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Santa Cruz Bicycles
Bronson Mountain Bike Frame - 2015

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Not-so-heavy metal.

On paper, 27.5-inch wheels make lots of sense, but it took a few seasons for them to find their place in the mountain biking landscape. We’ve mused plenty on their ideal blend of characteristics, relative to their 26” and 29” siblings, but here, in the Santa Cruz Bicycles Bronson Mountain Bike Frame, is arguably where this balance finds its finest manifestation, evidenced by the repeated success of the Bronson under the Santa Cruz Syndicate race team and countless other racers topping podiums in multiple disciplines. Now, for 2015, the Bronson gets some new colors, but it's otherwise an identical machine to the 2014 version.


At the heart of the Bronson is a highly refined VPP suspension platform that's been optimized for mid-sized wheels. It's a suspension platform that's widely beloved among riders in-the-know for its blend of pedaling efficiency and trail-erasing smoothness. VPP employs two aluminum counter-rotating links to achieve this balance. But, you may be wondering how it works? Well, the upper-link provides most of the rotation as the bike compresses into the sag point. This yields a vertical wheel path, which you'll notice in the form of a firm feel during acceleration. As the bike compresses deeper into the suspension, the lower-link activates, moving the axle path rearward. The rearward axle path enables the rear wheel to travel out of the way of impacts. So, the ride remains smooth, not jarring. You'll also find the same collet-style pivot hardware that's become standard for Santa Cruz's suspension bikes. This means that your pivots stay tight and are easily serviceable at home if ever necessary.


Certainly, the carbon fiber version of the Bronson delivers the model's purest performance, but the alloy version here showcases the latest and greatest of Santa Cruz's expertise in the manipulation of aluminum, delivering a frame that's only slightly heavier than its fibrous friend. Butted and hydroformed tubes take optimized shapes that came to be as the result of countless test-riding hours and computer model simulation, resulting in, among other things, excellent standover height and a tapered head tube for steering precision. On the whole, handling and lateral stiffness are superb. Were it not for the scales or the ring from the flick of your fingernail, you'd likely never notice that this here Bronson is born from metal.


The Bronson utilizes a 44/56mm headset for compatibility with tapered forks. The rear dropouts accept a 142x12mm thru-axle rear hub, which keeps the frame stiff under power. The 73mm English threaded bottom bracket shell ensures a creak-free crankset and easy service. The frame requires a 30.9mm seatpost and a 34.9 front derailleur, and it's only compatible with 27.5-inch (650b) wheels.


The 2015 Santa Cruz Bronson Mountain Bike Frame is available in four sizes from Small to X-Large and in the colors Dark Green/lime green and Satin Black/magenta.


Frame Material
aluminum
Suspension
full suspension
Rear Shock
RockShox Monarch RT
Rear Travel
150 mm
Head Tube Diameter
ZS44/EC49 mixed tapered
Headset Included
no
Bottom Bracket Type
73 mm English
ISCG Tabs
yes, ISCG 05
Cable Routing
external
Front Derailleur Mount
34.9mm clamp-on
Seatpost Diameter
30.9 mm
Seat Collar
34.9 mm
Rear Axle
142 mm thru-axle
Recommended Use
all mountain, enduro
Manufacturer Warranty
5 years

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