What is a Body Mount Chop (BMC) and Why is it Needed?
If you’re lifting your Toyota Tacoma, 4Runner, or Tundra and upgrading to larger tires, you’ve likely heard the term Body Mount Chop (or BMC). But what exactly is a BMC, and why is it important?
A Body Mount Chop is a modification that trims and reshapes the front body mounts on your Toyota truck or SUV. These mounts are located just behind the front wheels and can cause tire rubbing when installing larger tires, especially when turning at full lock or flexing the suspension off-road. Without a Body Mount Chop, your new tires could scrape against the mounts, leading to damage or even unsafe driving conditions.
At RSG Offroad, we specialize in precision Body Mount Chops that allow for maximum tire clearance without compromising the structural integrity of your vehicle. If you're serious about running 33s, 35s, or larger tires on your Toyota, a professional BMC is an essential step for safe and effective off-roading.
Why Should You Get a Body Mount Chop?
- Prevent Tire Rubbing: Eliminate interference during turns and suspension articulation.
- Allow for Larger Tires: Safely fit 33" to 35" tires on lifted Toyotas without sacrificing performance.
- Protect Structural Integrity: Professional BMCs reinforce and re-weld the area to maintain strength.
- Clean, Professional Finish: Avoid hacked or DIY jobs that can weaken your frame and invite corrosion.
- Boost Off-Road Capability: Enjoy full suspension articulation and improved off-road performance without clearance issues.
A Body Mount Chop isn’t just about looks — it’s a functional, safety-enhancing upgrade when upsizing your wheels and tires.
How We Perform Body Mount Chops at RSG Offroad
When you bring your Toyota to RSG Offroad for a Body Mount Chop, you're trusting true professionals with years of experience in this critical modification. Here's our process:
-
Consultation and Planning:
We inspect your lift setup, tire size, and intended use to ensure a BMC is the right solution. -
Precision Cutting:
We carefully cut back the factory body mount, only removing the necessary material to maximize clearance without overcutting. -
Reinforcement and Welding:
After cutting, we fabricate and weld a new plate over the trimmed area to reinforce strength and durability. -
Sealing and Finishing:
Every BMC job is sealed and coated against corrosion for a factory-fresh, long-lasting result. -
Test Fitment:
We confirm full tire clearance at full steering lock, ensuring your rig is trail-ready.
Our process results in clean, strong, and reliable Body Mount Chops that allow your 4x4 to perform without restrictions.
Do You Always Need a Body Mount Chop for Larger Tires?
Not every tire upgrade requires a BMC, but here’s when you likely will:
-
You’re running tires larger than 32” (especially 33s, 34s, or 35s).
-
You’ve installed an aftermarket suspension lift or leveling kit.
-
You notice rubbing at full steering lock, even with trimming of fender liners.
If you're unsure, our team can inspect your setup and let you know whether a Body Mount Chop is needed to clear your tires properly.
Common Questions About Body Mount Chops
Is a Body Mount Chop safe?
When performed professionally, yes. At RSG Offroad, we reinforce and weld the trimmed mount, ensuring your truck retains full structural integrity.
Can I do a Body Mount Chop myself?
While DIY is possible, it’s not recommended unless you have welding experience and understand load-bearing structures. An improperly performed BMC can weaken your frame or cause corrosion issues down the line.
Does a BMC affect my warranty?
Some factory warranties may not cover modified body mounts. However, most off-road builds already involve lifts and tire upgrades that technically alter OEM specs. We recommend consulting your dealership if you’re concerned.