My newly-installed 105 external bottom bracket is tight enough that the crank only spins 1.5 turns when I flick the pedals. (With no chain.) I’m wondering if new ones are normally that tight.
I installed a new 105 external bottom bracket on my (CF) Roubaix tonight. I noticed right out of the package that the bearings seemed stiff, taking a slight force to spin them. I was hopeful this might mean they were actually full of grease. The problem came when it was time to insert the drive-side crank’s axle through the bracket. It went in less than an inch and then took some palm pounds to get it in most of the way. And then it just stopped. I actually had to use the wooden handle of a hammer to “pound” it in the rest of the way. All the while I was concerned about the lateral pressure on the bearings – usually not a good thing.
Even when the crank was barely in (before the force) it was not particularly free-spinning. At least it didn’t worsen after the force fit. So now it “spins”, but only makes 1.5 turns when I flick it from the pedal. So, while I doubt I made it worse, I’m wondering if the tightness it exhibits is normal for a new external bottom bracket. I had not had the crank off the previous one until it had 17K miles on it. At that point it spun just fine. I’m just looking for some other experiences on how freely-spinning a new one is supposed to be. And how hard it should be to get the sucker all the way in.