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The Tire Rack's Tire & Wheel Forum
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Old 08-27-2002, 09:04 AM   #1
eddie@tirerack
Police Officer
 
Join Date: Dec 1969
Location: Indiana
Posts: 919
My Ride: 03 Dodge Intrepid
TEST REVIEW- All Season Sumitomo HTR+

If you live in an area where you need some *light* snow (heavier ammounts need a dedicated winter tire!), then a simple UHP All season fits the bull.. here is a test of the Sumitomo HTR+s we drove on & tested a few weeks back:

Read On..

___________________________________



May, 2002

Tires tested:
Sumitomo HTR+ Ultra High Performance All-Season P225/45R17
Michelin Pilot Sport A/S Ultra High Performance All-Season
P225/45R17
Pirelli P7000 SuperSport Ultra High Performance All-Season
P225/45R17

Vehicles used:
Lexus IS300 sport sedans

The "plus" of Sumitomo HTR+ Ultra High Performance All-Season
tires is their ability to meet the needs of high performance vehicle
drivers who live in areas where winter weather typically consists of
freezing temperatures and occasional light snow.

As a group, Ultra High Performance All-Season tires have the most
difficult performance goals to reach because their tire category's
name "promises" ultra high performance in all seasons. But when
you consider the varying tasks asked of a tire that include providing
traction and performance in spring's rain, summer's heat and
winter's cold, ice, and snow, it's understandable that a blending of
performance capabilities is necessary and that some compromises
have to be made. In the end, how little an All-Season tire
compromises performance during the different weather conditions
ultimately determines how well it serves its driver.

In order to get a better understanding of the performance and
comfort provided by today's Ultra High Performance All-Season
tires, The Tire Rack Team conducted a Ride & Drive comparing the
Sumitomo HTR+ to the Michelin Pilot Sport A/S and Pirelli P7000
SuperSport. We used the 225/45R17-sized tires mounted on
17"x7.0" wheels fitted to three 2001 Lexus IS300 sport sedans
equipped with Eibach Pro-Kit Sport Springs and KONI Sport shock
absorbers.

Sumitomo HTR+

The Sumitomo HTR+ features a High Performance All-Season
tread compound molded into a symmetric tread design to combine
performance with the year-round foul weather traction needed to
meet a wide range of driving conditions. One of the benefits to the
Sumitomo HTR+'s symmetric tread design is that it allows
traditional tire rotation patterns to be used (this promotes even tread
wear and helps prevent tire pattern noise increases that would
accompany uneven tire wear). The HTR+'s tread design is made up
of large, independent shoulder and intermediate tread blocks to
provide dry cornering and stability and a continuous center rib to
sharpen steering response and enhance road feel while helping
reduce tire noise. The tread blocks are separated by sweeping
grooves to enhance wet traction and reduce the risk of
hydroplaning. Full-face, crosscut sipes are engineered into the tread
pattern to provide additional biting edges for light snow traction.

Internally, the HTR+ tire's twin steel belts are reinforced by
JointLess Band (JLB) technology which uses spirally wound nylon
strips above the steel belts to provide long term integrity under high
speed conditions while it reduces weight and helps provide more
uniform ride quality. The HTR+ tires feature sidewalls that resist
lateral deflection to generate cornering force.

One additional feature of Sumitomo HTR+ Ultra High Performance
All-Season tires is their value oriented pricing. Because they are
less expensive than the other two tires in the test confirms that they
provide a lot of all-season performance for the dollar.

On the road, the Sumitomo HTR+ was complimented for its "Real
World" ride comfort qualities along with handling and noise qualities
appropriate for the category.

On The Tire Rack's test track in the dry, the Sumitomo HTR+
provided predictable handling at the limit even though its
responsiveness and traction slightly trailed the capabilities of the
other two tires.

On The Tire Rack's test track in the wet, the Sumitomo HTR+
continued to provide predictable handling at the limit even though its
responsiveness and traction continued to slightly trail the other two
tires.

Michelin Pilot Sport A/S

On the outside, the Pilot Sport A/S features a "three compound
tread" (a high dry grip tread compound in the shoulders; a balanced
dry, wet, snow and cold tread compound between the shoulders
and the tire's center rib; and a wet traction compound in the center
rib). These compounds are molded into a directional tread design
with a continuous circumferential center rib flanked by high angle
directional tread blocks. The continuous center rib sharpens steering
response and provides road feel while reducing tire noise on dry
roads. The high angle lateral tread blocks enhance responsiveness
and handling while the tire's circumferential and high angle lateral
grooves efficiently evacuate water from under the contact patch to
resist hydroplaning and enhance wet traction.

On the inside, two high-tensile, steel cord belts are angled to blend
progressive handling with ride quality. The steel belts are reinforced
with Michelin's "Filament At Zero" (FAZ) technology to further
support the tread area by spiral wrapping an individual strand of
Kevlar across the entire tread area under the steel belts, and then
above the steel belt's outer edges. FAZ technology enhances tire
wear and ride comfort along with predictable handling and high
speed durability.

On the road, the Michelin Pilot Sport A/S was praised for its crisp
"Real World" handling, as well as, providing noise and ride comfort
qualities appropriate for the category.

On The Tire Rack's test track in the dry, the Michelin Pilot Sport A/S
provided good traction, stopping distances and predictable handling.
It was easy to drive at the limit by providing more responsiveness
and crisper handling than was available from the other two tires.

On The Tire Rack's test track in the wet, the Michelin Pilot Sport
A/S provided the traction, stopping distances and predictable
handling necessary for it to turn the fastest lap times of the three
tires in the wet.

Pirelli P7000 SuperSport

The P7000 SuperSport 's twin circumferential grooves flank the
center rib to channel water while additional diagonal and inclined
circumferential grooves further minimize hydroplaning. The
continuous center rib provides constant road contact to enhance
straight-line tracking and dry road response. The tread is molded
out of Pirelli's 100% silica compound with independent shoulder and
intermediate tread blocks to provide enhanced wet traction.

On the inside, the P7000 SuperSport radial features twin steel belts
reinforced by nylon that stabilize the tread area to enhance handling
and high speed durability. The rayon carcass (either one- or
two-ply depending on tire size) uses Kevlar reinforced beads to
provide sharp steering response.

On the road, the Pirelli P7000 SuperSport was complimented for its
"Real World" handling, as well as, noise and ride comfort qualities
appropriate for the category.

On The Tire Rack's test track in the dry, the Pirelli P7000
SuperSport combined good dry traction with fast steering response.
While the P7000 SuperSport was the most difficult tire to drive at
the limit in the dry, it ran the lap times necessary for it to turn the
fastest lap times of the three tires.

On The Tire Rack's test track in the wet, the Pirelli P7000
SuperSport again combined wet traction with fast steering
response. While the P7000 SuperSport was also the most difficult
tire to drive at the limit in the wet, it ran lap times that fell between
the other two tires.

NOTE: Of all of the tires in this test, the Pirelli P7000 SuperSports
requires the most attention to tire rotation and maintaining the
correct tire pressure. Without careful maintenance, the P7000
SuperSport is prone to irregular wear and the resulting noise that
accompanies it.

Additionally, while this evaluation didn't offer our team the
opportunity to compare snow traction, our experience with the Pirelli
P7000 SuperSport in snow indicates that it sacrifices light snow
traction in favor of dry traction and it should only be considered for
areas that receive minimal amounts of light snow.








Test Graphs
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Old 08-27-2002, 01:46 PM   #2
jestr
is bester
 
Join Date: Dec 1969
Location: Seattle
Posts: 1,411
My Ride: '02 Steel Grey 325i
Keep up the good work @ Tire Rack !!
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