Ergon BX2 Review

Hydration Pro Reviews

BX2 Features
The BX2 pack is a multi piece unit, consisting of the main section, and then a secondary shoulder unit. The main uses a thin flexible plastic sheet for its frame body, with padded mesh back and hip covers, waist strap, and an attached nylon storage bag with two compartments. The secondary unit also uses the same thin plastic flex frame material, and attaches to the main pack with multiple large Velcro straps. It has padded shoulder straps, which attach to its upper frame with a free-floating system, allowing the straps to adjust, angulate and undulate as required. The lower strap connects to the main section’s trapeze, which extends around the bottom of the pack, helping to compress and pull up the load for better weight distribution and tighter center of gravity.

The pack comes in two sizes, regular (heights 155 – 175cm/5’1 – 5′ 9 ) and large (170 – 195cm/5’7 – 6’5), and each of those has an additional adjustment for four torso lengths, small, medium, large and x-large. The torso alteration is accomplished by detaching and reattaching the three Velcro points, which consist of the two back pads and the main center size adjuster. To change the length, you open the back mesh pads, and loosen the shoulder flex frame, and then back out the center strap. Choose the proper sizing for your torso using the pack’s instruction manual, although it will sometimes require some trial and error to get things worked out optimally. Starting from the back of the shoulder system frame, insert the center Velcro webbing up through a slot that is above the chosen lettered size (S, M, L, XL), and then insert the strap down into the next lower slot, covering over your size. Snug the center strap tightly, and push the Velcro down, and then roll the back pads over and push and snap them in place. The sternum strap is length and height adjustable so you can position as desired. Ergon refers to this entire system as the ‘Perfect Fit Backpack’.

The shoulder frame pokes out with A shaped ending in which the shoulder straps fit, and the straps are then attached through their webbing onto a set of D-rings, so the entire system is free floating, allowing for varying shoulder widths and sizes, and pack and body movement. The included rain cover upper straps get attached by sneaking them under the frame sheet and shoulder strap, and the bottom portion wraps underneath the pack with elastic edging.

The back and hip padding is quite soft and thick, and the mesh uses a nice open weave for maximum comfort, ventilation and wickability. The padding is rather tall (3/8-1/2 inch), and due to its separation, it creates a large and wide air channel, so the back and waist have great ventilation, keeping thing’s more comfortable and drier (no wet spots).

Next -> Features Cont. & Impressions

About the author: Brian Mullin

Brian has been part of the Mtbr team since 2007, where he has become an integral member of the review and test staff, specializing in technical articles. He likes to push the limits in all the sports he obsesses in, whether it's mountain biking, whitewater kayaking, extreme skiing, or sport climbing. He takes those same strengths and a good dose of insanity to his reviewing and writing on mountain biking products, creating technical, in-depth and hyperbolic articles. Whenever he's not on the bike, he might be found watching MotoGP racing, otherwise look for him out on extremely technical singletrack.


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  • Carl H. says:

    I’m 5’8 and got the regular BX2. Having a long torso, I adjusted it to the XL position. In that setting my Camelbak reservoir hose turned out being too short for the pack. So buyer beware.
    The most annoying feature of the pack is the reservoir hose obstructing the main compartment pocket. I can’t the believe the guys that designed the pack did not think about that detail.
    Other than that, it is a well designed pack, but sure is overpriced considering it does not come with the hydration bladder.

  • Mtn Goat Man says:

    Will a 3 liter reservoir fit in this pack?

  • Brian Mullin says:

    Yes, a 3 liter/100 oz will work, although you can’t hang it for the internal hook.

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