I still can't help but think that weight training has helped me at least a bit. If you lift for sheer weight, then you're right your endurance will go down. I know guys that can bench press 280 lbs, but they can't do 180 8 times. I think if you do high reps your muscle endurance will benefit in at least a small way. I can do upwards of 20 repetitions of 325 lbs doing full squats. This has become a lighter weight to me. I just think that it is necessary for me to be stronger because I weigh about 180. At 5-6% body fat, there isn't a lot of room to lose weight. Despite my weight, I have no trouble completing long climbs at a decent speed. I do a 2.5 mile climb at 6-9% gradients along the way, never shift out of the big chainring up front, and never let my cadence drop below 80. I don't think I'd be able to do this if i had never lifted a weight. I would probably only weigh about 145 lbs like I did my freshman year, but who's to know how good of a cyclist I would have been? And who's to know if I would have stayed that small I may have naturally developed bigger. I just think that weight lifting has benefited me. That's all.