Ben: Not sure that I have ever been to a "Wilderness area" (none in Iowa). If you make the above statement then what about horses and foot traffic causing trail erosion? I have been to Colorado elk hunting and some of the trails caused by people and horses are quite harmful (and these are in a place where NO bike would ever go). Secondly, (and this is serious) they better ban me from the "wilderness areas" because my clothes always have cockleburs or some other plant seed stuck to me. Ever see a horses tail and the junk that they carry?
As far a bikes..... well I'm just "too damn old" to think about riding those things
good luck to all
the dog
It's a valid question. The FS requires weed free hay and most horse people are not going to run horses that have a bunch of weeds in the tail when they get to the trailhead. Picking up burrs, weed seed, etc in the wilderness is different than importing the stuff. Strict fines and loss of use can occur if you disobey the regs for horses.
That's not the case with bikes or for people, but bikes can cover a lot more ground in a shorter time frame than horses or foot traffic. That can spread weeds farther and faster than other methods of travel, and as Rob has pointed out, the erosion issue is much different than with horse or foot traffic. Horse traffic can cause trail issues, but the impacts are far less pronounced than bikers. As another poster pointed out, the number of bikers versus stock users also creates an increased impact.
As for the disabled and wilderness, I'll simply say that 99.9% of people who are disabled are not going to be physically able to get in to these places due to terrain, limitations on their equipment, etc. Plus, we're literally talking about 3% or so of public lands, and a minuscule amount of land open to hunting overall. Do we really need to have motors everywhere? There is a larger societal issue of keeping some of our wildest lands wild. We can keep wilderness wild and let the bicycles and others use the rest.
Lots of options for cyclists to get in on planning and create new designations like the Conservation Management Area along the RMF - which specifically guarantees biking opportunity and room for growth, where appropriate.
As fat man who loves wilderness and doesn't get into it as much as I'd like, I'm ok with keeping things the way they are. Even if it limits my use.