Hi sdchap,
It is not a bonehead question, and as you will see, tire specs are
very complicated and that is why it has taken us so long to research
this for you. We don't know why you have 275/60/16 tires on your car
because all of the tire and car websites that we checked state that
the 2001 Toyota Land Cruiser's original tires were 275/70/16. Briefly
to answer your question, the new tires will be slightly narrower and
sit a little bit lower than both the original and the tires that you
have, but appear to be ok. The tires you are looking at (265/70/16)
are actually closer in size to the original equipment (275/70/16) than
the tires you now have (275/60/16).
Go here:
Tire Size Calculator
Type: 275 - 70 - 16 in the first line (original equipment as baseline)
Type: 265 - 70 - 16 in the second line (tires you are considering)
Type: 275 - 60 - 16 in the third line (tires you have now)
http://www.rx7.org/public/tiresize.shtml
The tires you are considering are only 1.76% smaller than the
originals compared to 6.94% of the tires you now have, so the new
tires should be fine (you might notice a slight difference with the
odometer and speedometer readings, but it should be marginal). SUVs
can handle up to a 15% difference. However, be sure to confirm that
the shape and the bolt pattern of the wheels (rims) will match your
car's!
Following are some websites which will give you more than you ever
wanted to know about tires and wheels but you should look them over
before purchasing the new tires (click on the links for full details).
At the least, you will come up with some good questions to ask the
seller. TireRack is a very large and well respected website and
includes lots of technical articles to read and explore (there's also
a number to call for help, no purchased required).
2001 Toyota Land Cruiser
Original Equipment 275/70-16
"Original Equipment sizes are based on the best information currently
available to us. Variations based on options or changes by the
manufacturer may change the Original Equipment size on your vehicle.
Please verify the size listed matches the tire size listed on your
vehicle (usually found in the door jam or gas cap) or in the Owner's
Manual."
[also see: "tire decision guide" button]
http://www.tirerack.com/tires/SelectTireSize.jsp?autoMake=Toyota&autoModel=Land+Cruiser&autoYear=2001&autoModClar=
2001 Toyota Land Cruiser
P275/70SR16.0 M+S BSW tires All Terrain
http://research.cars.com/go/crp/features.jsp?makeid=47&modelid=428&year=2001&myid=&acode=USB10TOS121A0&defaultSelection=true&crpPage=reviews.jsp&gotopage=features.jsp&aff=national
"If you own an SUV, truck or van - read on. Tire load ratings are
probably the most important specification you consider for a new
tire."
http://www.dualport.com/bustech/load_tires.html
"Shopping for New Wheels?"
"What to consider in choosing a wheel/tire package"
See: What should one consider in upgrading to larger sizes?
Also: FITMENT is the key
"In choosing a wheel/tire package, FITMENT is the key. When done
properly, it is a seamless transition, but done improperly, it can
create a myriad of problems.
The wheel/tire combinations must fit properly within the fenders and
suspension components, with the correct rolling diameter. The wheels
should have the correct BOLT PATTERN, OFFSET (or backspacing), clear
of all aspects of the mounting surface (brake calipers, protrusions,
etc.) suspension components, be HUBCENTRIC (centerbore of the wheel
fitted exact to the hub of the mounting surface) and new lug
nuts/bolts should be provided and used with new wheels. Finally,
after proper fitment, a new wheel alignment is recommended after
installing different sized wheels and tires..."
http://www.ronalusa.com/shopping/
Selecting the Right Tires
What is the right size for my vehicle?
"A tire's first requirement is that it must be able to carry the
weight of your vehicle. No matter how good a tire you select, if its
capabilities are "overworked" just carrying the load, it will have
little reserve capacity to help your vehicle respond to quick
emergency. So when you are in the selection process, make certain that
your new tire's size is designed to carry the weight of your vehicle!
Don't undersize.
The other size consideration is overall tire diameter. Since many of
the functions of today's vehicles are highly computerized, maintaining
accurate speed data going into the computer assures accurate
instructions coming out. And an important part of the speed equation
is your tire's overall tire diameter.
For cars and vans, staying within a 3% diameter change is desirable.
Pick-ups and sport utility vehicles (SUVs) are usually engineered to
handle up to a 15% oversize tire. Most tire dimensions can be
calculated. For more information review the Tire Tech article,
"Calculating Tire Dimensions." While at first a 3% diameter increase
or reduction in tire diameter may sound very limiting, in most cases
it allows approximately a 3/4" diameter change."
http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=31
TireRack - tire tech
Speed Rating, Load Index & Service Descriptions:
http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=35
Aspect Ratio
"Deciphering the writing on the sidewall of a tire does require the
skills of a cryptographer, but it can provide you with useful and
important information. In addition to what follows, you will find a
reference chart explaining the exact meaning of the indications on a
tire sidewall at the bottom of the current page."
http://www.apa.ca/template.asp?DocID=94
Tire Tech/General Info
http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=7
Tire Size Comparison
http://www.miata.net/garage/tirecalc.html
Tire Size Comparison Calculator
http://www.dsm.org/tools/tiresize.htm
Tire and Wheel Upgrade Calculator
http://www.mr2.com/FORMS/tire.html
How's that for making your head spin? In summary, if the rims will
fit, you should be ok but please remember that where the rubber meets
the road is a very important part of your safety and the car's
performance. Any changes from the original equipment should be
investigated thoroughly and put in the context of the conditions of
use. If you have any questions, please post a clarification request
and wait for me to respond before closing/rating my answer.
Thank you,
hummer
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