Training & Nutrition - should you work the legs?

I lift weights 1-2 times a week along with my 3-4 days a week riding. I as just wondering if working the legs i.e. squats and the like would result in over training them or is the riding enough to train the legs and just work out the rest of the body.
Please, only serious answers, no bonehead opinions, I can do that myself.

Definitely train your legs. Work the quads and hamstrings, and don't forget that stretching is vital. Work on doing fast reps about 30 times. If you don't start to slow down the last 10 reps because of exhaustion, add more weight.

I do endurance races both biking and running and found that it is a big benefit to train your legs with weights. In the past I have always relied on running and miles on the bike to build strength and this year I changed my planning.

Since May I have been working on strength for my legs coupled with less miles in training and I have never felt stronger then I do now. I climb more efficiently and don’t fatigue as fast. Besides just working your quads and hammys try and work on you core as well. You would be amazed how much energy you can save when you have a strong core. As mentioned work on fast controlled reps (15) and you should be drained when finishing the 15th rep. Work on a different muscle group and return with little rest in between increasing cardiac output at the same time.

Single leg squats, lunges, tuck jumps, dead lifts, and single leg reaches are a good ones to start with. Enjoy the pain and enjoy the increase in power on the bike.

I was part of this group and you can see the resaults in what 4 weeks of training did for us.

http://forums.mtbr.com/showthread.php?t=431372&highlight=Integrate

This one is me:
Pushups: 49 to 55 (+6)
Kettlebell Deadlifts (35LBS): 49 to 56 (+7)
Single Leg Bridges (hamstring issues required this substitute for the SL squats): (R) 44 to 72 (+28), (L) 44 to 69 (+25)
Squat + Cable Row @ 60lbs (same issue required this to sub for the straight leg pull ups): 48 to 58 (+10)


All were timed for 1 min and you can see the increase I gained.

I find it is good for me to work with moderate loads during the cycling season and work with the heavy loads in the off season.