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SumitomoHTR Z5
  • SumitomoHTR Z5
  • SumitomoHTR Z5
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The HTR Z5 is Sumitomo's Ultra High Performance Summer tire designed for the drivers of sports cars, sporty coupes and performance sedans looking for responsive high-speed handling and reliable traction in warm, dry and wet conditions. Like all Ultra High Performance Summer tires, the HTR Z5 is not intended to be serviced, stored nor driven in near- and below-freezing temperatures, through snow or on ice.

An aggressive, summer compound is molded into the HTR Z5's asymmetric, five-rib tread pattern. A continuous center rib aids stability and improves steering response, while the substantial shoulders improve lateral grip. Notches in the intermediate and center ribs combine with the tread compound for traction in wet conditions, and the four wide, circumferential grooves and lateral shoulder grooves evacuate standing water from the footprint for hydroplaning resistance.

The internal construction of the HTR Z5 consists of a two-ply, polyester casing supporting two high-rigidity steel belts. A full-width, nylon reinforcement ply improves high-speed stability, and a high-modulus bead insert strengthens the sidewall to aid handling.

Note:Tires exposed to temperatures of 20 degrees F (-7 degrees C) or lower must be permitted to gradually return to temperatures of at least 40 degrees F (5 degrees C) for at least 24 hours before they are flexed in any manner, such as by adjusting inflation pressures, mounting them on wheels or using them to support, roll or drive a vehicle.

Flexing of the specialized rubber compounds used in Ultra High Performance Summer tires during cold-weather use can result in irreversible compound cracking. Compound cracking is not a warrantable condition because it occurs as the result of improper use or storage. Tires exhibiting compound cracking must be replaced.

Tire Rack Test Results Sumitomo HTR Z5

Ultra High Performance vs. Max Performance Summer Tires – 2025 Test 3(27:40)

When these two wildly popular summer performance categories go head-to-head, it gives us a deeper look into what truly separates them. That helps you find the best tire for what you prioritize, whether that be on-road comfort with sporty handling or if you’ll trade off some manners for even more handling. In a packed field, with new products and first-time tires in our revamped testing platform, there were sure to be some surprises…and there were! And as always starting in 2025, you’ll see last year’s results added into the mix to see where they all stand.

Read the Full Test Report

Ratings Charts & Reviews Sumitomo HTR Z5

Tire Category: Ultra High Performance Summer

Consumer Surveys

 
Best in Category
Miles Reported
Recommended
Treadwear
Sumitomo HTR Z5
Good
96%
837K
8.0 - Good
8.1 - Good
8.2 Hydroplaning Resistance
8.1 Wet Traction
8.6 - Excellent
8.6 Corner Stability
8.8 Dry Traction
8.6 Steering Response
N/A
N/A Light Snow Traction
N/A Deep Snow Traction
N/A Ice Traction
8.4 - Good
8.5 Ride Quality
8.4 Noise
8.0 - Good

Consumer Reviews

Media Gallery

Ultra High Performance vs. Max Performance Summer Tires – 2025 Test 3(27:40)

When these two wildly popular summer performance categories go head-to-head, it gives us a deeper look into what truly separates them. That helps you find the best tire for what you prioritize, whether that be on-road comfort with sporty handling or if you’ll trade off some manners for even more handling. In a packed field, with new products and first-time tires in our revamped testing platform, there were sure to be some surprises…and there were! And as always starting in 2025, you’ll see last year’s results added into the mix to see where they all stand.

Read the Full Test Report

Testing Two Ultra High Performance Summer Tires 2019: Sumitomo HTR Z5(01:40)

Sumitomo recently released the HTR Z5 to continue the popular “HTR Z” line. We tested it to find out how this new player compares to some of the best in the Ultra High Performance Summer category.

Read the Full Test Report

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