Gym workouts

I head to the gym 3 times a week and now that im fully focused on bike racing. is there any harm in performing the 1.Bicep curl 2. Tricep pull 3.Shoulder press 4.Pec deck for example, or will this have a negative effect on my racing?

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MTB, track sprint, BMX probably not as the additional upper body leverage can at times be helpful. Other than that, then it'll just add more mass to lug up hills and slow you down.
As Alex said, any muscle mass gained will make hills that little bit harder - if you look at the pros, they are usually really skinny in the arm/chest area and I think that's the reason why.
I do those sorts of workouts though because my arms are weak! The extra training helps me when climbing off-the-saddle but I'm sure there's a point which you get to where the extra muscle mass is more of a disadvantage than an advantage. So knowing when to stop is something i'm constantly reviewing...
@gietvangent
But I just used the weights like a "top-up" because I was eager to stop the wobbling about as soon as possible!
@gietvangent