❏ In our July issue we brought you
a huge 4x4 shootout. Each machine
was equipped with different brands
and styles of tires and wheels. The test
was to help show you how different
tread pattens and wheel offsets affect
the handling of certain machines.
One tire that was not included was
the AMS Radial Pro. This tire is very
similar in construction and style as
the directional tires featured in the
The AMS Radial Pro has stepped,
solid, V-shaped lugs that are staggered in the center and wrap around
slightly to the sidewall. There’s
not a ton of side bite, but there’s
a good amount of traction for riding in deep-rutted trails. What you
do get with this tread pattern is a
smooth-rolling surface that has no
vibration and very straight-line manners. The carcass is a DOT-approved
eight-ply, and sizes range from
25x8-12 up to 26x11-14. Prices start
We mounted a set of the Radial
Pros on an AMS cast-aluminum
wheel. We went with 1 inch taller than stock at 26. During our 4x4
test, we found out that none of the
machines rubbed or had ill handling
using this size tire. The extra inch is
good for bump absorption and helps
with ground clearance. Since this is
a thick eight-ply tire, we could get
away with only running 5 psi in each
of the four tires.
Again, the tires rolled very smooth
on hardpacked and loose dirt. They
did great on slick, hard, rocky surfaces too. We never felt like the tires
were going to lose traction or break
free when we were rock crawling.
Traction was near perfect, both in
a straight line and under braking.
The stepped design works similar to
PRODUCT EVALUATION UATION
The AMS Radial Pro
has DOT approval, an
eight-ply carcass and
solid lugs that wrap on
the side for very predictable handling. They
come in sizes for every
4x4 utility ATV and
some smaller UTVs.
Prices start at $118.
We tested the Radial
Pro in mostly dry conditions. Almost any tire
works great if the dirt
is moist and traction is
good. The AMS Radial
Pro worked well in
loose or hardpack or
when rock crawling.
After 75 miles, wear
was hardly noticeable,
and we have yet to suffer any flats.
a dimpled knobby but doesn’t allow
the knobby to flex, so traction is a
lot more consistent. Usually, wear is
better as well. We put over 75 miles
on these tires during two test rides,
and they are holding up very well.
The steps still have sharp edges, and
we have not suffered any flats and do
not expect to. An eight-ply tire is virtually indestructible on a 600-pound
quad and is as thick as you need.
Furthermore this tire has a decent rim
guard that keeps rocks from getting in
between the bead of the tire and the
wheel. It also protects the wheel from
some deep scratches.
The offset of the rear wheel the tires
were mounted on was a bit wider than
we liked. For most 4x4s, we like to stay
as close to the stock offset as possible.
This way the quad steers at its best
and handles the way the developers
intended. The only real problem we
had with the wider wheels was the
quad wouldn’t fit through a narrow
doorway of a barn where we store
The AMS Radial Pro is a smooth-rolling, strong tire that gave predictable
handling in all conditions. It could
actually be used on the street with its
DOT (Department of Transportation)
approval, and the solid lugs wear
slowly. AMS also has a Street Fox
tire that we plan on testing on the
tarmac soon, so stay tuned for that.
AMS is the in-house brand for Parts
Unlimited, and nearly every accessory shop in the country carries their
products. If yours doesn’t, you can log
on to www.amstires.com and locate a
dealer close to you. ❏
By the staff of Dirt Wheels