Inner Chainring Eating My Chainstay.
08-28-09, 01:26 PM
#1
Junior Member
Thread Starter
Join Date: Aug 2009
Posts: 20
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Inner Chainring Eating My Chainstay.
Hi. I have a vintage Sakae 28 tooth inner ring on a triple crank that is not tracking evenly alongside the frame. When you look directly down into it and turn the crank, it's lopsided like a wheel out of true. With the chain on, the chain is eating the chainstay where the inner ring is tracking too closely. While I'm going to swap out the 28 tooth ring for a 24 tooth one (and probably swap out the 45 tooth middle one for something a little smaller, maybe 38), I'm wondering if this is going to solve the problem. Maybe the axle is bent? Maybe the spider is weird (not likely, I think)? How do you track down the source of the wobble? I don't think the chain stay is so rusted as to be worrisome (1984 Trek), but I'd like to stop the source and fix the rust. Thanks for any thoughts.
08-28-09, 01:28 PM
#2
Senior Member
Join Date: Jul 2007
Location: Lancaster County, PA
Posts: 5,060
Bikes: '39 Hobbs, '58 Marastoni, '73 Italian custom, '75 Wizard, '76 Wilier, '78 Tom Kellogg, '79 Colnago Super, '79 Sachs, '81 Masi Prestige, '82 Cuevas, '83 Picchio Special, '84 Murray-Serotta, '85 Trek 170, '89 Bianchi, '90 Bill Holland, '94 Grandis
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Likes: 0
Liked 11 Times
in
9 Posts
"Inner Chainring Eating My Chainstay"
Is that Jung or Freud?
Is that Jung or Freud?
08-28-09, 01:29 PM
#3
Reeks of aged cotton duck
Join Date: Oct 2007
Location: Middle Georgia, USA
Posts: 1,177
Bikes: 2008 Kogswell PR mkII, 1976 Raleigh Professional, 1996 Serotta Atlanta, 1984 Trek 520, 1979 Raleigh Comp GS
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 5 Times
in
4 Posts
Pictures would be helpful.
08-28-09, 01:35 PM
#5
Senior Member
Join Date: Oct 2006
Location: Puyallup Washington
Posts: 1,847
Bikes: Motobecane Mirage fixed gear, Nashbar Alpha Road 5000, Bianchi Grizzly, Coppi Fiorelli, , Schwinn Trike, , GT All Terra, Old Peugeot, Nishiki 3 speed, Bugatti, Cannondale Black Lightning, Dura All, Bianchi Touring, Bridgestone T700 & more
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Sounds like you may have a bent chainring and perhaps the BB spindle is a bit short...Try a spacer on the drive side cup to get yourself a MM of clearance and straighten/replace the offending chainrings.
Sturmey Archer cog spacers common to the AW rear hub work great and are cheap...
Sturmey Archer cog spacers common to the AW rear hub work great and are cheap...
08-28-09, 01:36 PM
#6
Senior Member
Join Date: Jul 2007
Location: Lancaster County, PA
Posts: 5,060
Bikes: '39 Hobbs, '58 Marastoni, '73 Italian custom, '75 Wizard, '76 Wilier, '78 Tom Kellogg, '79 Colnago Super, '79 Sachs, '81 Masi Prestige, '82 Cuevas, '83 Picchio Special, '84 Murray-Serotta, '85 Trek 170, '89 Bianchi, '90 Bill Holland, '94 Grandis
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Likes: 0
Liked 11 Times
in
9 Posts
08-28-09, 02:28 PM
#7
Senior Member
Join Date: Jul 2009
Posts: 11,138
Bikes: 1986 Alan Record Carbonio, 1985 Vitus Plus Carbone 7, 1984 Peugeot PSV, 1972 Line Seeker, 1986(est.) Medici Aerodynamic (Project), 1985(est.) Peugeot PY10FC
Mentioned: 22 Post(s)
Tagged: 0 Thread(s)
Quoted: 150 Post(s)
Likes: 0
Liked 31 Times
in
26 Posts
08-28-09, 02:33 PM
#8
Senior Member
Join Date: Jul 2007
Location: Lancaster County, PA
Posts: 5,060
Bikes: '39 Hobbs, '58 Marastoni, '73 Italian custom, '75 Wizard, '76 Wilier, '78 Tom Kellogg, '79 Colnago Super, '79 Sachs, '81 Masi Prestige, '82 Cuevas, '83 Picchio Special, '84 Murray-Serotta, '85 Trek 170, '89 Bianchi, '90 Bill Holland, '94 Grandis
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Likes: 0
Liked 11 Times
in
9 Posts
