Extremely light & stiff muni frame for 387 mm and 406 mm ETRTO-size, 19" - perfect for Urban unicycling, Flat, Street, Trial
All #rgb-frames have one thing in common: They now have a Unicrown-frame and not a square-crown anymore. This keeps damage from your shins when touching the frame in rough terrain or during tricks for example. They are being made of 6061 T6 aircraft grade aluminum alloy.
To achieve a low weight at the same time, we made the seat-tube a lot larger. Sounds weird to reduce weight? Well, this allows to reduce the wall-thickness quite a lot! The tube is 38 mm wide at the low end - and 34,9 mm at the seatclamp-shell. This results in incredibly low weights.
The 19" frame weighs only 422 g excl. bearing-sheels (78g) and screws (22g). We shed weight at that end, too - by putting the thread into the frame-bearing-shell. This is easier in handling - and saves the weight of those four nuts and washers.
The #rgb-bearing shells are, as already appeared on the latest QX [debut] series frames more more filigran and slim. leaving more space towards the wheel and with a guide for the bearing within the shell.
The 19" frame is made for tires up to a width of 2,6". The shaft length (top edge crown > top edge seat tube) is 155 mm.
This fork is suitable for 42 mm bearing diameter (Q-Axle, ISIS), not for square bearings (40 mm).
Find free 3D-printer-files here for washers making it perfectly easy to clamp the bearing-shells in a way that they are perfectly adjusted.
