United Trifold

Here is a United Trifold folding bike, which is a weird blend of Dahon and Brompton frame designs. The top half of the bike (seat post, handlepost) is based on Dahon standards, while the bottom half is referenced from Brompton, although not completely.

The main frame folds opposite to Brompton's direction, while the rear triangle has a OLD of 135 mm to fit Shimano internal hubs.

I modified this bike to simplify it, by making it a single speed bike for casual rides. At the same time, the bike weight can be reduced greatly since the internal hub system has been replaced by a simple single speed drivetrain.

Check out the posts below for all the details!














Extra Short Handlepost Modification (Unsuccessful)
(Coming Soon)

Rear Suspension Spring
(Coming Soon)

Folded Size Comparison with 20 Inch Bike
(Coming Soon)

Folded Size Comparison with Brompton
(Coming Soon)

Parking Mode Comparison with Brompton
(Coming Soon)

General Comparison with Brompton
(Coming Soon)

Rear Hanger and Rear Derailleur
(Coming Soon)

Testing with 11 Speed Cassette
(Coming Soon)

Saint Rear Derailleur and 10 Speed Cassette
(Coming Soon)

Chain Tensioner from Bottom Bracket (Unsuccessful)
(Coming Soon)

R7000 Short Cage Rear Derailleur + Extra Chain Tensioner
(Coming Soon)

11 Speed Drivetrain Completed
(Coming Soon)

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