Chainring replacement
I have a 4.7 Madone with an Ultegra compact setup that is a few years old. When cleaning it up today, I noticed the teeth on the outer ring are fairly jagged with uneven wear. Some are downright pointy. Now I haven't felt much slip or had any gear change issues, but I'd like to prepare for a replacement and have a few questions I'm hoping you can help with.
When do you know it's time?
Should you replace both? I'm in Flat Florida so I don't use the other ring very often.
Should I stick with Shimano or is there better option for someone that does it for exercise and is a big guy?
Is this something I can do myself? It looks like it's attached with 5 Allen bolts. Do you just unbolt, remove, bolt new one on?
Thanks for the help!