unknown spring?
#1
Senior Member
Thread Starter
Join Date: Feb 2016
Location: SE Wisconsin
Posts: 1,859
Bikes: Lemond '01 Maillot Jaune, Lemond '02 Victoire, Lemond '03 Poprad, Lemond '03 Wayzata DB conv(Poprad), '79 AcerMex Windsor Carrera Professional(pur new), '88 GT Tequesta(pur new), '01 Bianchi Grizzly, 1993 Trek 970 DB conv, Trek 8900 DB conv
Likes: 0
Liked 816 Times
in
474 Posts
unknown spring?
I have several bikes in the garage, two 9-speed road bikes and a drop bar converted Trek 7.5fx. All have STI-type shifters, canti brakes, front derailleurs. I just walked by the bikes and noticed this spring on the floor under one of them. There are a number of springs on bikes..but I'm not placing this one. Any idea?
I need to take them all out for a spin to see if anything isn't working, but after building a half dozen bikes, I'm drawing a blank on where it would come from.
I need to take them all out for a spin to see if anything isn't working, but after building a half dozen bikes, I'm drawing a blank on where it would come from.
#2
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 39,688
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Liked 3,523 Times
in
1,934 Posts
Practical joke.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
#3
Really Old Senior Member
Francis could be correct in that it has nothing to do with bikes.
However, I'd probably squeeze some brake levers.
However, I'd probably squeeze some brake levers.
#4
Super-duper Genius
That, and see if a derailleur tries to go immediately to the smallest gear.
Wherever it came from, it seems extraordinarily rare for a spring to pop out of place while everything is sitting static in the garage. Stuff tends to break while in use.
Wherever it came from, it seems extraordinarily rare for a spring to pop out of place while everything is sitting static in the garage. Stuff tends to break while in use.
#7
Senior Member
I have several bikes in the garage, two 9-speed road bikes and a drop bar converted Trek 7.5fx. All have STI-type shifters, canti brakes, front derailleurs. I just walked by the bikes and noticed this spring on the floor under one of them. There are a number of springs on bikes..but I'm not placing this one. Any idea?
I need to take them all out for a spin to see if anything isn't working, but after building a half dozen bikes, I'm drawing a blank on where it would come from.
I need to take them all out for a spin to see if anything isn't working, but after building a half dozen bikes, I'm drawing a blank on where it would come from.
#8
Senior Member
Join Date: Feb 2012
Location: Rochester, NY
Posts: 18,361
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
Liked 4,218 Times
in
2,486 Posts
What is the spring's ID and what bolts your bikes have that would fit? Will a der limit screw fit inside the spring snuggly? Are there any cable adjusters that use this type of spring on the bikes? The spring looks to be a tad large for typical limit screws. I question whether it's for a bike at all. Andy
__________________
AndrewRStewart
AndrewRStewart
Likes For Andrew R Stewart:
#9
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 39,688
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Liked 3,523 Times
in
1,934 Posts
Almost certainly not a limit screw. First of all, by the time the limit screw backs off enough, there would be noticeable shifting issues.
Refreshingly (because few ever do) the OP was smart enough to scale it by including a Quarter for reference. That makes it 8-10mm in diameter, so we need to limit our possibilities accordingly.
While, I said "practical joke" facetiously, I'd be looking around the garage for other items that might use such a spring, keeping in mind that there's no reason to assume it would end up close to where it fell.
Refreshingly (because few ever do) the OP was smart enough to scale it by including a Quarter for reference. That makes it 8-10mm in diameter, so we need to limit our possibilities accordingly.
While, I said "practical joke" facetiously, I'd be looking around the garage for other items that might use such a spring, keeping in mind that there's no reason to assume it would end up close to where it fell.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
#10
Sr Member on Sr bikes
#11
Senior Member
Thread Starter
Join Date: Feb 2016
Location: SE Wisconsin
Posts: 1,859
Bikes: Lemond '01 Maillot Jaune, Lemond '02 Victoire, Lemond '03 Poprad, Lemond '03 Wayzata DB conv(Poprad), '79 AcerMex Windsor Carrera Professional(pur new), '88 GT Tequesta(pur new), '01 Bianchi Grizzly, 1993 Trek 970 DB conv, Trek 8900 DB conv
Likes: 0
Liked 816 Times
in
474 Posts
Thanks to all that tried to figure this out. When I posted initially I thought either someone would immediately say "that's a spring that fits right here(followed by a pic)" or folks would end up where I was, that being, "never saw a spring like that on any typical bike part".
I think I figured it out. I rode the bikes and they are fine. While checking out the bikes I noticed a bell on my GF's 7.5fx that had no..bell..on it, but had a center stem where a bell was once mounted. No clue where the bell top went(or how to reattach it if I did find it). I started looking at a similar (same mfg) bell I had and asked myself..how would a bell be mounted to the center post? If it were bolted(hard-attached) on it wouldn't ring much. If it were mounted on top of a suspending spring..it would r-i-n-g when struck. . So..that's my guess. The bell top fell off somewhere and the spring fell off the post as I was putting the bikes away.
After looking at another bell..still no idea how it actually attached to the post below. It looks like some sort of rivet on the top, though not sure how. The replacement bell top seems very securely attached (and suspended underneath by a spring).
I think I figured it out. I rode the bikes and they are fine. While checking out the bikes I noticed a bell on my GF's 7.5fx that had no..bell..on it, but had a center stem where a bell was once mounted. No clue where the bell top went(or how to reattach it if I did find it). I started looking at a similar (same mfg) bell I had and asked myself..how would a bell be mounted to the center post? If it were bolted(hard-attached) on it wouldn't ring much. If it were mounted on top of a suspending spring..it would r-i-n-g when struck. . So..that's my guess. The bell top fell off somewhere and the spring fell off the post as I was putting the bikes away.
After looking at another bell..still no idea how it actually attached to the post below. It looks like some sort of rivet on the top, though not sure how. The replacement bell top seems very securely attached (and suspended underneath by a spring).
Likes For fishboat:
#12
Senior Member
Join Date: Feb 2012
Location: Rochester, NY
Posts: 18,361
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
Liked 4,218 Times
in
2,486 Posts
Thanks for the follow up. I would have never thought of a bell. Andy
__________________
AndrewRStewart
AndrewRStewart
#13
Senior Member
Join Date: May 2008
Location: Fredericksburg, Va
Posts: 9,711
Bikes: '65 Frejus TDF, '73 Bottecchia Giro d'Italia, '83 Colnago Superissimo, '84 Trek 610, '84 Trek 760, '88 Pinarello Veneto, '88 De Rosa Pro, '89 Pinarello Montello, '94 Burley Duet, 97 Specialized RockHopper, 2010 Langster, Tern Link D8
Liked 2,328 Times
in
1,162 Posts
The bell ( part that resonates to make the sound) is hard mounted at the center and not impact the sound. Anything touching the surface past the mounting point will, including a spring that might be touching past the mount interface.
My problem is laying down unique washers and then forgetting after several days, where they go and on what part!
My problem is laying down unique washers and then forgetting after several days, where they go and on what part!
__________________
Bikes don't stand alone. They are two tired.
Bikes don't stand alone. They are two tired.
#14
Senior Member
Thread Starter
Join Date: Feb 2016
Location: SE Wisconsin
Posts: 1,859
Bikes: Lemond '01 Maillot Jaune, Lemond '02 Victoire, Lemond '03 Poprad, Lemond '03 Wayzata DB conv(Poprad), '79 AcerMex Windsor Carrera Professional(pur new), '88 GT Tequesta(pur new), '01 Bianchi Grizzly, 1993 Trek 970 DB conv, Trek 8900 DB conv
Likes: 0
Liked 816 Times
in
474 Posts
The bell top does seem to be suspended above anything hard as it depresses maybe a few mm when I push on it. Something is attaching the stem to the bel-top inside as the spring is compressed. No doubt it's simple..for someone designing widgets.