So using that logic (which seems entirely sensible to me) we should also include clothes worn, that might push the boundaries up by 5lbs, cycling shoes are usually pretty heavy. I don't have any experience with 29ers so I'll take the 5lb greater weight suggested above.
So now we have the following categories
[table="width: 500, class: grid"]
[tr]
[td][/td]
[td]Bikepacking[/td]
[td]Road Touring[/td]
[/tr]
[tr]
[td]Lightweight[/td]
[td]60 lbs[/td]
[td]55 lbs[/td]
[/tr]
[tr]
[td]UL[/td]
[td]50 lbs[/td]
[td]45 lbs[/td]
[/tr]
[tr]
[td]SUL[/td]
[td]40 lbs[/td]
[td]35 lbs[/td]
[/tr]
[/table]
These might seem a little high, but I think they give some room for various bike/gear/context trade offs
I think those are at least a bit high. I added in the stuff I didn't count because I wear it back in and I came up with 31 pounds 4 ounces for my latest list for my mountain bike including the bike and everything on it. That is with just about all the fat trimmed, but no crazy light stuff like cuben fiber stuff. The bike has a light-ish frame, but has only moderately light components. It has 36 spoke wheels and older XT components. Everything is fairly durable stuff. I don't think it is in the SUL range, the lower end of the UL range yes.