ZY WHEEL 1" Wheel Spacers 6x5.5/6x139.7 (4pcs) — 78.1mm Hub Bore, M14x1.5 Studs, CNC Forged 6061-T6

ZY WHEEL 1-inch wheel spacer set: four CNC-forged 6061-T6 aluminum spacers, 6x5.5/6x139.7 bolt pattern, 78.1mm hub bore, M14x1.5 studs — designed to push wheels outward for a wider stance and improved fitment.

These ZY WHEEL spacers are made to adapt factory wheels and aftermarket rims to modern GM 6-lug trucks and full-size SUVs. Machined from aerospace-grade 6061 T6 forged aluminum, the set includes four 1" (25mm) spacers with a 78.1mm hub bore and M14x1.5 stud thread pitch, engineered to keep a precise fit while widening track width for clearance, aesthetic, or handling reasons. Installation instructions are included; light modifications to lug studs may be required on some vehicles.

Will these spacers fit my Chevy Silverado or GMC Sierra?

Compatibility covers many GM 6-lug models across multiple years, but always verify your vehicle's bolt pattern and hub bore before purchasing. These spacers use a 6x5.5 (6x139.7) bolt pattern and a 78.1mm hub bore, matching the common specifications on numerous Silverado, Sierra, Tahoe, Yukon and Escalade models.

• Bolt pattern: 6x5.5 / 6x139.7
• Hub bore: 78.1mm — hub-centric fit for many GM vehicles
• Thread pitch: M14 x 1.5 for studs and lug nuts
• Spacer thickness: 1" (25mm)

How do these spacers change handling and wheel fitment?

By increasing the track width, the spacers shift the wheel flange outward, which can improve visual stance and help clear brake calipers, suspension components, or aftermarket wheels. The wider track can also alter handling characteristics slightly by modifying scrub radius and lateral load distribution.

• Creates a more aggressive, flush wheel appearance
• Helps clear aftermarket wheels or larger brake hardware
• May slightly adjust steering feel and stability at speed
• Hub-centric design minimizes vibration when matched correctly

What are these made of and why does that matter?

ZY WHEEL spacers are CNC-machined from forged 6061-T6 aluminum, an alloy commonly used in aerospace and performance applications. Forging and precision machining produce uniform thickness, concentricity, and strength while keeping weight down compared with steel alternatives.

• 6061-T6 forged aluminum — high strength-to-weight ratio
• CNC machining for accurate bolt patterns and hub bores
• Corrosion-resistant finish for longevity in road conditions
• Lower unsprung weight than equivalent steel spacers

Is installation difficult and are any modifications needed?

Installation is straightforward for someone familiar with wheel removal and torque procedures, but it requires correct tightening sequence and torque specifications. Because these spacers are only 1" thick, some vehicles may need minor lug stud trimming or aftermarket extended studs depending on wheel and lug nut clearance.

• Includes set of 4 spacers and installation instructions
• Use proper torque and re-torque after test drive
• Some models may require cutting or using longer studs for full thread engagement
• Contact ZY WHEEL support via email for fitment help

Who is this for: ZY WHEEL 1" spacers suit owners of late-model GM 6-lug trucks and SUVs who want a wider, more aggressive wheel position, need extra clearance for aftermarket wheels or brakes, or prefer a specific fitment without changing offset. They are aimed at DIYers and professional installers comfortable with wheel removal and proper torque procedures who will verify bolt pattern and hub bore before installing.