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The Strongest Frame in the Industry - Bayonet
Frame U.S. Patent # 5292043
and P&G Bayonet: Scroll to bottom to see the
A pack can have a great hip
belt and shoulder pads, but without a solid frame, it does not matter. In
a world of internals that are too soft, the 7075-T6 Critical Mass frame and Sarc
Series frames can really handle the load. It is the only frame system, internal
or external that can do all of the following:
its shape through the abuses of backpacking.
on your pack or dropping it are examples of abuse it can sustain.
reshaped to better comply to your anatomy without
losing any of the new shape
in the short or long term. In most cases longer term experience is required to
find the perfect shape. Your 7075-T6 stays are always ready for reshaping!
more real headroom that is also moldable/adjustable.
whatever type of load required up to 120 lb. loads at a high performance level:
The load on a CM frame feels lighter than it really is - same for the lighter
weight Sarc Series where 2 to 4 oz. frame set weights are common - for
loads from 20 to 60 lbs.
and fold out of the way for side trips. The
patented 2-piece, and 4 piece
7075-T6 Bayonet frame is stronger
than single piece frames.
CM frame and Sarc Series frame sets do not impact the
rear of your pelvis.
It actually straddles the sacrum and eliminates much
of the rigid pendulum force vector of many frames that must
be padded by excessively thick lumbar pads.
Criteria for a Pack Frame:
Strength enough to maintain its shape against
the pressure of a heavy load and strength enough to resist collapse
entirely on its own. An extra margin of strength is necessary
to withstand abuse. Setting a pack down hard with a heavy
load should not bend the frame. We achieve all this, without
an increase in weight, by using the remarkable aluminum alloy
7075-T6. CM frame below:
Comparison with Other Frames
A single stay from the SARC frame (7075-T6) system can support
your entire load. Two stays easily control the heaviest
stay pack systems require frame-sheets and/or cross-members
of some type. Twin stays ultimately are more effective. Even
carbon fiber cannot touch the overall toughness of 7075-T6 in
the dimensions we use. 7075-T6 can be reshaped and will
hold its shape through use. Carbon frames cannot be remolded.
offer many different dimensions of 7075-T6 frame stock (from
light-weight to super-heavy duty) to match your backpacking
6061-T6 alloy, used in much of the mass market backpack industry,
does not know when to stop bending. This most commonly
used alloy and dimension is completely unsuitable for large
capacity internal frames where strength and durability are important
and most companies anything nearly this strong. Nevertheless,
it is found in more packs than any other alloy!
- Below: The P&G Bayonet frame extension
system. They add length to the frame and in the process the
shoulder harness converts from our simple guide harness to the
Bypass Harness. The Bayonets can be used to stabilize a bigger
heavier load without adding the Bypass straps as well. These
bayonet stays are just under 12" long x 1/2" x 1/8"
and weigh 2.4 oz / set. They overlap the lower main frame for
half of the length of the bayonets and make adjusting headroom
- Q-Bayonet - At the other
end of the Sarc main stays, the lower ends, are a new swiveling
bayonet that adjust to accomodate different weight loads. When
the bayonet is turned up and the frame is shortened, the pack
bag compresses around it. These have been in production for
almost 4years and give a full range of adjustability for the