Flevo-racer with chain box: design box part 1
The design in parts
	Overview of the design (start page)
	Redesigned frame
	Adjustable seat
	Chain box design part 2
	Chain box design part 3

Chain box
The chainbox must
- protect the chain against dirt; so enclose the chain comletely (100%);
- keep the transmission well oiled and smooth running for optimal efficiency;
- be easy to disassemble;
The chain box material is stainless steel, 1 mm thick. The interior part is "look-through" so that side winds have less effect on the steering. The box is mounted to a metal strip just under the bottom bracket. And close to the centre line it is fixed by two clamps.
The total weight of the chain box is estimated 1500 gramms.

The chain box is made of several parts.
There is a top and bottom part which are placed over the chain; these two parts are bolted together with two M5 bolts. To have the box sealed, an O-ring is used at the bottom-bracket.
An oil-seal-ring is used at he Rohloff hub. Both sealing rings are placed in specially constructed holders, and must be placed into position before assemblying the bracket and the hub.

Next page -> chain box part 2