bull Strap

🔗 Shop Bull Strap Limit Straps: Proudly Made in USA with 4130 Chromoly heat-treated end pieces. Available in multiple lengths and configurations.

Frequently Asked Questions

How do you measure for limit straps?

Jack up until wheels hang at full droop. Measure between frame mount and axle mount. That is your limit strap length. Add 1 inch for more travel.

What if limit straps are too short?

Too-short straps restrict travel, reduce ride quality, and stress mount points. Always measure at full droop before ordering.