I'd just like to comment that before you go to the printer with any materials you put together, that you have it checked for grammar/spelling by two or three native Spanish speakers. Even as a non-native Spanish speaker, I always see monster errors in grammar and spelling that affects (I think) the credibility of the material.
I think one culturally-specific point I might suggest is an emphasis on bike safety. I just seems from being around my Latino friends and co-workers, ideas about physical safety and accident avoidance aren't in the mental landscape as much. A specific example we have here in Chicago is that between 11:00 pm and 1:00 am we have all the Latinos riding home in the dark on bikes from their restaurant jobs, dressed in dark jeans and black jackets and no lights or reflectors, and they just get mowed down by late-night drivers coming home from bars. So incubating the safety perspective would be a strong positive.
One point I see in the black community I work in is that groups who are interested in promoting biking in their church groups or youth groups are promoting biking as part of a general fitness/wellness push in their groups, as a counterpoint to diabetes, obesity and high blood pressure. I think the wellness component of biking is a useful emphasis in the Latino community, which is suffering from the same stress factors.