Originally Posted by rubiksoval

I definitely wouldn't. If you're planning on riding that much, I'd certainly get the 105. Plus, 10 speed is old. Pit wheels/neutral service will likely be 11. Probably won't come up, but if it does it can be an issue.

105 has 165mm cranks, too.

It's not that it won't hold you back or that it's heavier. It's functionality and durability.