Is this front chainring toast? I dragged my bicycle box on the ground and the chainring rubbed on the cement. I’m planning to ride 600-700km very soon.
by DependentFriend8
Is this front chainring toast? I dragged my bicycle box on the ground and the chainring rubbed on the cement. I’m planning to ride 600-700km very soon.
by DependentFriend8
11 Comments
Edit: Maybe I’m wrong about the wear, looks like there are FSA rings that look like that
It looks like you actually may have pretty seriously ground them down. How far did you drag it!
Old:
That looks pretty worn disregarding dragging it on the ground. If that ride isn’t tomorrow, I’d probably replace chainring, chain and I’d guess cassette. I would especially do this if it’s a remote ride where a broken chain wouldn’t be fun.
To answer your question, it doesn’t look terribly damaged. If it feels rough, you can file down any burrs
As stated, it is worn, not due to that, but looking at the point shape teeth and the amount of space between the teeth.
Those look like a gear should look like. The rest are pointy because they’re super warm. If your front chain ring is this bad and you’ve not serviced it, you’ll want a new chain and cassette as well
Change it..
You’re question has already been answered but a trick for this is to put old magazines or even cardboard under your chain ring in the bike box.
While you are at it, check the chain for stretch. The distance between the centers of the pond should be EXACTLY 1/2”; line up the chain on a bench, measure the distance pin-to-pin on a line of 16 links. Should be EXACTLY 8”. If it’s 8.x”, you have stretched the chain, replace it when you replace/repair the chain ring.
Toasted
Looks like a narrow wide chaining. I’d ride it. It definitely looks worn, bur doesn’t look like an absolute emergency.
That’s a good place to start. Without seeing the rear cluster it’s difficult to determine whether it needs replacement as well. Chainring gets more consistent wear than the rear gears, and in my experience I have done more chainrings than rear clusters.
I agree that sometimes a bike can become a rolling “ money pit”. All depends on how committed you are to continue riding that particular bike. Wishing you the best!
https://alubike.com.mx/products/multiplicacion-fsa-comet-30t-175mm
People say it’s worn but looking at brand new picture it does seem to be normal. Just a weird tooth profile.
If pedaling feels smooth (no “ticking” sensation) and if you can see multiple teeth engaging the chain at the same time (assuming the chain isn’t worn) then it’s most likely OK.
While it probably still is a better idea to replace it, I had the big ring on a Shimano Sora crankset get worn down worse than yours when the airline lost my bike for 3 days. The box was barely holding together when i got my bike, and the extra cardboard i had around the ring was gone. Since my trip was already cut short, I just rode it for a 450km trip, then came home and rode it several thousand more km with no issues. Obviously, it’s a way better idea to replace it, and single ring would be worse than the big ring of a triple ring, but if it’s riding fine now it might not be catastrophic.