WHAT IS IT? Thor makes four different models of roost
deflectors: the $99.95 Sentinel XP, $79.95 Sentinel, $69.95
Quadrant and the $44.95 Comp Flex under-protector. For
racers looking for a plastic chest and back protector that
can be worn over or under a jersey, the Sentinel is
Thor’s go-to guard.
WHAT’S IT COST? $79.95.
www.thormx.com or your local dealer.
WHAT STANDS OUT? Here’s a list of things that
stand out with the Thor Racing Sentinel roost deflector.
(1) Mission. The Sentinel isn’t a full-coverage chest
protector. It is more of the motocross version of a
bulletproof vest (albeit in plastic instead of Kevlar).
Riders have started leaning towards less overall protection in favor of protecting the parts of the body most
likely to take abuse from roost, rocks or footpegs.
( 2) Straps. The Sentinel has one wrap-around strap
that clips into ratcheting closures on the front of the
chest piece. The combination of stretch in the elastic
strap and 3 inches of ratcheting adjustment give the
Sentinel the versatility to fit a wide range of body types.
There is one caveat, though; it is possible for a rock to
hit a ratchet button and unhook the strap. We know
this from experience. The back panel is removable,
and with a back strap kit it can be turned into a
front-only roost deflector.
( 3) Minimalization. The Sentinel is not a full-cov-
erage chest protector. It lacks the plastic shoulder cups
and upper arm guards that differentiate a chest protector
from a roost deflector. It does have durable boxed-ribbed
plastic panels, front and rear, to protect against flying
roost and hard impacts with blunt objects. There aren’t
a plethora of ventilation ports, so the Sentinel can get
warm in the summer months. But, since you wear a roost
deflector for its coverage, spacious vents are not high on
the list of priorities. As far as plastic protection goes, the
Thor Sentinel is as minimalistic as a plastic guard can
get—only Biofoam under-protectors are lighter.
( 4) Neck-brace compliant. While the more
expensive Sentinel XP has removable plates to accept
neck braces, the Sentinel does not.
( 5) Performance. Unlike old-school chest protectors,
modern roost deflectors, like the Thor Sentinel, Leatt 4. 5,
Fox Proframe LC, O’Neal Holeshot and Fly 4. 5 Pro, are
designed to allow natural movement of the body. The
Sentinel is small by old-school standards, but it covers
everything that the full-size chest protectors do, except
for the shoulders and upper arms.
( 6) Option. It is available in white or black.
WHAT’S THE SQUAWK? Two salient points: (1) If
you weigh over 190 pounds, the Sentinel has the sausage
effect. ( 2) This is not a full-protection chest protector.
Instead, it is a 1970s Torsten Hallman GP roost guard
made out of plastic.
Thor’s Sentinel roost guard is as
minimalistic as possible. It can be worn under
or over your jersey. We were pleased with the
fit and finish of the Sentinel, but it does not
have shoulder or arm guards.
THOR SENTINEL ROOST DEFLECTOR
MXA TEAM TESTED