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Civia Bryant Dropout Part 2

Monday, August 2, 2010 | 2 Comments Written by: Burton Avery

The Civia Bryant is a unique transportation bike, with an attention to detail that you don’t find even on some bikes by custom builders.   As the industrial designer at Civia, I can say with authority that we designed the Bryant from the ground up for a refined transportation experience.  Does that mean Bryant is only for transportation?  Not even close.   The Bryant is an all-arounder, fun to ride in many different ways.   Last summer I set up the Rival spec'd Byant with some Challenge Grifo CX tires and rode miles of single track and gravel roads to work. That was a blast. Transportation can be defined broadly!

My last post was about the form development of the Bryant dropout.  In today’s post I’ll be going into more detail on the functionality of the Bryant dropout.

The Bryant uses replaceable CNC alloy dropout plates for drivetrain modularity.  The dropout plates are fastened to the frame by common chainring bolts for strength and longevity. Here are tooling samples of the Bryant dropout derailleur version, note the derailer tab on the diver side and the vertical dropout on the non-drive.

 

 Next is the internally geared hub and single speed version to give you a range of chain / belt tension adjustability.

 

 

For clarity, here is the dropout without the dropout plates.

 

 

Then last is how the frame splits for belt drive compatibility.  The split in the frame is at an angle so the frame only needs to move a couple millimeters to get the belt through. Again this is a first generation prototype so the dropout is not completely finished.

 

 

So there you have it; the Bryant’s modularity offers three clean drivetrain solutions ranging from traditional derailer to cutting edge belt drive.  While you might not switch drivetrains every season, the Bryant’s functionality makes it a bike for the long haul and perfectly suited for transportation.

Thanks for reading.

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This post filed under topics: Bryant

Comments

Brandon Swanson | December 4th, 2010

Hi i am a custom frame builder and i really like your split frame dropouts. I was wondering would you be able to sell me just the dropouts?

Daniel Peters | December 27th, 2010

I would like to install a Rohloff rear hub in place of the Shimano Alfine hub for greater gear range, but keep the Gates carbon belt.  Do you foresee any problems making this switch?  Thanks.

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