Mickey Thompson Street Comp GHT - 315/35R20 110Y XL -277866

Next-Generation Ultra Ultra High Performance Summer Grip for High-Horsepower Builds

The Mickey Thompson Street Comp GHT in 315/35R20 (110Y XL) is built for the demands of high-horsepower American muscle on the street. The Street Comp GHT brings a new tier of Ultra Ultra High Performance (UUHP) engineering to sizes spanning 17 through 20 inches, featuring an advanced resin and silica-blended compound, an aggressive asymmetric tread design, and a lightweight reinforced internal structure engineered for high-speed stability and precision cornering. Material number 277866, the MTT321 series delivers confident grip on both wet and dry pavement without sacrificing street manners.

Key Features

• Ultra Ultra High Performance (UUHP) summer compound engineered for high-horsepower muscle and sports cars
• Advanced resin and silica-blended tread compound for superior wet performance and cornering control
• Aggressive asymmetric tread design channels water away while enhancing dry traction and reducing road noise
• Lightweight construction and aerodynamic profile improves steering response and reduces rotational drag
• Reinforced internal structure for high-speed stability and consistent handling
• UTQG 300 AA A rating
• 10/32 in tread depth for extended usable life
• Black sidewall, radial construction
• Speed rated Y (up to 186 mph)
• Extra Load (XL) rated for higher load capacity
• Summer-only compound: not for use when ambient temperatures are consistently below 45 degrees Fahrenheit

Specifications

What's Included

• 1x Mickey Thompson Street Comp GHT tire, size 315/35R20, 110Y XL

Frequently Asked Questions

The Street Comp GHT is Mickey Thompson's next-generation Ultra Ultra High Performance (UUHP) summer tire. It features an all-new advanced resin and silica-blended compound, a redesigned aggressive asymmetric tread, and a lightweight reinforced internal structure engineered specifically for high-horsepower muscle car and sports car applications.

Yes. The Street Comp GHT uses a summer compound not suitable for use when ambient temperatures are consistently below 45 degrees Fahrenheit. In cold conditions the compound becomes too rigid for effective traction. Remove and store seasonally if you live in a region with cold winters.

The 315/35R20 110Y XL is a wide, low-profile size used on high-horsepower rear-wheel-drive performance cars. Common fitments include the Dodge Challenger Hellcat and Demon rear axle, Shelby GT500 rear, and similar builds where maximum contact patch is a priority. Always verify rim width (typically 10.5 to 11 inches) and offset before purchasing.

Because this tire uses an asymmetric tread design, rotation must be done side-to-side (swapping left and right on the same axle), not front-to-rear, unless your vehicle uses identical sizes front and rear. Always ensure the outside shoulder faces outward as marked.

The Street Comp GHT carries a UTQG rating of 300 AA A. Treadwear 300 is appropriate for a performance summer tire. Traction AA is the highest traction grade under the UTQG standard. Temperature A is the highest resistance to heat buildup at sustained high speeds.

Rated Y, indicating a speed capability exceeding 186 mph. Appropriate for high-performance and supercar applications. Speed ratings reflect controlled laboratory test conditions and do not constitute a recommendation to exceed posted speed limits.

The advanced resin and silica-blended compound improves grip at lower and moderate temperatures and enhances water film dispersion across the contact patch. Combined with aggressive asymmetric tread channels that actively evacuate water, the GHT delivers Traction AA wet grip.

Yes. The Street Comp GHT is a DOT-approved street-legal tire designed primarily for public road use and suitable for occasional autocross. For dedicated track use Mickey Thompson offers purpose-built competition tire options.

Store in a cool, dry, dark location away from ozone sources. Tires should be stored upright or stacked horizontally in protective bags, away from petroleum-based products, UV exposure, and temperature extremes.

Installation Instructions

1. Confirm size, load rating, and rim width fall within the approved fitment range.
2. Have tires mounted and balanced by a qualified installer using a no-drop-center machine.
3. Ensure the asymmetric outside shoulder faces outward as marked.
4. Inflate to vehicle manufacturer specifications, not the maximum pressure on the sidewall.
5. Torque lug nuts to spec in a star pattern.
6. Check for vibration at low speed before returning to normal driving.
7. Allow a 500 mile break-in period avoiding aggressive inputs to clear mold release agents.
8. Recheck tire pressure after the first 50 miles and monthly thereafter.

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.