Sugino VP triple question
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Sugino VP triple question
Okay everybody, bear with me, but I’ve got another stupid question about a component on the 87 Hardrock that I’ve been going through. First of all, this thing has been ridden maybe 20 miles, so I assume it’s untouched, but you never know. This is a 6 speed bike, round rings.
I’ve never seen spacers in an OE crank, but this one had thin washers spacing the middle ring away from the big ring. Then, the granny was flipped around so the lettering faced inward, another thing I’ve never seen. Of course, there are so many things that I’ve never seen, so I thought I’d ask! I does seem like Specialized was mixing and matching parts like crazy, so maybe this was some sort of mod? All of the Stumpjumpers from this year had Biopace.
I’ve never seen spacers in an OE crank, but this one had thin washers spacing the middle ring away from the big ring. Then, the granny was flipped around so the lettering faced inward, another thing I’ve never seen. Of course, there are so many things that I’ve never seen, so I thought I’d ask! I does seem like Specialized was mixing and matching parts like crazy, so maybe this was some sort of mod? All of the Stumpjumpers from this year had Biopace.
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I went through a pile of mtb triple cranks the other day, and I noticed that all of the cranks having thin (cheap) middle rings also had 1.25mm spacers under the middle ring tabs.
None of the ones with higher-quality, thicker chanrings had these spacers.
There was also a big change in chain width when 7s chain arrived, but here I think that the spacers would have not adjusted the chainring spacing in the right direction since chainrings were moving closer together not further apart. Still, it's possible that the spacers would have allowed the factory to tailor cranksets for use with standard- or narrow-width chain.
None of the ones with higher-quality, thicker chanrings had these spacers.
There was also a big change in chain width when 7s chain arrived, but here I think that the spacers would have not adjusted the chainring spacing in the right direction since chainrings were moving closer together not further apart. Still, it's possible that the spacers would have allowed the factory to tailor cranksets for use with standard- or narrow-width chain.
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I have a vintage Hardrock with this crank set this crank shouldn't have spacers on the big or middle ring these are a after market mod, the only spacers are are the ones on the granny if there not cast in they Sugino changed the casting during the production run so some have spacers and some don't and all the chain rings should have the labeling facing outtward on these Sugino strait rings it was fairly common to flip slightly worn chain rings to get more life out of the rings. If it was working good and shifting nicely when you took it apart I would suggest you put it back together the way you got with the spacers.
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I've seen spacers like this on more than a few triple cranks from that era. I assumed they were OE. I am rebuilding a 1991 Specialized Rockhopper. The Mountain LX crank has spacers just like this. I'm reasonably confident that these were original to the bike.
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I went through a pile of mtb triple cranks the other day, and I noticed that all of the cranks having thin (cheap) middle rings also had 1.25mm spacers under the middle ring tabs.
None of the ones with higher-quality, thicker chanrings had these spacers.
There was also a big change in chain width when 7s chain arrived, but here I think that the spacers would have not adjusted the chainring spacing in the right direction since chainrings were moving closer together not further apart. Still, it's possible that the spacers would have allowed the factory to tailor cranksets for use with standard- or narrow-width chain.
None of the ones with higher-quality, thicker chanrings had these spacers.
There was also a big change in chain width when 7s chain arrived, but here I think that the spacers would have not adjusted the chainring spacing in the right direction since chainrings were moving closer together not further apart. Still, it's possible that the spacers would have allowed the factory to tailor cranksets for use with standard- or narrow-width chain.
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I have a vintage Hardrock with this crank set this crank shouldn't have spacers on the big or middle ring these are a after market mod, the only spacers are are the ones on the granny if there not cast in they Sugino changed the casting during the production run so some have spacers and some don't and all the chain rings should have the labeling facing outtward on these Sugino strait rings it was fairly common to flip slightly worn chain rings to get more life out of the rings. If it was working good and shifting nicely when you took it apart I would suggest you put it back together the way you got with the spacers.
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Maybe they were trying to prevent chainring rub on “new” 6 speed freewheels, which would have been wider? I was just wondering if it was something that the guys at Bike & Hike Would have done.
#8
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My experience is that spacers on the inner/middle rings was not uncommon in the 1980's. Not the majority of them, but I am never surprised when i come across them.
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Does the granny ring have indentations in the bolt holes on either surface? If one side does, that would tell you if the ring had actually been flipped.
Is the front shifter indexed or friction?
Is the front shifter indexed or friction?
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The front shifters on a late 80's Hardrock would be a friction thumby.
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Two thoughts as to how this might have occurred. (The flipped inner ring and the spacers between middle ring and spider.)
First (pure guess, but Sugino has always struck me as a company with their ear to the ground WRT bike manufacturing trends. I'm guessing this crankset was made for the transition from the 5,6-speed 3/32" chains of the '70s to the 7,8-speed narrow chains of the '80s Sugino knows there are still holdouts using the old FW standard and 3/32" chains. So they retool or start machining off a tad of web to the new standard and simply add those washers to retrofit them for 3/32'. All the cranks go down one assembly line until chainring assembly. Then 80% continue on and 20% get separated out. 80% get rings, no washers. 20% get washers and different, 5,6-speed packaging.
As for the the inner ring's lettering in the inside? Well the recess is inside also so apparently Sugino intended that. (I know from working on a lot of triples that seeing the stamped tooth size on an inner ring from the outside is hard. I usually have to get a flashlight. Sugino was doing bike shop mechanics a favor.
So, if you are running old-school 5,6-speed FW and chain, keep the washers. If you re upgrading to 7,8-speed and the narrower chain, take them out.
Funny but I just installed a similar year crankset on my best 9-speed bike because those old cranks had straight arms and the old square taper spindles and allow tailoring to get very low Q-factors, even running a triple. (Think knees!) (Q-factor, the distance apart the outsides of the cranks are at the pedals, ie how bowlegged you are while riding.) Now going old 3/32" standard to 9-speed presented challenges. Inside ring is far enough in that that no derailleur I have found yet would sift on to it. I beat that one by adding a thin plate inside the outer cage so it pushed the chain in sooner and further. Works with a lot of chain rub. (I have a better approach coming but it requires machined parts.)
Second challenge was the no-mans land between the middle and outer chainrings, Outer to middle was not a reliable or predictable shift. Obviously I needed pins or ramps or something to keep the chain from falling into that space. Well the rings are a mishmash of models and brands. Outer is a very thick Shimano ring, probably of many years ago. So I drilled 4 holes in it and ran screws and Nylocks from the inside so the heads were at the space. Dremelled the heads to a nice ramp guiding the chain out to the middle ring. Works nicely but looks far, far from ordinary! Knees love it.. (And for Q-factor freaks - 144. On a 50-38-23. Chainline is 42. Running straight, stock Campy 9-speed in back. 130. I have the BB spindle to go 5mm closed but that is - at least of now - far out of the range of FDs.)
I love the old cranksets because there is so much you can do with them. But it does take its fair share of assemble, try it out, remove, tweak and repeat. Good BB tools make the process a lot more fun!
Ben
First (pure guess, but Sugino has always struck me as a company with their ear to the ground WRT bike manufacturing trends. I'm guessing this crankset was made for the transition from the 5,6-speed 3/32" chains of the '70s to the 7,8-speed narrow chains of the '80s Sugino knows there are still holdouts using the old FW standard and 3/32" chains. So they retool or start machining off a tad of web to the new standard and simply add those washers to retrofit them for 3/32'. All the cranks go down one assembly line until chainring assembly. Then 80% continue on and 20% get separated out. 80% get rings, no washers. 20% get washers and different, 5,6-speed packaging.
As for the the inner ring's lettering in the inside? Well the recess is inside also so apparently Sugino intended that. (I know from working on a lot of triples that seeing the stamped tooth size on an inner ring from the outside is hard. I usually have to get a flashlight. Sugino was doing bike shop mechanics a favor.
So, if you are running old-school 5,6-speed FW and chain, keep the washers. If you re upgrading to 7,8-speed and the narrower chain, take them out.
Funny but I just installed a similar year crankset on my best 9-speed bike because those old cranks had straight arms and the old square taper spindles and allow tailoring to get very low Q-factors, even running a triple. (Think knees!) (Q-factor, the distance apart the outsides of the cranks are at the pedals, ie how bowlegged you are while riding.) Now going old 3/32" standard to 9-speed presented challenges. Inside ring is far enough in that that no derailleur I have found yet would sift on to it. I beat that one by adding a thin plate inside the outer cage so it pushed the chain in sooner and further. Works with a lot of chain rub. (I have a better approach coming but it requires machined parts.)
Second challenge was the no-mans land between the middle and outer chainrings, Outer to middle was not a reliable or predictable shift. Obviously I needed pins or ramps or something to keep the chain from falling into that space. Well the rings are a mishmash of models and brands. Outer is a very thick Shimano ring, probably of many years ago. So I drilled 4 holes in it and ran screws and Nylocks from the inside so the heads were at the space. Dremelled the heads to a nice ramp guiding the chain out to the middle ring. Works nicely but looks far, far from ordinary! Knees love it.. (And for Q-factor freaks - 144. On a 50-38-23. Chainline is 42. Running straight, stock Campy 9-speed in back. 130. I have the BB spindle to go 5mm closed but that is - at least of now - far out of the range of FDs.)
I love the old cranksets because there is so much you can do with them. But it does take its fair share of assemble, try it out, remove, tweak and repeat. Good BB tools make the process a lot more fun!
Ben
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Two thoughts as to how this might have occurred. (The flipped inner ring and the spacers between middle ring and spider.)
First (pure guess, but Sugino has always struck me as a company with their ear to the ground WRT bike manufacturing trends. I'm guessing this crankset was made for the transition from the 5,6-speed 3/32" chains of the '70s to the 7,8-speed narrow chains of the '80s Sugino knows there are still holdouts using the old FW standard and 3/32" chains. So they retool or start machining off a tad of web to the new standard and simply add those washers to retrofit them for 3/32'. All the cranks go down one assembly line until chainring assembly. Then 80% continue on and 20% get separated out. 80% get rings, no washers. 20% get washers and different, 5,6-speed packaging.
As for the the inner ring's lettering in the inside? Well the recess is inside also so apparently Sugino intended that. (I know from working on a lot of triples that seeing the stamped tooth size on an inner ring from the outside is hard. I usually have to get a flashlight. Sugino was doing bike shop mechanics a favor.
So, if you are running old-school 5,6-speed FW and chain, keep the washers. If you re upgrading to 7,8-speed and the narrower chain, take them out.
Funny but I just installed a similar year crankset on my best 9-speed bike because those old cranks had straight arms and the old square taper spindles and allow tailoring to get very low Q-factors, even running a triple. (Think knees!) (Q-factor, the distance apart the outsides of the cranks are at the pedals, ie how bowlegged you are while riding.) Now going old 3/32" standard to 9-speed presented challenges. Inside ring is far enough in that that no derailleur I have found yet would sift on to it. I beat that one by adding a thin plate inside the outer cage so it pushed the chain in sooner and further. Works with a lot of chain rub. (I have a better approach coming but it requires machined parts.)
Second challenge was the no-mans land between the middle and outer chainrings, Outer to middle was not a reliable or predictable shift. Obviously I needed pins or ramps or something to keep the chain from falling into that space. Well the rings are a mishmash of models and brands. Outer is a very thick Shimano ring, probably of many years ago. So I drilled 4 holes in it and ran screws and Nylocks from the inside so the heads were at the space. Dremelled the heads to a nice ramp guiding the chain out to the middle ring. Works nicely but looks far, far from ordinary! Knees love it.. (And for Q-factor freaks - 144. On a 50-38-23. Chainline is 42. Running straight, stock Campy 9-speed in back. 130. I have the BB spindle to go 5mm closed but that is - at least of now - far out of the range of FDs.)
I love the old cranksets because there is so much you can do with them. But it does take its fair share of assemble, try it out, remove, tweak and repeat. Good BB tools make the process a lot more fun!
Ben
First (pure guess, but Sugino has always struck me as a company with their ear to the ground WRT bike manufacturing trends. I'm guessing this crankset was made for the transition from the 5,6-speed 3/32" chains of the '70s to the 7,8-speed narrow chains of the '80s Sugino knows there are still holdouts using the old FW standard and 3/32" chains. So they retool or start machining off a tad of web to the new standard and simply add those washers to retrofit them for 3/32'. All the cranks go down one assembly line until chainring assembly. Then 80% continue on and 20% get separated out. 80% get rings, no washers. 20% get washers and different, 5,6-speed packaging.
As for the the inner ring's lettering in the inside? Well the recess is inside also so apparently Sugino intended that. (I know from working on a lot of triples that seeing the stamped tooth size on an inner ring from the outside is hard. I usually have to get a flashlight. Sugino was doing bike shop mechanics a favor.
So, if you are running old-school 5,6-speed FW and chain, keep the washers. If you re upgrading to 7,8-speed and the narrower chain, take them out.
Funny but I just installed a similar year crankset on my best 9-speed bike because those old cranks had straight arms and the old square taper spindles and allow tailoring to get very low Q-factors, even running a triple. (Think knees!) (Q-factor, the distance apart the outsides of the cranks are at the pedals, ie how bowlegged you are while riding.) Now going old 3/32" standard to 9-speed presented challenges. Inside ring is far enough in that that no derailleur I have found yet would sift on to it. I beat that one by adding a thin plate inside the outer cage so it pushed the chain in sooner and further. Works with a lot of chain rub. (I have a better approach coming but it requires machined parts.)
Second challenge was the no-mans land between the middle and outer chainrings, Outer to middle was not a reliable or predictable shift. Obviously I needed pins or ramps or something to keep the chain from falling into that space. Well the rings are a mishmash of models and brands. Outer is a very thick Shimano ring, probably of many years ago. So I drilled 4 holes in it and ran screws and Nylocks from the inside so the heads were at the space. Dremelled the heads to a nice ramp guiding the chain out to the middle ring. Works nicely but looks far, far from ordinary! Knees love it.. (And for Q-factor freaks - 144. On a 50-38-23. Chainline is 42. Running straight, stock Campy 9-speed in back. 130. I have the BB spindle to go 5mm closed but that is - at least of now - far out of the range of FDs.)
I love the old cranksets because there is so much you can do with them. But it does take its fair share of assemble, try it out, remove, tweak and repeat. Good BB tools make the process a lot more fun!
Ben
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Thanks for all the observations, everyone. So cool to be able to tap the collective memory.
Last edited by JacobLee; 07-31-20 at 06:25 PM.
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Two thoughts as to how this might have occurred. (The flipped inner ring and the spacers between middle ring and spider.)
First (pure guess, but Sugino has always struck me as a company with their ear to the ground WRT bike manufacturing trends. I'm guessing this crankset was made for the transition from the 5,6-speed 3/32" chains of the '70s to the 7,8-speed narrow chains of the '80s Sugino knows there are still holdouts using the old FW standard and 3/32" chains. So they retool or start machining off a tad of web to the new standard and simply add those washers to retrofit them for 3/32'. All the cranks go down one assembly line until chainring assembly. Then 80% continue on and 20% get separated out. 80% get rings, no washers. 20% get washers and different, 5,6-speed packaging.
As for the the inner ring's lettering in the inside? Well the recess is inside also so apparently Sugino intended that. (I know from working on a lot of triples that seeing the stamped tooth size on an inner ring from the outside is hard. I usually have to get a flashlight. Sugino was doing bike shop mechanics a favor.
So, if you are running old-school 5,6-speed FW and chain, keep the washers. If you re upgrading to 7,8-speed and the narrower chain, take them out.
Funny but I just installed a similar year crankset on my best 9-speed bike because those old cranks had straight arms and the old square taper spindles and allow tailoring to get very low Q-factors, even running a triple. (Think knees!) (Q-factor, the distance apart the outsides of the cranks are at the pedals, ie how bowlegged you are while riding.) Now going old 3/32" standard to 9-speed presented challenges. Inside ring is far enough in that that no derailleur I have found yet would sift on to it. I beat that one by adding a thin plate inside the outer cage so it pushed the chain in sooner and further. Works with a lot of chain rub. (I have a better approach coming but it requires machined parts.)
Second challenge was the no-mans land between the middle and outer chainrings, Outer to middle was not a reliable or predictable shift. Obviously I needed pins or ramps or something to keep the chain from falling into that space. Well the rings are a mishmash of models and brands. Outer is a very thick Shimano ring, probably of many years ago. So I drilled 4 holes in it and ran screws and Nylocks from the inside so the heads were at the space. Dremelled the heads to a nice ramp guiding the chain out to the middle ring. Works nicely but looks far, far from ordinary! Knees love it.. (And for Q-factor freaks - 144. On a 50-38-23. Chainline is 42. Running straight, stock Campy 9-speed in back. 130. I have the BB spindle to go 5mm closed but that is - at least of now - far out of the range of FDs.)
I love the old cranksets because there is so much you can do with them. But it does take its fair share of assemble, try it out, remove, tweak and repeat. Good BB tools make the process a lot more fun!
Ben
First (pure guess, but Sugino has always struck me as a company with their ear to the ground WRT bike manufacturing trends. I'm guessing this crankset was made for the transition from the 5,6-speed 3/32" chains of the '70s to the 7,8-speed narrow chains of the '80s Sugino knows there are still holdouts using the old FW standard and 3/32" chains. So they retool or start machining off a tad of web to the new standard and simply add those washers to retrofit them for 3/32'. All the cranks go down one assembly line until chainring assembly. Then 80% continue on and 20% get separated out. 80% get rings, no washers. 20% get washers and different, 5,6-speed packaging.
As for the the inner ring's lettering in the inside? Well the recess is inside also so apparently Sugino intended that. (I know from working on a lot of triples that seeing the stamped tooth size on an inner ring from the outside is hard. I usually have to get a flashlight. Sugino was doing bike shop mechanics a favor.
So, if you are running old-school 5,6-speed FW and chain, keep the washers. If you re upgrading to 7,8-speed and the narrower chain, take them out.
Funny but I just installed a similar year crankset on my best 9-speed bike because those old cranks had straight arms and the old square taper spindles and allow tailoring to get very low Q-factors, even running a triple. (Think knees!) (Q-factor, the distance apart the outsides of the cranks are at the pedals, ie how bowlegged you are while riding.) Now going old 3/32" standard to 9-speed presented challenges. Inside ring is far enough in that that no derailleur I have found yet would sift on to it. I beat that one by adding a thin plate inside the outer cage so it pushed the chain in sooner and further. Works with a lot of chain rub. (I have a better approach coming but it requires machined parts.)
Second challenge was the no-mans land between the middle and outer chainrings, Outer to middle was not a reliable or predictable shift. Obviously I needed pins or ramps or something to keep the chain from falling into that space. Well the rings are a mishmash of models and brands. Outer is a very thick Shimano ring, probably of many years ago. So I drilled 4 holes in it and ran screws and Nylocks from the inside so the heads were at the space. Dremelled the heads to a nice ramp guiding the chain out to the middle ring. Works nicely but looks far, far from ordinary! Knees love it.. (And for Q-factor freaks - 144. On a 50-38-23. Chainline is 42. Running straight, stock Campy 9-speed in back. 130. I have the BB spindle to go 5mm closed but that is - at least of now - far out of the range of FDs.)
I love the old cranksets because there is so much you can do with them. But it does take its fair share of assemble, try it out, remove, tweak and repeat. Good BB tools make the process a lot more fun!
Ben