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<font face="tahoma" color="red" size="+2"><b>
<b>What tires should I buy for my SHO?</b></font></b>

</b></font><hr>
<p>This is probably the most frequently asked question on the mailing list.
This is partially because the "performance" tires used on a car like the
SHO rarely last longer than 30,000 miles, and it is difficult to find a
magazine tire test that covers the tires of interest in the correct size.
The majority opinion seems to be to stay away from the OEM Goodyear Eagle
GT+4's; their treadlife is quite short and IMO they're pretty scary in
wet weather. The Eagle GA's fitted to the early automatic cars are somewhat
quieter and smoother riding, but don't last much longer and are just as
bad in the wet. When ordering tires, you will need to ensure that
<ol type="1">
<li>
the tires fit inside the wheel wells--in practice, that generally means
225 max tread width on all but '89-'91's with 16" rims, and</li>

<li>
the outside diameter is approximately the same as OEM to ensure proper
function of the antilock brakes. You can figure the outside diameter by
the following formula:</li>

<p><br>OD = 2 * (Tread width, mm) * (Aspect ratio) + ([Wheel size, in]
* 25.4)
<p>For example, the 215/65R15 size gives OD = 2*215*0.65 + (15*25.4) =
660.5 mm. Replacing this tire with a 225/60R15 would give 651 mm, which
is close enough to work according to most tire dealers I have talked to.</ol>
<a href="tiresize.html" rel="SUBDOCUMENT">Tire Sizes Explained</a>
<p>Here are some popular alternatives, with sizes, price estimate and previous
SHOtimes comments. Some of these are based on single recommendations posted,
and I have noted these where I remember them. Keep in mind that SHOtimes
membership is scattered across the USA and local driving conditions vary
a lot, so you should apply your own judgment. (note: some exist in H-ratings
but are not listed here--check your tire dealer)
<p>Also bear in mind that not all tires of a given size (225/60R16, for
instance) are dimensionally the same. One manufacturer's 225 may fit, while
another's will not. At least one SHOtimes subscriber had a set of tires
that seemed to fit but when heated up became large enough to rub on the
coil plate in the rear. He ended up buying two sets of tires in a very
short time period.
<p>
<a target="_blank" href="http://service.bfast.com/bfast/click?bfmid=37919709&siteid=39253888&bfpage=tires">The Tire Rack</a> has an excellent
site online that allows you to browse their selection of tires by size,
type, or brand.
<br>&nbsp;
<table cellpadding="3" BORDER CELLPADDING=5 >
<tr>
<td valign=top>
<h3>
<img SRC="logos/bfg.gif" ALT="BFGoodrich" height=50 width=333 align=TOP></h3>
</td>

<td valign=top></td>
</tr>

<tr VALIGN=TOP>
<td valign="center"><font size=+1>Comp T/A VR4, ZR4 all-season</font></td>

<td valign="center">225/60VR15, 215/60VR16, 225/55VR16, 225/55ZR16&nbsp;
<p>$100-125&nbsp;
<p>Comments, Rumors and Hearsay: A longtime favorite (though not nearly-
unanimous as it once was). 215/65VR15 seems to have been discontinued.
Good wet handling, though one SHOtimer with the H-rated variety reported
very serious loss of traction in winter conditions. Another reports excellent
winter traction. Good treadlife (maybe 40% more than GT+4's).
<p>From Steve Reynolds :
<p>Comparing the Comp T/A vs the stock GT+4 tires I observed the following.
<p>In snow the VR4 has better acceleration and braking than the GT+4s.&nbsp;
In cornering however the GT+4 were better.&nbsp; I've had the tail come
out several times (traveling on straight roads) with the VR4s but I never
experienced that with the GT+4s.
<p>In the dry the GT+4s would brake at a maximium of .96Gs while the GT+4s
with only brake at a maximum of .91Gs (using a G-Tech PRO).&nbsp; The maximum
cornering force I recorded with the GT+4s was .89 Gs while I read .99Gs
several times with the VR4s.&nbsp; This comparison may be biased agaist
the GT+4s because the VR4s readings were obtained during an autocross.
<p>Both tires seem about equal in the rain and noise level.&nbsp; The VR4s
are a little softer riding over sharp bumps such as tar strips.
<p>Both tires were 215/60 16".&nbsp; The VR4s appear to be wearing slower
than the GT+4s.&nbsp; The GT+4 would wear the centers out regardless of
tire pressure where the Comp T/A tend to be more even with more outside
tire edge wear (from hard cornering). The GT+4s would chunk when autocrossed.&nbsp;
The VR4s do not.&nbsp; I've never had the out of round symptoms with the
VR4s or ZRs but I did have a problem about 10 years ago with a VR (earlier
generation) on a different car.</td>
</tr>

<tr>
<td valign=top>
<h3>
<font size=+1>Touring T/A</font></h3>
</td>

<td valign=top>CR&amp;H: I have 21000 on a set of BF Goodrich Touring T/A.
They are H speed rated not V or Z. They seem to handle pretty well in the
wet and dry. However we do not get much snow in central Florida so I can't
advise how they work in that condition. As far as tread life they seem
to be lasting and look like they will for a while longer. I forget what
the tread life warranty is. 40000 or 50000. They are also quiet at legal
and higher highway speeds. They were also reasonably priced.</td>
</tr>

<tr>
<td valign=top>
<h3>
<font size=+1>R1</font></h3>
</td>

<td valign=top>245/45-16&nbsp;
<p>CR&amp;H: Yee Ha, 0.9G measured on the dry skidpad, turns-in yesterday.
Drive thru a shallow puddle, car spins.</td>
</tr>

<tr>
<td valign=top>
<h2>
<font size=+2>Bridgestone</font></h2>
</td>

<td valign=top>&nbsp;</td>
</tr>

<tr>
<td valign=top><font size=+1>RE71</font></td>

<td valign=top>235/45-17&nbsp;
<p>CR&amp;H: This is a fantastic wet and dry tire, good tread wear too,
the fronts were only half gone after the 4300 miles of One Lap. ;-) Had
our first significant snow of the season this week, pins and needles again,
gotta' get the VR-4's back on for Winter.</td>
</tr>

<tr>
<td valign=top><font size=+1>RE940</font></td>

<td valign=top>215/65VR15, 225/60VR15 $100-$125&nbsp;
<p>CR&amp;H: Bridgestone's top performance all-season tire, with an asymmetrical
tread pattern. Compared to the GT+4, more comfortable and quieter ride,
and provides sharper turn-in and steering response, with apparently better
grip. Better traction in rain seems better, and in snow (Western Canada
winter) seems much better than the GT+4. Tread life looks to be similar
to GT+4.</td>
</tr>

<tr>
<td valign=top><img SRC="logos/dun.gif" width="322" height="54"></td>

<td valign=top>&nbsp;</td>
</tr>

<tr>
<td valign=top>
<h3>
<b><font size=+1><a href="http://www.insv.com/dunlop/tires/D40_M2.html" target="blank">D40M2</a></font></b></h3>
</td>

<td valign=top>225/60ZR15, 225/55ZR16 $110-$130&nbsp;
<p>CR&amp;H: Quiet, smooth, good autocrossing tires (one recommendation
known of).</td>
</tr>

<tr>
<td valign=top>
<h3>
<font size=+1>D60A2 all-season</font></h3>
</td>

<td valign=top>215/65R15 $70 or so&nbsp;
<p>CR&amp;H: Excellent overall performer, especially in heavy rain. Rated
for 50,000 miles, so when they wear out at 25,000 get a new set at half
the price.</td>
</tr>

<tr>
<td valign=top>
<h3>
<font size=+1>D80V4 all-season</font></h3>
</td>

<td valign=top>215/65VR15 $110-120&nbsp;
<p>CR&amp;H: Much better than GT+4's in wet handling &amp; noise level.
Hard to find. OEM on Infiniti Q45.</td>
</tr>

<tr>
<td valign=top>
<h3>
<font size=+1>SP Sport 4000 All Season</font></h3>
</td>

<td valign=top>225/60ZR15, 215/60VR16, 225/55ZR16 ~$120 VR, $140-165 ZR&nbsp;
<p>CR&amp;H: Much better than the GT+4's in wet, dry, and snowy conditions.
Also quieter, but with a noticably stiffer ride. Lateral handling is so
much better than the OE tires that I've now noticed some negative handling
characteristics (rear end jacking) from the SHO that I never uncovered
before.&nbsp;
<p>From William Lorman:
<blockquote>Today was another day in snow w/SP4000's. The original GT+4
tires had more bite in deeper snow. In general the SP4000's are just fine.
Compared to original GT+4's, they make less noise, stick to pavement under
most circumstances, and do a better job in rain. Considering there's no
place for speed in snow storm weather I can live with that.&nbsp;
<p>Part of my choosing the Dunlop models was the number of you who said
they were quiter and age better than the BFG tires. Don't take this as
a "stay away from the SP4000" message, but food for thought if snow performance
is important. A friend who changes his Pirelli P4000's with Bridgestone
Blizzak models in winter says that is the ultimate solution.&nbsp;</blockquote>
</td>
</tr>

<tr>
<td valign=top>
<h3>
<b><font size=+1><a href="http://www.insv.com/dunlop/tires/SP_8000.html" target="blank">SP
Sport 8000</a></font></b></h3>
</td>

<td valign=top>225/50ZR16 ~$165&nbsp;
<p>CR&amp;H: According to autocrossers in NESHOC, the tire to go with for
serious fair-weather driving. OK in wet, not for winter.</td>
</tr>

<tr>
<td valign=top>
<h2>
<font size=+2>Falken</font></h2>
</td>

<td valign=top>Heard fair to good reports from Mustang owners, but one
SHOtimes report that the 225's have too much side-to-side play on the 6"
stock rims.</td>
</tr>

<tr>
<td valign=top>
<h2>
Firestone</h2>
</td>

<td valign=top>&nbsp;</td>
</tr>

<tr>
<td valign=top>
<h3>
SZ50</h3>
</td>

<td valign=top>CR&amp;H: Many rave reviews from owners. Here are some pictures:&nbsp;
<p><a href="images/tires/sz501.jpg">sz501.jpg</a>
<br><a href="images/tires/sz502.jpg">sz502.jpg</a>
<br><a href="images/tires/sz503.jpg">sz503.jpg</a></td>
</tr>

<tr>
<td valign=top>
<h2>
<font size=+2>General Tire</font></h2>
</td>

<td valign=top>&nbsp;</td>
</tr>

<tr>
<td valign=top>&nbsp;</td>

<td valign=top>CR&amp;H: [Ed: Avoid. Consistently trails the pack in magazine
tests, and an acquaintance of mine is very unhappy with the Generals on
her '92. Cheap, but you get what you pay for.]</td>
</tr>

<tr>
<td valign="center"><img SRC="logos/Goodyear.gif" ALT="Goodyear" align=TOP width="324" height="41"></td>

<td valign="center">&nbsp;</td>
</tr>

<tr>
<td valign=top>
<h3>
<font size=+1>Eagle Aquatred</font></h3>
</td>

<td valign=top>Karl Salnoske:&nbsp;
<p>I'm running the Eagle Aquatred 215/60/16. I've got 12K miles on them
and can say that they are exceptional in rain and snow and get better wear
than the Eagle GT's that were OEM on the car. I don't believe they have
the grip of the GTs in the dry although I don't have any numbers to back
this up. They just seem to break away a little earlier on some of the interstate
ramps I use as a test track. They seem to be about the same as the GTs
in terms of road noise and harshness (both okay).</td>
</tr>

<tr>
<td valign=top>
<h3>
Eagle GA</h3>
</td>

<td valign=top>Standard Equipment on some automatics '93 to '95.&nbsp;
<p>CR&amp;H: very quiet and smooth, but suffer from extremely poor wet-weather
<br>traction and a somewhat disconnected feel.</td>
</tr>

<tr>
<td valign=top>
<h2>
<font size=+2>Kelly Springfield</font></h2>
</td>

<td valign=top>&nbsp;</td>
</tr>

<tr>
<td valign=top>
<h3>
<font size=+1>Charger VR-4</font></h3>
</td>

<td valign=top>CR&amp;H: Similar dry performance to the Eagles, better
tread life (about 20,000 mi per set). Not great in the snow.</td>
</tr>

<tr>
<td valign=top><img SRC="logos/Michelin.gif" ALT="Michelin" align=TOP width="324" height="55"></td>

<td valign=top>&nbsp;</td>
</tr>

<tr>
<td valign=top>
<h3>
Energy MXV4</h3>
</td>

<td valign=top>All-season. 225/60R16 does not fit when warmed up.</td>
</tr>

<tr>
<td valign=top>
<h3>
<b><font size=+1><a href="http://www.michelin.com/us/eng/tire/catalog/xgtv.htm" target="blank">Michelin
Sport XGT V, XGT V4</a></font></b></h3>
</td>

<td valign=top>All-season
<br>215/65VR15, 225/60VR15, 225/55ZR16 (XGTV)
<br>$125-150&nbsp;
<p>CR&amp;H: Noisy, stiffer ride than GT+4, but good dry &amp; wet handling.
[At least one netter disagrees with me, calling the V4 'absolutely terrifying
in rain' based on experience with a Dodge Spirit R/T.] V4 good on ice &amp;
snow. Tends to follow grooves in pavement. Expensive (I only have them
'cuz I got a special deal when the local NTW screwed up my Pirelli order).
Treadlife only slightly longer than OEM. One (mine!) recommendation.&nbsp;
<p>Another netter reports good results after 20k miles. Expects to get
40k out of them with frequent (2-3k miles) rotation.&nbsp;
<p>Re: XGTV (215/65VR15) awful rain tires, smooth ride even at 40psi, quiet,
good snow experience (only once, though), poor steering response and OK
grip, stayed balanced, 40,000+ miles: Liked 'em.&nbsp;
<p>One more opinion on the XGT V4 (215/60R16 95V): Wet handling is MUCH
improved as compared with the Goodyear Eagle GT+4, and road noise is virtually
nil. Cornering is also much better. Interestingly, Motor Trend did a article
in November 1995 on this tire, comparing it favorably with another Michelin
model, a pure performance tire. Granted, the Goodyears were about gone,
so anything would have been an improvement.</td>
</tr>

<tr>
<td valign=top><img SRC="logos/Pirelli.gif" ALT="Pirelli" align=TOP width="324" height="73"></td>

<td valign=top>&nbsp;</td>
</tr>

<tr>
<td valign=top>
<h3>
<font size=+1>P4000 Super Touring</font></h3>
</td>

<td valign=top>215/65VR15, 225/60VR15, $100-125&nbsp;
<p>CR&amp;H: Much superior to GT+4's in noise, dry &amp; especially wet
traction, though perhaps too much give at the ragged edge. These are new
in the past year or so and have gotten lots of good press.&nbsp;
<p>215/60HR15&nbsp;
<p>CR&amp;H: Softer ride than OEMs, better in wet and snow, but lack rigidity
in sidewall. Steering feels vague.</td>
</tr>

<tr>
<td valign=top>
<h2>
<font size=+2>Toyo</font></h2>
</td>

<td valign=top>&nbsp;</td>
</tr>

<tr>
<td valign=top>
<h3>
F600</h3>
</td>

<td valign=top>225/60ZR15&nbsp;
<p>CR&amp;H: Don't know much apart from less wheelspin than GT+4's.</td>
</tr>

<tr>
<td valign=top>
<h3>
<font size=+1>Proxes Z-1</font></h3>
</td>

<td valign=top>215/60ZR16, others?&nbsp;
<p>CR&amp;H: Two recommendations, better ride, lower noise than GT+4's,
better handling.</td>
</tr>

<tr>
<td valign=top><img SRC="logos/Yokohama.gif" ALT="Yokohama" align=TOP width="324" height="59"></td>

<td valign=top>&nbsp;</td>
</tr>

<tr>
<td valign=top>
<h3>
<font size=+1>A008</font></h3>
</td>

<td valign=top>225/50ZR16 [Ed: OD much smaller than stock, will it throw
off ABS?]
<br>Price about $185&nbsp;
<p>CR&amp;H: Street legal slicks, with just enough tread to pass inspection.
*The* tire for autocrossing. Could be a handful in the wet, and forget
snow or ice.</td>
</tr>

<tr>
<td valign=top>
<h3>
<font size=+1>A509</font></h3>
</td>

<td valign=top>215/65VR15, 225/60VR15, 215/60VR16 $85-100&nbsp;
<p>CR&amp;H: Two enthusiastic recommendations--better grip than OEM, good
wet traction, low price, quiet ride. One recommender reported 36,000 mile
treadlife.</td>
</tr>

<tr VALIGN=TOP>
<td valign="center">
<h3>
A540</h3>
</td>

<td valign="center">225/55/16
<p>CR&amp;H : I have to take them off now because I overheated the outside
sidewalls with my "performance driving".&nbsp; They roll-under/ tuck-in
in curves, and are now practically 'shot'.&nbsp;&nbsp; This after only
7000 mls.&nbsp; The tires were riding very good, traction, handling, etc.
everything, but
<br>the soft sidewalls DO NOT stand up to high performance driving.
<br>&nbsp;</td>
</tr>

<tr>
<td valign=top>
<h3>
<font size=+1>AVS Intermediate</font></h3>
</td>

<td valign=top>215/65ZR15 $110-$130&nbsp;
<p>CR&amp;H: EXCELLENT steering response, EXCELLENT grip, ride worse than
Michelins. About as noisy as the OEM Goodyears.</td>
</tr>

<tr>
<td valign=top>
<h3>
<font size=+1>AVS U+4</font></h3>
</td>

<td valign=top>215/65VR15, 225/60VR15, 215/60VR16 $85-100&nbsp;
<p>CR&amp;H: I had 215/65VR15 of these. Very good ride. Mediocre straight-line
traction. Good braking traction. Very good lateral traction. Mediocre wet
traction. OK snow traction, but these aren't snow tires. Nice crisp turn-in.
I got less than 20k miles out of mine. Downright scary in winter after
10k miles; OK when new. (Mike Schwartz)</td>
</tr>

<tr>
<td valign=top>
<h3>
<font size=+1>S4-V</font></h3>
</td>

<td valign=top>215/65VR15 $85-90&nbsp;
<p>CR&amp;H: I now have these. In almost every way superior to AVS U+4
except for turn-in response. Incredible wet traction; feels like the road
is dry.</td>
</tr>
</table>

<h2>
<b>Tire Size Notes</b></h2>
The 215/65R15 or 215/60R16 tire size is a bit difficult to find in some
areas. Some owners have reported good results switching to 225/60R15's
or 225/55R16's respectively, while others have reported that this size
won't clear the rear fenders. So far as I can tell, the lowdown is:
<br>&nbsp;
<table cellpadding="3" BORDER=2 >
<tr>
<td valign="center" ALIGN=CENTER VALIGN=TOP><b>Model Years</b></td>

<td valign="center" ALIGN=CENTER VALIGN=TOP><b>Rule of Thumb</b></td>
</tr>

<tr>
<td valign="center" ALIGN=CENTER VALIGN=TOP><b>'89 - '91</b></td>

<td valign=top>225/60R15 fits; 225/55R16 may rub rear fenders</td>
</tr>

<tr>
<td valign="center" ALIGN=CENTER VALIGN=TOP><b>'92 - '95</b></td>

<td valign=top>Bigger rear fender cutouts; 225's reportedly OK, in use
by several members of NESHOC.</td>
</tr>
</table>

<p>Finally, the 225's in some brands may be marginally too wide with the
factory 6" rims. Check with the&nbsp; manufacturer.&nbsp; As with any rules,
there are exceptions - at least one reader reports that Firestone SZ-50s
will fit the '91s in the 225/55R16 size shown NOT to fit above.&nbsp; Each
tire manufacturer has slightly different exterior dimensions for their
tires of the same basic size and different SHOs have different amounts
of sag in the springs which results in different space tolerances in the
wheel wells.&nbsp; Your best solution is to find a tire place (such as
NTB - National Tire &amp; Battery) that will allow you a "trial period"
with the new tires where you can use them as credit for another set.
<p>Many people wonder about the amount of speedometer error that occurs
when one changes tires from stock size - thanks to Joshua Teixeira for
calculating this table out that shows the differences between some tire
sizes.&nbsp; This is just a generalization for gen 1 car with 15" wheels,
but should give you an idea of what to expect.
<br>&nbsp;
<table cellpadding="3" BORDER >
<tr>
<td valign="center">Width&nbsp;</td>

<td valign="center">Aspect</td>

<td valign="center">Rim</td>

<td valign="center">Tire diameter</td>

<td valign="center">vehicle speed at an indicated 55.0 mph.</td>
</tr>

<tr>
<td valign="center">215</td>

<td valign="center">65</td>

<td valign="center">15</td>

<td valign="center">26.0</td>

<td valign="center">55.0 mph</td>
</tr>

<tr>
<td valign="center">225</td>

<td valign="center">60</td>

<td valign="center">15</td>

<td valign="center">25.6</td>

<td valign="center">54.2 mph</td>
</tr>

<tr>
<td valign="center">225</td>

<td valign="center">50</td>

<td valign="center">15</td>

<td valign="center">23.9</td>

<td valign="center">50.5 mph</td>
</tr>

<tr>
<td valign="center">205</td>

<td valign="center">65</td>

<td valign="center">15</td>

<td valign="center">25.5</td>

<td valign="center">53.9 mph</td>
</tr>

<tr>
<td valign="center">215</td>

<td valign="center">60</td>

<td valign="center">16</td>

<td valign="center">26.2</td>

<td valign="center">55.3 mph</td>
</tr>

<tr>
<td valign="center">225</td>

<td valign="center">55</td>

<td valign="center">16</td>

<td valign="center">25.7</td>

<td valign="center">54.5 mph</td>
</tr>

<tr>
<td valign="center">225</td>

<td valign="center">60</td>

<td valign="center">16</td>

<td valign="center">26.6</td>

<td valign="center">56.3 mph</td>
</tr>

<tr>
<td valign="center">225</td>

<td valign="center">50</td>

<td valign="center">16</td>

<td valign="center">24.9</td>

<td valign="center">52.6 mph</td>
</tr>

<tr>
<td valign="center">215</td>

<td valign="center">50</td>

<td valign="center">16</td>

<td valign="center">24.5</td>

<td valign="center">51.7 mph<IMG SRC="http://service.bfast.com/bfast/serve?bfmid=37919709&siteid=39253888&bfpage=tires" BORDER="0" WIDTH="1" HEIGHT="1" NOSAVE >
</td>
</tr>
</table>

<p>
</b></font><hr>
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