hey guys fuller again with custom
offsets custom offsets TV back at it
with another video we're gonna be
answering your questions from our inbox
which is why I have this piece of paper
printed off with some of the questions
you guys have been asking and today
we're gonna get technical on tires so
the first question that I pull out of
the inbox was you guys explain why it's
a bad idea to run a wide tire on a
skinny wheel and that's actually not
true it's perfectly fine to run a wide
tire on the skinny wheel unless you're
going super extreme but I don't think
that's what you meant so it's actually
really common in the off-road world to
have a lot of tire and a little bit of
wheel because you don't want to be
damaging your wheels and you need that
nice big sidewall for getting through
the mud or crawling over rocks or
whatever you're doing with your truck
offroad so you can easily run like a
twelve and a half inch wide tire on a 9
or an 8 inch wide wheel that's perfectly
fine to do
I owned a beater ranger way back when
that had I think 15 by eights on it and
I ran a ten and a half inch wide tire so
there was plenty of sidewall sticking
out and had a big bulge on the side and
that's fine to do it mounts up fine you
don't run into any issues with mounting
balancing you don't tend to have
problems with that's all fine and dandy
now on a lot of the newer trucks like
the new Silverados and the new Fords you
can't run a really tiny wheel as in
diameter so like trying to fit a 15 on
there won't work simply because it
doesn't fit over the breaks but if you
did go down to like a 17 by 8 you can
still run that 12 and a half inch wide
tire if you're looking for that big
balloony sidewall you're looking for an
aggressive off-road setup there's
absolutely nothing wrong with doing that
it's perfectly safe and you didn't run
it like that with no problems so then on
the opposite spectrum of that the more
common question we get asked is is it
safe to run a stretch tire meaning a
tire that is skinnier than what the
wheel is so for this example here we
have a 14 inch wide wheel this is 20 by
14
and the tire is a 325 50 so if you don't
know what that means it's not really a
big deal because we actually have a
calculator on our website if you scroll
to the bottom you see a button that says
calculators click on that you can enter
in this metric size it'll convert it
over to a standard size which is easier
for most people to measure and you can
you know kind of do fitment in your head
without having to do crazy math and
whatever a cross section with is in the
ratio of the difference depending on
what size the wheel is bla bla bla bla
bla metric tires are hard to understand
standard tires are easy so 325 50
equates to twelve point eight inches
wide so this amp tire is 12 foot 8
inches wide this wheel is 14 inches wide
so you'll see on the sidewall it's not
as drastic but you can see that the
there's not a bulge it's not sticking
out past where the wheel is it's
basically flush and then it dips into
where the tread is the tread is
definitely narrower than where the wheel
is so can you mount it yes absolutely as
you can see this is mounted on here just
fine this wheel and tire setup has like
25,000 miles on it have not run into any
issues there's no D beading problems
there's no balancing problems no
vibration issues if you can mount the
tire under the wheel it's fine
the only time you run into like crazy
problems is if you have very severe
stretch and in the truck world we don't
see that it's gonna be often seen in the
car market where people are stretching
like a 195 on to like a nine and a half
inch wide wheel or something like that
we've got a couple examples we can show
you from some of the guys that run cars
here now again is it bad to do that
mm-hmm we can't recommend it for safety
reasons but there's plenty of people out
there that are running tires that are
narrower than the wheels is there any
advantage to doing that no there's not
it's simply a looks thing you don't
really gain anything by having a
narrower tire other than you might save
a couple dollars off the initial
purchase because since the tires are
smaller there's less rubber or less mint
means less cost so that's about the only
thing that you get out of having stretch
tires that's a benefit I can't think of
any reason why you would want them other
than because you like the way it looks
or that they don't make a wide enough
tire in whatever application you're
using if you have something crazy like a
24 by 16 and you're trying to run a tire
that doesn't have a ton of sidewall
because maybe you don't have a truck
that's got you know 10 or 12 inches of
lift you've just got like a seven and a
half inch lift kit so you can't go with
a big tall tire and you're trying to
stay as small decidable as possible a
lot of times that's where you're gonna
run into stretching because they simply
don't make a tire that that is that wide
for that tall of the tire so like you
can't get a 33 by 15 they don't nobody
makes a tire that's only 33 inches tall
but 15 inches wide so if you're running
like a 22 by 16 you're gonna have to
really stretch tires to fit that 16 inch
wide wheel when you're in the 12 wide or
10 wide or 14 wide setup you don't
really run into any problems there
because there's usually a tire that you
can at least get it straight up and down
side well if not even have a little more
protection so I'll jump into a thirteen
and a half wide tire to show you what
that looks like so then this example is
a thirteen and a half inch wide tire on
a 12 inch wide wheel so if you look at
the sidewall you'll see that the exciter
wall extends over the wheel just by a
little bit like I said this is a 12 inch
wide wheel with a thirteen and a half
inch wide tire so it equates out to
three quarters of an inch on both sides
so it just barely sticks out past that
wheel this would probably be what I
would call the optimal tire size for a
12-inch wide wheel so this is a
thirty-five thirteen and a half on a
twenty by twelve now there's plenty
people out there that are going to run a
twelve and a half
and that works just fine too but if you
really want you know no stretch at all
straight up and down sidewall still a
little bit of protection because this
sidewall sticks out further than the
wheel so you're not gonna run into curbs
or if you're taking it offroad you're
not gonna hit rocks and be damaging your
wheel or anything like that you still do
have some sidewall protection this also
is gonna allow you to use the full load
capacity of the tire because you're not
putting any extra stress on that side
wall now if you're running a stretch
tire where the tire is narrower than the
wheel is you're gonna start to decrease
the load capacity and the load rating of
that tire because you're putting extra
stress on the sidewall that wasn't
intended to be there so like I said this
is basically the optimal size thirty
five thirty and a half on a twenty by
twelve you can also go down to a 33 but
there's not companies out there that are
making a 33 by thirteen and a half right
now but if they're listening they
probably will start making those you can
always use metric two again that's
something that on our website if you are
shopping for wheels and tires you find
the wheels you want you click on add
tires it'll show you metric options that
also fit and then in parentheses you'll
see what the conversion is so a lot of
times it'll be like a thirty three point
eight by like twelve point nine or
something like that so you can just see
what fits without having to know like I
said before where the cross section
width is and the ratio depending on what
wheel size it is you just use the
calculators built into the website to
figure all that out so we have one more
tire to look at as an example this is
the gladiator X comp 35 by twelve and a
half on a 12 inch wide wheel so there
was a comment on YouTube that basically
said we're morons and we don't know what
we're doing because we keep putting 12
and a half inch wide tires on 12 inch
wide wheels and that is wrong you
shouldn't do that I can tell you that
this is probably the most common setup
that I see the reason why is because the
twelve and a half inch wide tire is the
most popular size tire in
35 a 33 even up in like the 37 you can
get to 37 by at 12 and a half as you go
up in size to 37 38 and 40 then that's
where it's more common that you're gonna
see a 13 and a half or 15 and a half
wide and then you don't run into any
stretching issues but it is not unsafe
to put a 12 and a half inch wide tire on
a 12 inch wide wheel it actually fits
just about perfect at the straight
up-and-down sidewall because it's a
quarter-inch extra on each side and I'll
explain something else to you that's
gonna blow your mind when I show you how
to measure wheels and why this
twelve-and-a-half fits on here just fine
oh no so this is a 12 wide wheel now
when most of you go to measure this
you're gonna grab your handy dandy tape
measure and you're gonna go from the
face of the wheel all the way to the
back and you're gonna go pull the crap
that's 13 inches that is why at 12 and
1/2 doesn't fit on here that's not how
you measure wheels so it's actually
measured from inside the bead where the
wheel is going to sit and that's where
the wheel is actually mounted this is
just the outer barrel or the rim of the
wheel
what up Nick so now that's out of the
way like I said the correct way to
measure is inside so if you measure
inside the wheel you'll see that it
comes out to exactly 12 inches and that
is why it is perfectly fine to mount a
12 and a half inch tire on a 12 wide
wheel because you're not stretching it
and that is fine that is a proper sight
now if you call up
Bob's tire store and they're trying to
put tires on your truck there's probably
gonna be Bob he's about 65 he's ready to
retire he's kind of grumpy but he's been
an entire business a long time and he's
gonna tell you
oh you can't put those on there that's
not gonna fit sorry about I didn't mean
to personally attack you but if it we do
it all the time check out our gallery
it's got 40,000 vehicles in it all the
detailed fitment specs so you can see
exactly what sizes of wheels tires
suspension that everybody's running you
can see if they've done any trimming to
make this stuff fit and
yeah that's the best way to find out
what setup you can run on your truck I
hope you guys learn something about
tires if you have any other questions
about tires feel free to drop them in
the comments below or try to do more of
these videos where we answer your
questions directly if you have more
questions about stretching tires in
general in the truck community most
people frown upon it but if you want to
run 305 50 nit O's on your 14 inch wide
wheels go for it people do it but you
didn't hear it from me because we can't
recommend that because that's a safety
concern and I didn't tell you to do that
piece I'm up hmm so no that's out of the
way