Loose lockring on SRAM PG1070 Cassette
01-03-10, 12:49 AM
#1
fuggitivo solitario
Thread Starter
Loose lockring on SRAM PG1070 Cassette
So i was cleaning my bike after it picked up quite a bit of gunk. As i was removing the rear QR, i realized the cassette lockring was lose & this part (see pictures below) fell out. I have no idea what it is, other than the fact that it is slightly bent out of shape. I originally thought it went between the lockring & the 11t cog, but that wasn't the case. All the spacers are still there, does anyone know what this might be. (note, i broke the thing while fiddling with it)
Side view
Head-on view
Also, anyone else had their lockring unlock by itself? The outer surface of the lockring was heavily scratched. It occurred to me that that the RD problem i was having for the last month could be due to this. The cassette seems to be serviceable for now, but im getting a new pg1070 asap
Side view
Head-on view
Also, anyone else had their lockring unlock by itself? The outer surface of the lockring was heavily scratched. It occurred to me that that the RD problem i was having for the last month could be due to this. The cassette seems to be serviceable for now, but im getting a new pg1070 asap
01-03-10, 01:20 AM
#2
Senior Member
Join Date: Jul 2002
Posts: 6,956
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 6 Times
in
5 Posts
That's a wafer-thin washer that sits under the rim of the lockring. If your lockring came loose by itself, it's virtually certain that it was not tightened enough when it was installed. As the lockring says on it, they're supposed to be tightened to 40 N-m, which is "quite tight" in layman's terms 
You can use your existing lockring without the wafer-washer to get you by until your new one arrives.
You can use your existing lockring without the wafer-washer to get you by until your new one arrives.
01-03-10, 03:27 AM
#3
cab horn
Join Date: Jun 2004
Location: Toronto
Posts: 28,353
Bikes: 1987 Bianchi Campione
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 42 Post(s)
Likes: 0
Liked 25 Times
in
18 Posts
That's a wafer-thin washer that sits under the rim of the lockring. If your lockring came loose by itself, it's virtually certain that it was not tightened enough when it was installed. As the lockring says on it, they're supposed to be tightened to 40 N-m, which is "quite tight" in layman's terms
You can use your existing lockring without the wafer-washer to get you by until your new one arrives.
You can use your existing lockring without the wafer-washer to get you by until your new one arrives.
01-03-10, 10:35 AM
#4
fuggitivo solitario
Thread Starter
That's a wafer-thin washer that sits under the rim of the lockring. If your lockring came loose by itself, it's virtually certain that it was not tightened enough when it was installed. As the lockring says on it, they're supposed to be tightened to 40 N-m, which is "quite tight" in layman's terms
You can use your existing lockring without the wafer-washer to get you by until your new one arrives.
You can use your existing lockring without the wafer-washer to get you by until your new one arrives.
01-03-10, 12:13 PM
#5
Senior Member
Join Date: Jul 2002
Posts: 6,956
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 6 Times
in
5 Posts
but it needs to be tight enough.
