Is this new chainring trashed?
#1
Senior Member
Thread Starter
Is this new chainring trashed?
Dramatic title for attention :-). I just bought this from a guy, and it has zero miles on it. He did try to mount it on his cranks but it wasn’t a fit. I just realized that one of the bolt holes is separated and doesn’t sit flush. He’s a good guy and has offered a refund. Didn’t realize it was affected when he tried to fit it. My question is, will it still work okay and is it safe? The part of the ring that is separated doesn’t sit flush (maybe due to adhesive spots not lining up). Help appreciated. If it helps, the ring is a Shimano SLX M7000. About $25 or $30 new, paid $10. Mounting on FSA crankset.
Last edited by Plainsman; 04-22-20 at 03:45 PM. Reason: Add photos
#4
Senior Member
Thread Starter
#5
Senior Member
Join Date: Jun 2002
Location: San Jose, CA
Posts: 3,692
Bikes: Too many bikes, too little time to ride
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 432 Post(s)
Liked 461 Times
in
318 Posts
Not familiar with this chainring but I'd be willing to give it a try. Install it and see how it goes. Are you able to push the pieces together using pliers?
#6
Senior Member
Thread Starter
There looks to maybe be some type of adhesive or something where the two pieces were joined. I was concerned that putting some type of clamp on it (the area available for clamping/pliers is small) would deform the ring before pressing it back together. That gap you see, I can’t tell 100% if that’s caused by left over residue not mating properly between pieces, or if the top portion actually was deformed somehow. I didn’t even know this bolt “sleeve” was a two part component - can’t imagine the benefit of that.
#8
Dangerous Old Man
There looks to maybe be some type of adhesive or something where the two pieces were joined. I was concerned that putting some type of clamp on it (the area available for clamping/pliers is small) would deform the ring before pressing it back together. That gap you see, I can’t tell 100% if that’s caused by left over residue not mating properly between pieces, or if the top portion actually was deformed somehow. I didn’t even know this bolt “sleeve” was a two part component - can’t imagine the benefit of that.
#9
Senior Member
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,656
Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!
Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 2026 Post(s)
Likes: 0
Liked 1,096 Times
in
742 Posts
As shown. Don't use unprotected jaws or you will mar the chainring.
#10
Senior Member
Thread Starter
#11
Senior Member
Thread Starter
Just talked to Shimano tech support and shared pics. They couldn’t / wouldn’t say safe to use and suggested I send it in warranty evaluation. Since I’m not even the first Owner I’ll just return it to the guy I bought it from. The tech I spoke with also wasn’t familiar with why it would have a two-part bolt sleeve.
#12
Old fart
Join Date: Nov 2004
Location: Appleton WI
Posts: 24,792
Bikes: Several, mostly not name brands.
Mentioned: 153 Post(s)
Tagged: 0 Thread(s)
Quoted: 3591 Post(s)
Liked 3,401 Times
in
1,935 Posts
#13
Senior Member
Thread Starter
#14
Senior Member
Looks like an over complicated & overpriced POS chain ring to me. I'm an advocate of Vuelta & FSA chainrings. Be good. Have Fun.
#15
Senior Member
Does it even fit? M7000 uses 96mm proprietary nonsymmetricsl BCD. I doubt FSA makes non-standard cranks.
I may be wrong and they could have made something unusual.
I may be wrong and they could have made something unusual.
#16
Senior Member
Join Date: Jan 2009
Location: San Diego, CA
Posts: 3,677
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 839 Post(s)
Liked 1,064 Times
in
747 Posts
I say send it back to Shimano. You get a new chainring and it may help Shimano find a potential issue with their manufacturing or quality control. I received a cassette once with two of the same size cogs in it and Shimano headquarters in Japan wanted it back in a big way. Very good customer service IMO.