Is this possible?
07-25-08, 04:18 PM
#1
Senior Member
Thread Starter
Join Date: Jun 2008
Location: Scottsbluff, Nebraska
Posts: 267
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Is this possible?
I like my "vintage" steel frame bike too much to buy a new one, and I am looking to convert to STI brifters instead of my downtube shifters. I have a Centurion Lemans RS 6speed cassette. Is this a silly thing to do? expected price?
07-25-08, 04:20 PM
#2
I like my car
Join Date: Apr 2008
Location: Philadelphia, PA
Posts: 1,747
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
I've seen it done on here before, the cables are rerouted through some kind of bridge where the downtube shifters would be and then up to the shifters.
07-25-08, 04:21 PM
#3
Senior Member
Thread Starter
Join Date: Jun 2008
Location: Scottsbluff, Nebraska
Posts: 267
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
oh and a website/phone number to where i could get the parts. or just a list of the parts
07-25-08, 04:43 PM
#4
Super Moderator
Join Date: Jul 2004
Location: Ffld Cnty Connecticut
Posts: 21,843
Bikes: Old Steelies I made, Old Cannondales
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1173 Post(s)
Liked 927 Times
in
612 Posts
If you go to brifters, I think you will need a compatible rear wheel with cassette. If you want older used 8 speed, you need an 8 speed brifter & 8 speed rear wheel. Or 9 speed brifter & 9 speed wheel .... I don't think a brifter will work with your existing wheel because the freewheel spacing does not match the spacing of the indexes in the brifter.
You need to narrow down what you want, then ask more specific questions.
__________________
Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike.
FYI: https://www.bikeforums.net/forum-sugg...ad-please.html
Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike.
FYI: https://www.bikeforums.net/forum-sugg...ad-please.html
07-25-08, 04:49 PM
#5
Senior Member
Thread Starter
Join Date: Jun 2008
Location: Scottsbluff, Nebraska
Posts: 267
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Alright... Will a 8 or 9 speed cassette replace my 6 speed? im willing to change my rear derailleur and chain. I'm looking for Shimano it doesnt really matter if it is Sora or Tiagra or 105, any of those would be an upgrade to my current setup
07-25-08, 04:55 PM
#6
Senior Member
Join Date: May 2007
Location: Santa Cruz Mountains
Posts: 6,169
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
See https://www.sheldonbrown.com/k7.html for hub info. If you have a 6sp Uniglide then you will need to do some machining or filing, or buy a new rear wheel.
Franky, the Centurion wasn't all that great a frame back in the day. If you like it for sentimental value, fine, but considering the number of parts you'll need to change to get close to modern, it may be cheaper to buy a new bike. Depends on your scavenging skills.
Franky, the Centurion wasn't all that great a frame back in the day. If you like it for sentimental value, fine, but considering the number of parts you'll need to change to get close to modern, it may be cheaper to buy a new bike. Depends on your scavenging skills.
07-25-08, 05:09 PM
#7
Senior Member
Join Date: Jun 2008
Location: St. Louis
Posts: 853
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
My 'old man' rides a 1983 steel frame Terranaut that he considered replacing last year. Instead of spending $4k on a new bike, he stuck with what he liked and knew fit him perfectly.
He upgraded every component on the bike to Ultegra. Downtube shifters to brifters, cassette, crank, brakes, hubs, wheels, pedals... everything. He says it's like a brand new bike, and regrets not doing it earlier.
He spent $1300 total, including install. Check out PBK for component group in your price range.
He upgraded every component on the bike to Ultegra. Downtube shifters to brifters, cassette, crank, brakes, hubs, wheels, pedals... everything. He says it's like a brand new bike, and regrets not doing it earlier.
He spent $1300 total, including install. Check out PBK for component group in your price range.
07-25-08, 05:12 PM
#8
Senior Member
Join Date: Jan 2006
Location: Camino, CA
Posts: 1,181
Bikes: Trek 5500 OCLV, Trek Fuel EX 9
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Sorry, that frame was fairly entry level in the Centurion lineup and is not worth the upgrade to brifters in my opinion.
07-25-08, 05:12 PM
#9
Batüwü Creakcreak
Join Date: Jan 2007
Location: The illadelph
Posts: 20,791
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 229 Post(s)
Liked 288 Times
in
160 Posts
Here's my conversion. A 1984 trek 760 that had downtube shifters to a campy brifter setup. (This ones for you acorn 
)
For a parts list, you'll need shifters, RD, chain, cassette, and wheelset. You might be able to make do with the FD and crank. I'd try it first that way before making any changes. You should know that you'll need to pull the dropouts apart a little to fit the wheel in, so a little force is fine for steel.
You should check if the chain would fall through the gap between the chainrings on your crank. It's a good possibility that it might, so budget for a crank and bottom bracket as well.
It might be cheaper to just buy a full 105 or rival groupset or a campy groupset if thats what you want.
)For a parts list, you'll need shifters, RD, chain, cassette, and wheelset. You might be able to make do with the FD and crank. I'd try it first that way before making any changes. You should know that you'll need to pull the dropouts apart a little to fit the wheel in, so a little force is fine for steel.
You should check if the chain would fall through the gap between the chainrings on your crank. It's a good possibility that it might, so budget for a crank and bottom bracket as well.
It might be cheaper to just buy a full 105 or rival groupset or a campy groupset if thats what you want.
07-25-08, 05:30 PM
#10
Senior Member
Thread Starter
Join Date: Jun 2008
Location: Scottsbluff, Nebraska
Posts: 267
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
See https://www.sheldonbrown.com/k7.html for hub info. If you have a 6sp Uniglide then you will need to do some machining or filing, or buy a new rear wheel.
Franky, the Centurion wasn't all that great a frame back in the day. If you like it for sentimental value, fine, but considering the number of parts you'll need to change to get close to modern, it may be cheaper to buy a new bike. Depends on your scavenging skills.
Franky, the Centurion wasn't all that great a frame back in the day. If you like it for sentimental value, fine, but considering the number of parts you'll need to change to get close to modern, it may be cheaper to buy a new bike. Depends on your scavenging skills.
08-12-13, 11:00 AM
#11
Senior Member
Join Date: Mar 2013
Location: St. Louis, MO
Posts: 71
Bikes: '11 Giant Defy2, '05 Salsa Las Cruces, '94 Schwinn Passage and '86 Schwinn Sprint
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
keep your old bike as is.
Start hunting craigslist for a possible project. Find a donor bike with nice components, then find a frame to swap the parts over to.
Much cheaper than getting anything from the store
Start hunting craigslist for a possible project. Find a donor bike with nice components, then find a frame to swap the parts over to.
Much cheaper than getting anything from the store
08-12-13, 11:56 AM
#12
pan y agua
Join Date: Aug 2005
Location: Jacksonville
Posts: 31,303
Bikes: Willier Zero 7; Merlin Extralight; Calfee Dragonfly tandem, Calfee Adventure tandem; Cervelo P2; Motebecane Ti Fly 29er; Motebecanne Phantom Cross; Schwinn Paramount Track bike
Mentioned: 17 Post(s)
Tagged: 0 Thread(s)
Quoted: 1447 Post(s)
Liked 727 Times
in
372 Posts
Assuming you have braze on bosses for your down tube shifters, this is the key little part ( or one like it ) that you need.
https://www.bikepartsexpress.com/mm5/...FchaMgod2HsATA
I converted a Schwinn Paramount OS from 7 speed D/T shifters, to 9 speed brifters. It wasn't a big deal, and it worked fine. But I did it with a used group I already had, and it was a pretty expensive frame, in pristine condition.
I wouldn't put a lot of money in doing the conversion, where I had to buy parts new, needed new wheels, and had to cold set the frame, unless I was really in love with the frame.
Buying a newer used bike with 9 speed brifters would be a more cost effective choice.
https://www.bikepartsexpress.com/mm5/...FchaMgod2HsATA
I converted a Schwinn Paramount OS from 7 speed D/T shifters, to 9 speed brifters. It wasn't a big deal, and it worked fine. But I did it with a used group I already had, and it was a pretty expensive frame, in pristine condition.
I wouldn't put a lot of money in doing the conversion, where I had to buy parts new, needed new wheels, and had to cold set the frame, unless I was really in love with the frame.
Buying a newer used bike with 9 speed brifters would be a more cost effective choice.
__________________
You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.
You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.
08-12-13, 11:59 AM
#13
Super Moderator
Join Date: Jul 2004
Location: Ffld Cnty Connecticut
Posts: 21,843
Bikes: Old Steelies I made, Old Cannondales
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1173 Post(s)
Liked 927 Times
in
612 Posts
OP has probably made a decision in the 5 years since the thread was started.
__________________
Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike.
FYI: https://www.bikeforums.net/forum-sugg...ad-please.html
Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike.
FYI: https://www.bikeforums.net/forum-sugg...ad-please.html
08-12-13, 12:05 PM
#14
Senior Member
Join Date: Jul 2012
Posts: 429
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
My 'old man' rides a 1983 steel frame Terranaut that he considered replacing last year. Instead of spending $4k on a new bike, he stuck with what he liked and knew fit him perfectly.
He upgraded every component on the bike to Ultegra. Downtube shifters to brifters, cassette, crank, brakes, hubs, wheels, pedals... everything. He says it's like a brand new bike, and regrets not doing it earlier.
He spent $1300 total, including install. Check out PBK for component group in your price range.
He upgraded every component on the bike to Ultegra. Downtube shifters to brifters, cassette, crank, brakes, hubs, wheels, pedals... everything. He says it's like a brand new bike, and regrets not doing it earlier.
He spent $1300 total, including install. Check out PBK for component group in your price range.
08-12-13, 12:09 PM
#15
pan y agua
Join Date: Aug 2005
Location: Jacksonville
Posts: 31,303
Bikes: Willier Zero 7; Merlin Extralight; Calfee Dragonfly tandem, Calfee Adventure tandem; Cervelo P2; Motebecane Ti Fly 29er; Motebecanne Phantom Cross; Schwinn Paramount Track bike
Mentioned: 17 Post(s)
Tagged: 0 Thread(s)
Quoted: 1447 Post(s)
Liked 727 Times
in
372 Posts
08-12-13, 12:35 PM
#16
Super Moderator
Join Date: Jul 2004
Location: Ffld Cnty Connecticut
Posts: 21,843
Bikes: Old Steelies I made, Old Cannondales
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1173 Post(s)
Liked 927 Times
in
612 Posts
Assuming you have braze on bosses for your down tube shifters, this is the key little part ( or one like it ) that you need.
https://www.bikepartsexpress.com/mm5/...FchaMgod2HsATA
I converted a Schwinn Paramount OS from 7 speed D/T shifters, to 9 speed brifters. It wasn't a big deal, and it worked fine. But I did it with a used group I already had, and it was a pretty expensive frame, in pristine condition.
I wouldn't put a lot of money in doing the conversion, where I had to buy parts new, needed new wheels, and had to cold set the frame, unless I was really in love with the frame.
Buying a newer used bike with 9 speed brifters would be a more cost effective choice.
https://www.bikepartsexpress.com/mm5/...FchaMgod2HsATA
I converted a Schwinn Paramount OS from 7 speed D/T shifters, to 9 speed brifters. It wasn't a big deal, and it worked fine. But I did it with a used group I already had, and it was a pretty expensive frame, in pristine condition.
I wouldn't put a lot of money in doing the conversion, where I had to buy parts new, needed new wheels, and had to cold set the frame, unless I was really in love with the frame.
Buying a newer used bike with 9 speed brifters would be a more cost effective choice.
__________________
Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike.
FYI: https://www.bikeforums.net/forum-sugg...ad-please.html
Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike.
FYI: https://www.bikeforums.net/forum-sugg...ad-please.html
Thread
Thread Starter
Forum
Replies
Last Post
Theycallmegio
Bicycle Mechanics
10
01-10-16 11:35 PM
