ORBO Sum of 50

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Robertk

Robertk

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Joined
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Really looking forward to this build off! The name of my build is 'Sum of 50'. Essentially, I will be using a 1959 Schwinn 24" cantilever frame as the basis. The 'Sum of 50' comes from planning to build this project using a 26" wheel up front and a 24" wheel in the back - 26 + 24 = 50 hence 'Sum of 50'. :wink1:
Using a smaller wheel in the back and a larger one upfront harkens back to the classic dirt bike design. Additionally, Raleigh offered The Edge, Ibis offered the Mountain Trials, and Cannondale offered the SM500 26X24 - all with a smaller wheel in the back designed to increase traction.
Hopefully, I'll be able to use some sort of drum brakes front and back along with multiple speeds.

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So some decisions have been made on parts and overall approach. First up wheels and hubs. Decided on a polished Sun Rhyno Lite wheel set, so a 24" and 26" are on the way. Brakes will be Sturmey Archer X-rd and X-fd. Since I'm going to use a 5-speed cassette and not a single speed free wheel. The rear dropouts will require cold setting. Enter my ultra high tech frame spreader! :21:
 
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Been researching Carlisle knobby tread pattern tires to use.
For continuity, I want them to match each other given the wheels will be 26" and 24". - I like the CST C-693's, but could not find a 24" version, so I decided on a 26/24 Duro knobby set.
 

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