Mickey Thompson Street Comp GHT - 245/45R17 95Y STD -277739

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

The Mickey Thompson Street Comp GHT in 245/45R17 (95Y STD) 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 277739, 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)
• 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 245/45R17, 95Y STD

Frequently Asked Questions

The Street Comp GHT is Mickey Thompson's next-generation Ultra Ultra High Performance (UUHP) summer tire, representing a step beyond the original Street Comp. 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. The GHT designation reflects its positioning as the highest-performance street-focused tire in the Street Comp lineup.

Yes. The Street Comp GHT uses a summer compound that is not suitable for use when ambient temperatures are consistently below 45 degrees Fahrenheit. In cold conditions, the compound becomes too rigid for effective traction, which significantly increases stopping distances and reduces grip. If you live in a region with cold winters, these tires should be removed and stored seasonally.

The 245/45R17 95Y STD fits a wide range of performance vehicles equipped with 17-inch wheels requiring a 245 mm section width tire. Common applications include American muscle cars, pony cars, and performance-oriented sports sedans and coupes. Always verify your vehicle's OEM or current rim width and offset before purchasing. The approved rim width range and load index for this specific size are listed in the specifications table above.

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

The Street Comp GHT carries a UTQG rating of 300 AA A. Treadwear 300 indicates a moderate longevity rating suitable for a performance summer tire. Traction AA is the highest traction grade under the UTQG standard, indicating excellent stopping performance on wet asphalt and concrete. Temperature A indicates the highest resistance to heat buildup at sustained high speeds.

The Street Comp GHT is rated Y, which indicates a speed capability exceeding 186 mph. This rating is appropriate for high-performance and supercar applications and provides confidence during spirited street driving and occasional track days. Speed ratings reflect controlled laboratory test conditions and do not constitute a recommendation to exceed posted speed limits.

The Street Comp GHT uses an advanced resin and silica-blended compound. Silica at the molecular level improves the compound's ability to maintain grip at lower and moderate temperatures and enhances water film dispersion across the tread contact patch. Combined with the aggressive asymmetric tread channels that actively evacuate water from under the tire, the GHT is engineered to deliver traction AA level grip on wet roads.

The Street Comp GHT is a DOT-approved street-legal tire and is designed primarily for public road use. It is suitable for occasional performance driving and autocross use as well. For dedicated track use at elevated ambient temperatures, Mickey Thompson offers purpose-built competition tire options designed for sustained high-heat loading cycles.

Store summer tires in a cool, dry, dark location away from ozone sources such as electric motors, generators, and direct sunlight. Tires should be stored upright or stacked horizontally in protective bags. Do not store tires under load or in contact with petroleum-based products. Avoid storing in locations subject to temperature extremes or UV exposure, as these degrade the rubber compound over time.

Installation Instructions

1. Confirm the tire size matches your vehicle's load rating requirements and your wheel diameter and rim width fall within the approved fitment range for this size.
2. Have the tires mounted and balanced by a qualified tire installer using a no-drop-center mounting machine to avoid damage to the bead area.
3. Ensure the asymmetric outside shoulder faces outward as marked on the sidewall before mounting.
4. Inflate to vehicle manufacturer specifications, not to the maximum pressure listed on the tire sidewall.
5. Torque lug nuts to vehicle manufacturer specifications in a star pattern.
6. Perform a slow-speed check for vibration before returning to normal driving speeds.
7. Allow a 500 mile break-in period during which you avoid aggressive acceleration, hard braking, and abrupt cornering to allow the mold release agents on the tread surface to wear off.
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.