Road Bike, Cycling Forums banner
1 - 20 of 47 Posts

·
Registered
Joined
·
15 Posts
Discussion Starter · #1 ·
Hello,

I just recently purchased a Specialized Diverge DSW and within a week, one of the chain ring teeth bent 90 degrees towards the small ring. I took the bike back to my LBS and they said it would not be covered by warranty and shaved the tooth down.

I only ride on a bike path and have no idea how this would have happened. Pretty disappointing that this would happen so quickly after purchasing the bike.

2 questions:


  1. Should I contact Specialized directly and see if they will help me out?
  2. Will this affect my bike in any negative way?

Thanks for your input.


Bicycle part Yellow Bicycle drivetrain part Bicycle Crankset Bicycle drivetrain part Bicycle part Crankset Machine Bicycle chain
 

·
Registered
Joined
·
5,372 Posts
Was it bent when you purchased it?
If not, why would the LBS or Spec be responsible?

It would probably effect the shifting, if it occured at that position on the cranking cycle. But since your just on the bike path and not trying to win a field sprint with Cav&Crash, it will probably be ok.
 

·
Registered
Joined
·
15 Posts
Discussion Starter · #3 ·
Could it have been slightly bent when I purchased it? Maybe, but it was only on my last ride that I noticed the noise the chain was making when it would catch on the bent tooth. Seems like it would be pretty difficult for this happen on a bike path--if I had been off road or on gravel I could understand...
 

·
Registered
Joined
·
5,372 Posts
Obviously something happened to it. I would look for other locations for the problem, not on the bike path.
 

·
a real member's member
Joined
·
3,880 Posts
that chainring does not look only a week old.

Will this affect my bike in any negative way?
ride it and find out?

if the chain is skipping, simply buy a new or used chainring. all the info needed to purchase one is the bcd and tooth count.
 

·
Registered
Joined
·
7,492 Posts
Praxis crankset is standard? Bike was sold as new?
 

·
Registered
Joined
·
7,147 Posts
If you bought that new recently, (a) you need someone to show you how to shift and ride (b) see (a). How come the derailleur is so scuffed up? It looks like something has hit the outside of the derailleur.
What details have you left out?
 

Attachments

·
Registered
Joined
·
15 Posts
Discussion Starter · #9 ·
If you bought that new recently, (a) you need someone to show you how to shift and ride (b) see (a). How come the derailleur is so scuffed up? It looks like something has hit the outside of the derailleur.
What details have you left out?
Yes--next Wednesday will be 2 weeks. This is my first road bike, so yes my shifting and riding is not great; however, I can't recall anything hitting the derailleur. I actually believe what you are pointing out is some grease that rubbed off and not scuffs, but I will double check when I ride a little later today.

Again, I don't believe I ran over or hit anything, and as crazy as it may sound, the sound of the chain hitting the bent tooth seemed to just come out of nowhere.

Should I be worried about the one tooth or is it imperative to purchase and install a new ring?

Thanks again for any and all input.
 

·
Registered
Joined
·
7,147 Posts
Great if it is grease, I hope so, In that case I would be thinking that while the chain was on the smaller chainring you or some one has inadvertently bumped the larger chainring into something hard like a concrete curb. No, the one tooth is probably not that critical (but you need to check that all your teeth are straight). Looking at the amount of wear on the outer chainring I think you need to look at this. https://youtu.be/C9ZA-4gYpMQ?t=1m2s

If you get a chance, go on a group ride and tell them you are new and are looking to learn, most cyclists will be happy to help.If you can't do this at least ask the shop if they can help you shift better. This isn't a warranty issue but it is a good teachable moment. Keep asking any other questions you may have. Good luck.
 

·
Registered
Joined
·
15 Posts
Discussion Starter · #13 ·
Great if it is grease, I hope so, In that case I would be thinking that while the chain was on the smaller chainring you or some one has inadvertently bumped the larger chainring into something hard like a concrete curb. No, the one tooth is probably not that critical (but you need to check that all your teeth are straight). Looking at the amount of wear on the outer chainring I think you need to look at this. https://youtu.be/C9ZA-4gYpMQ?t=1m2s

If you get a chance, go on a group ride and tell them you are new and are looking to learn, most cyclists will be happy to help.If you can't do this at least ask the shop if they can help you shift better. This isn't a warranty issue but it is a good teachable moment. Keep asking any other questions you may have. Good luck.
Thanks-- I do try my best to avoid cross-chaining, although as I am new to this, I have accidentally shifted into a cross chain position sometimes (I shift out ASAP).

I guess the other question is that if I have to pay to replace it myself, is it worth it at this point or should I wait? If replacing it is the best bet, then is it possible to just purchase the big ring (I can't seem to find just the big online)?
 

·
'brifter' is f'ing stupid
Joined
·
15,563 Posts
Thanks-- I do try my best to avoid cross-chaining, although as I am new to this, I have accidentally shifted into a cross chain position sometimes (I shift out ASAP).

I guess the other question is that if I have to pay to replace it myself, is it worth it at this point or should I wait? If replacing it is the best bet, then is it possible to just purchase the big ring (I can't seem to find just the big online)?
Don't worry too much about cross chaining, at least big/big. ALL modern drive trains are designed w/ that in mind...it will work on ANY bike. Of course the more you do it, the faster your drive train will wear, but it should work. Small/small is not generally possible w/o some rub.
 

·
Registered
Joined
·
9,657 Posts
Not the first time I've heard this story. Not that I believe it "just happened" but I've heard it before from someone with Praxis rings.

Anyway, contact Praxis and explain. I'm pretty sure Specialized will just tell you to screw without any consideration.....but from everything I've heard Praxis is a stand up company with good customer service. Not to imply they will, or should, cover it though but of the options they'd be your best bet for trying to get help, I think.
 

·
Adorable Furry Hombre
Joined
·
30,945 Posts
If you bought that new recently, (a) you need someone to show you how to shift and ride (b) see (a). How come the derailleur is so scuffed up? It looks like something has hit the outside of the derailleur.
What details have you left out?
That FD looks mounted way too high IMHO.
 

·
Registered
Joined
·
15 Posts
Discussion Starter · #18 ·
Not the first time I've heard this story. Not that I believe it "just happened" but I've heard it before from someone with Praxis rings.

Anyway, contact Praxis and explain. I'm pretty sure Specialized will just tell you to screw without any consideration.....but from everything I've heard Praxis is a stand up company with good customer service. Not to imply they will, or should, cover it though but of the options they'd be your best bet for trying to get help, I think.
In all honesty, I don't know how it happened. I'm not saying it is not my fault, only that I don't know... Just frustrating to have it happen w/n the first 2 weeks and not have a definitive answer as to how.
 

·
Registered
Joined
·
15 Posts
Discussion Starter · #19 ·
That FD looks mounted way too high IMHO.
I'd have no idea how to identify the appropriate FD height.

Could the FD being too high lead to having to double tap the shifter on big ring --> small ring transfer and vice versa? This keeps happening to me A LOT (even before the bent tooth).
 

·
Adorable Furry Hombre
Joined
·
30,945 Posts
In all honesty, I don't know how it happened. I'm not saying it is not my fault, only that I don't know... Just frustrating to have it happen w/n the first 2 weeks and not have a definitive answer as to how.
FD looks setup wrong....it over shifted as a result (looks like the bet tooth was next to a shifting ramp/pin), bending the tooth when the chain was forced improperly to derail. LBS ground the tooth down rather than admit their biff.

For giggles take a photo of the FD over the front chainring (chain on granny cog). Emphasis to capturing how much space there is between the bottom-of-the-outer-plate and the teeth. HINT: it should be only 1mm or so give or take a skoche.
 
1 - 20 of 47 Posts
Top