Due the poor performances of C5's front brake, one of the first idea i had was fitting a new disk brake.
I seen other guys on the forum who have made very good solution and inspired me.
Today is possible find clamps and rotors for bicycle application, appropriate for C5 at very cheap price, so i bought on Ebay a Promax mechanical clamp and a 140mm rotor (the smallest available) all for 35 Euro of total cost, and both can be installed with no radical mods.
To install the rotor on the wheel, i decided to machine two aluminium circular pieces: an external flange to bolt on the rotor, and a small internal ring to put inside the wheel's hub; these elements will be bolted together using three screws, in a sandwitch configuration with the hub's wall inside.
First of all, i machined the side of the wheel for depth of 15mm, to create the room to place the external flange
then I turned twho pieces from an aluminium bar, to realize the flange and the internal ring
... two pieces are these quota:
rotor flange:
- external diameter: 55mm
- internal diameter: 33mm
- width: 7.5mm
- #3 holes @120° diam. 4.5mm + 7mm bolt's head housing
- #6 holes for standard ISO six bolts pattern (5x0.8M)
internal flange:
- external diameter: 27mm
- internal diameter: 13mm
- width: 7mm
- #3 threaded holes @120° - 4x0.7M
Below the pieces finished:
... then the internal ring has been cut, to permit to better accommodate in the wheel's hub when screws will be tighten ...
The ball bearing cup has been filed of 1mm, to permit to reinsert it correctly in to the hub:
... and here the complete kit:
The hub has been holed (#3 at 120°) to permit to get through three screws:
Finally was placed the internal ring (using a large bolt to insert it in the wheel), and screwed with the rotors' flange ...
... then the disk has placed and bolted to the hub.
The group is firmly blocked to the wheel, that is clamped between two aluminum rings.
Next step was to build the clamp's support to the fork I shaped using a piece of 2.5 mm thickness aluminium sheet ...
The support was screwed to the fork using a couple of allen screws; i used a pair os special threaded rivets placed using a tool that firmly shots it in the prepared holes:
... and this is the completed assembly.
Alex Bromo