The fixed wheel is really is part of the challenge as 50 miles a day is very doable, also would bring more attention to getting people to donate for the charity, *obviously I somewhat doubt it would be as enjoyable as a light geared bicycle, but alas.
Suppose it also cuts down on weight carried for any spares and such and is one less possible part to brake.
Suppose it also cuts down on weight carried for any spares and such and is one less possible part to brake.