Originally Posted by
Iride01
I didn't read through all the post that got you to this point. But still the questions for me is what's wrong with the current bike if you can get everything working correctly? And what do you expect upgrades to do for you?
I put all new Shimano 105 5800 group on a 30 plus year old bike and while it taught me a lot, it also taught me that when everything works, new stuff doesn't really change how a bike performs from the old stuff.
You won't easily put disc brakes on that bike if it doesn't have the increased rear spacing or mount points for disc brakes.
If the BB shell is BSA threaded, then you can easily change to a Shimano road crankset with a PM. You mention 4iiii, I use them too. I'm assuming you are wanting to buy a crankset from them with the PM already installed, or are you just getting the single sided PM installed by them for the left crank arm?
Thanks for your reply...
I can't put disc... wasn't planning on it, I had mentioned it only as an upgrade on a new bike. To your point, there's really nothing wrong with what I have except for the age of some of the components due to wear n tear. I have 105's except for the crank and front deralier. Just the non-drive arm with the PM on it and I would have to upgrade the BB for it to fit. That only leaves the wheels and tires and I will pretty much have a new bike.