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Eight-Spoke American Muscle Built for Modern GM Trucks
The Mickey Thompson MTT226100478 Classic III is a 17x12-inch cast aluminum wheel engineered around the 8x180mm bolt pattern with 4.25 inches of backspace. The MTT226100478 brings the legendary Classic III 8-hole spoke design to newer-generation GM full-size trucks, delivering a brilliant polished finish with matching polished hand holes and the embossed M/T logo as a mark of genuine Mickey Thompson quality. With a 12-inch width and 4.25-inch backspace, the MTT226100478 is built for full-size truck owners who want the most aggressive stance possible while running one of the most iconic wheel designs in American truck culture.
Key Features
- Classic 8-hole spoke design in brilliant polished finish with matching polished hand holes
- 17x12-inch size delivers a bold, aggressive width for full-size GM trucks
- 8x180mm bolt pattern fits 2019 and newer Chevy Silverado 1500 and GMC Sierra 1500 models
- 4.25-inch backspace positions the wheel outboard for maximum poke and stance
- Cast aluminum construction provides strength and a clean one-piece appearance
- Non-corrosive screw-on center cap included
- Embossed M/T logo confirms genuine Mickey Thompson quality
- Requires 60-degree bulge acorn (cone bulge) seat lug nuts
- Not suitable for 2022 and newer Toyota Tundra models due to insufficient fastener thread engagement
Specifications
| Detail | Value |
|---|---|
| Part Number | MTT226100478 / 226100478 |
| Brand | Mickey Thompson |
| Material Number | 277012 |
| Wheel Diameter | 17 in |
| Wheel Width | 12 in |
| Bolt Pattern | 8x180mm |
| Backspace | 4.25 in |
| Construction | Cast Aluminum Monoblock |
| Finish | Polished |
| Hub Bore | 124.1 mm |
| Lug Seat Type | 60-Degree Bulge Acorn (Cone Bulge) |
| Number of Lugs | 8 |
| Load Rating | 3,250 lbs per wheel |
| Finish Warranty | 3 Years |
| Fitment | Universal (8x180mm bolt pattern) |
| UPC | 787025476179 |
What's Included
- 1x Mickey Thompson MTT226100478 Classic III 17x12in polished wheel (8x180mm BP, 4.25in BS)
- Non-corrosive screw-on center cap
Frequently Asked Questions
What trucks does the MTT226100478 Classic III 8x180mm fit?The MTT226100478 uses an 8x180mm bolt pattern, which is the factory bolt pattern on 2019 and newer Chevrolet Silverado 1500, 2019 and newer GMC Sierra 1500, and select other newer-generation GM full-size trucks. Always verify bolt pattern, hub bore, and caliper and fender clearance for your specific year, make, model, and trim before purchasing.
What lug nuts are required for the MTT226100478?All Mickey Thompson Classic Series wheels require 60-degree bulge acorn (cone bulge) seat lug nuts. Standard conical seat lug nuts are not compatible. For vehicles with a GVWR of 6,500 lbs or greater, Mickey Thompson recommends duplex bulge acorn lug nuts.
Is the MTT226100478 compatible with 2022 and newer Toyota Tundra models?No. Mickey Thompson specifies that Classic Series wheels are not suitable for 2022 and newer Toyota Tundra models due to insufficient fastener thread engagement. Do not install this wheel on a 2022 or newer Tundra.
What is the offset of the MTT226100478?With 4.25 inches of backspace on a 12-inch wide wheel, the MTT226100478 has an approximate offset of -38.1mm. This aggressive negative offset pushes the wheel face outward, creating a wide and assertive stance typical of lifted and performance-oriented truck builds.
Does the 8x180mm bolt pattern on the MTT226100478 also fit older GM trucks?No. The 8x180mm pattern was introduced by GM beginning with the 2019 Silverado and Sierra 1500 lineup. Older GM trucks used the 8x165.1mm (8x6.5in) bolt pattern. The two patterns are not interchangeable. Use part number MTT226100476 if you have an older 8x6.5 GM truck.
Does the MTT226100478 require hub-centric rings?The MTT226100478 has a 124.1mm hub bore. If your vehicle has a smaller hub bore, hub-centric rings of the appropriate diameter are required to prevent vibration and ensure proper centering. Check your factory hub bore specification before ordering.
Can I run the MTT226100478 on a dually?The Classic III 17x12 is not designed for dually rear axle configurations. It is intended for single-rear-wheel trucks and SUVs only. Always verify caliper, fender, and suspension clearances before installation.
What finish warranty comes with the MTT226100478?The MTT226100478 carries a 3-year finish warranty from Mickey Thompson covering defects in the polished finish under normal use conditions and with proper wheel maintenance.
How aggressive is the 4.25-inch backspace on a 17x12 wheel?On a 17x12 wheel, 4.25 inches of backspace places the mounting face well inside the wheel, pushing the outer lip far beyond the hub face. This results in a significant outboard stance, typically requiring a lift kit or leveling kit and potentially fender modifications depending on the vehicle. Always test-fit before completing any installation.
Installation Notes
- Confirm the 8x180mm bolt pattern and 124.1mm hub bore match your specific vehicle before mounting.
- Use only 60-degree bulge acorn (cone bulge) seat lug nuts; standard conical lug nuts are not compatible.
- Install hub-centric rings if your vehicle hub bore is smaller than 124.1mm.
- Mount the wheel by hand-threading all lug nuts before applying torque.
- Torque lug nuts to manufacturer specification in a cross-pattern sequence.
- Re-torque lug nuts after 50 to 100 miles of initial use.
- Check clearances between the wheel, brake caliper, inner fender, and suspension at full jounce and full lock before driving.
WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.
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