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The Direzza Sport Z1 Star Spec is Dunlop's Extreme Performance Summer tire developed for serious sports car, sports coupe and performance sedan enthusiasts looking for race tire-like traction on the street or for use in autocross, drifting and track events. The Direzza Sport Z1 Star Spec is for drivers who don’t want to wait as long for their tires to come in during initial runs, as well as drivers of lighter weight vehicles who are often confronted with the task of working tire temperatures up to the point of generating peak grip.
As an evolution of the Direzza Sport Z1 and continuing to use the same tread design, the Direzza Sport Z1 Star Spec tread compound helps provide faster lap times from the start by developing more traction in temperate temperatures along with consistent grip on subsequent laps when the tires are fully warmed up. While this means the Direzza Sport Z1 Star Spec tread compound accommodates a wider operating temperature range than the original Direzza Sport Z1 and reaches its maximum grip level faster, Direzza Sport Z1 Star Spec summer tires are not intended to be driven through snow, on ice or in near-freezing temperatures.
Direzza Sport Z1 Star Spec tires confirm their “Star Spec” identity in the form of a 5-pointed star symbol branded adjacent to the Direzza Sport Z1 name on the sidewall. However, this 5-pointed star should not be confused with the same symbol often branded by tire manufacturers on the sidewalls of Original Equipment tires for BMW vehicles.
The Direzza Sport Z1 Star Spec tread compound is molded into a directional design featuring notched, continuous shoulder ribs, large intermediate shoulder blocks and a wide center rib to deliver consistent contact with the road and enhance grip during cornering. Two wide, circumferential center grooves, wavy shoulder grooves and multiple lateral grooves provide water evacuation to enhance wet traction. The tire's internal structure includes two wide steel belts reinforced by JointLess Band (JLB) Technology spirally wound polyamide to provide strength, uniform ride quality and high-speed capability while steel cord reinforced, 2-ply polyester sidewalls help resist lateral deflection to provide responsive handling and cornering stability.
NOTE: The Tire Rack recommends installing Direzza Sport Z1 Star Spec tires in sets of four to fully realize the benefits of the Star Spec tread compound. While the Direzza Sport Z1 Star Spec can be mixed with its predecessor in axle pairs if necessary, it is recommended that the treads be shaved to the equivalent tread depth of the existing tires.
Author
Blk 91 gt Registered User
Registered: August 2006 Location: Pasadena CA Posts: 19
Review Date: Wed March 18, 2009
Would you recommend the product? Yes |
Price you paid?: $164.00
| Rating: 10
Pros:
Very sticky and predictable. Great for OT and street
Cons:
None, Some say the sidewall is not as stiff as the re070
I love this tire. I have only tried the Re070 and the star spec on my STI so far. I have used at least four or five other tires on my mustang used only for OT and AX. This tire is the stickiest street tire I have tried. It is very predictable. I went with 245-40-17s on the 8 inch STI rim. The fit was great. I could have gone bigger but felt that with the eight inch rim any larger may have resulted in rollover. I just went five 20 minute sessions at Willow Springs on the big track. I had no chunking and they warmed up in one and a half to two laps. I cant say enough about this tire!!!
VRT MBasile VIP Member
Registered: May 2005 Location: photography.mattbasile.net (Sunnyvale, CA) Posts: 18975
Review Date: Sun May 17, 2009
Would you recommend the product? Yes |
Price you paid?: None indicated
| Rating: 9
Pros:
Great grip even at low temps!
Cons:
Noise (not unexpected for this type of tire though)
I too love this tire! It grips fantastically! I haven't auto-x'ed or tracked this tire, but it has performed excellently on the street. Trying to make that quick right on a yellow light? These tires will hold steady, steadier than any other tire I've experienced. I can't wait to get them on the track or to auto-x.
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