Convert SIS 7-speed to 105?
03-08-15, 01:39 PM
#1
Junior Member
Thread Starter
Join Date: Mar 2015
Posts: 10
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Convert SIS 7-speed to 105?
Hey All,
New to the forums here. A couple years ago (while on a budget) I bought a bikes direct bike. It's a Mericer Galaxy which has some cheaper components (I know, I know) and I have made a few upgrades such as seat and tires. My one friend recently cracked a frame on a road bike with shimano 105 components and I was wondering if (and how easy) I could swap out the 7 speed with his 105 cassette, crank, and brake parts. If not, I also do have his old wheels with the 105 rear cassette still attached. Is it possible to throw my 7 speed cassette on without worry? Or should I just purchase a new frame and fork and add his old components? He is giving me a very good deal on old parts and it would be a great deal if I can swap.
New to the forums here. A couple years ago (while on a budget) I bought a bikes direct bike. It's a Mericer Galaxy which has some cheaper components (I know, I know) and I have made a few upgrades such as seat and tires. My one friend recently cracked a frame on a road bike with shimano 105 components and I was wondering if (and how easy) I could swap out the 7 speed with his 105 cassette, crank, and brake parts. If not, I also do have his old wheels with the 105 rear cassette still attached. Is it possible to throw my 7 speed cassette on without worry? Or should I just purchase a new frame and fork and add his old components? He is giving me a very good deal on old parts and it would be a great deal if I can swap.
03-08-15, 02:19 PM
#2
Banned
7 speed is antique ,, now its all 8 speed .. Lose the Indexing for shifting and all is compatible ..
FYI its Chinese .. Mercier is the name of a dead French brand .. they co-opt a lot of old brand names at BD.
FYI its Chinese .. Mercier is the name of a dead French brand .. they co-opt a lot of old brand names at BD.
Last edited by fietsbob; 03-09-15 at 09:44 AM.
03-08-15, 02:23 PM
#3
cowboy, steel horse, etc
Join Date: Sep 2008
Location: The hot spot.
Posts: 45,107
Bikes: everywhere
Mentioned: 74 Post(s)
Tagged: 1 Thread(s)
Quoted: 12937 Post(s)
Liked 7,851 Times
in
4,171 Posts
Hey All,
New to the forums here. A couple years ago (while on a budget) I bought a bikes direct bike. It's a Mericer Galaxy which has some cheaper components (I know, I know) and I have made a few upgrades such as seat and tires. My one friend recently cracked a frame on a road bike with shimano 105 components and I was wondering if (and how easy) I could swap out the 7 speed with his 105 cassette, crank, and brake parts. If not, I also do have his old wheels with the 105 rear cassette still attached. Is it possible to throw my 7 speed cassette on without worry? Or should I just purchase a new frame and fork and add his old components? He is giving me a very good deal on old parts and it would be a great deal if I can swap.
New to the forums here. A couple years ago (while on a budget) I bought a bikes direct bike. It's a Mericer Galaxy which has some cheaper components (I know, I know) and I have made a few upgrades such as seat and tires. My one friend recently cracked a frame on a road bike with shimano 105 components and I was wondering if (and how easy) I could swap out the 7 speed with his 105 cassette, crank, and brake parts. If not, I also do have his old wheels with the 105 rear cassette still attached. Is it possible to throw my 7 speed cassette on without worry? Or should I just purchase a new frame and fork and add his old components? He is giving me a very good deal on old parts and it would be a great deal if I can swap.
Can you get the shifters off of him too? I'd do that.
If not, the 7-speed cassette should go on, would probably need a spacer (there might be one on the Galaxy already).
03-08-15, 03:02 PM
#4
Really Old Senior Member
Are both rears spaced the same.
03-08-15, 03:09 PM
#5
Senior Member
Join Date: Feb 2012
Location: Rochester, NY
Posts: 18,151
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
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4234 Post(s)
Liked 3,954 Times
in
2,353 Posts
Cassette, cranks/BB, ders (both), shifters and chain should all be swapped out at the same time. Brakes are less a concern as to compatibility (assuming the two bikes used the same reach). Andy.
03-08-15, 03:11 PM
#6
Senior Member
Join Date: Jul 2014
Location: SoCal
Posts: 1,331
Bikes: 89 Schwinn 754, 90 Trek 1100, 93 Trek 2300, 94 Trek 1400 (under construction), 94 Trek 930, 97 Trek 1400
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 29 Post(s)
Likes: 0
Liked 2 Times
in
2 Posts
How many speeds is your Mericer Galaxy?
You really haven't given enough information to compare and see if the parts from your friend's old bike will go you your bike.
Is your friend's bike have all 105 components? Does it have dual pivot brakes? Does your friend's bike have STI shifters?
Does your's have STI shifters? How many speeds is your bike?
You really haven't given enough information to compare and see if the parts from your friend's old bike will go you your bike.
Is your friend's bike have all 105 components? Does it have dual pivot brakes? Does your friend's bike have STI shifters?
Does your's have STI shifters? How many speeds is your bike?
03-08-15, 08:37 PM
#7
Junior Member
Thread Starter
Join Date: Mar 2015
Posts: 10
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
How many speeds is your Mericer Galaxy?
You really haven't given enough information to compare and see if the parts from your friend's old bike will go you your bike.
Is your friend's bike have all 105 components? Does it have dual pivot brakes? Does your friend's bike have STI shifters?
Does your's have STI shifters? How many speeds is your bike?
You really haven't given enough information to compare and see if the parts from your friend's old bike will go you your bike.
Is your friend's bike have all 105 components? Does it have dual pivot brakes? Does your friend's bike have STI shifters?
Does your's have STI shifters? How many speeds is your bike?
My bike is a shimano Index system 7 speed, friends bike has dual pivot brakes as well as 105 shifters, cogs, etc. His whole bike is 105 components which I would prefer to swap out all my equipment with as far as shifters, chain, derailuer, etc with.
03-08-15, 08:51 PM
#8
Señor Member
Join Date: Feb 2013
Posts: 5,066
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 649 Post(s)
Liked 293 Times
in
216 Posts
His cassette, chain, and shift lever need to be kept together. They will not work with your 7 speed unless he has a very old 105 equipped bike.
But his cassette also might not fit on your wheel, depending on how wide your cassette body is - I believe many modern 7 speed bikes are built on 8 -10 speed compatible wheels with a spacer behind the cassette, so his cassette might fit on your wheel.
But his cassette also might not fit on your wheel, depending on how wide your cassette body is - I believe many modern 7 speed bikes are built on 8 -10 speed compatible wheels with a spacer behind the cassette, so his cassette might fit on your wheel.
03-08-15, 08:58 PM
#9
Senior Member
Join Date: May 2011
Location: Upstate NY
Posts: 3,783
Bikes: Bianchi San Mateo and a few others
Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 634 Post(s)
Likes: 0
Liked 13 Times
in
9 Posts
If you want to upgrade your bike to 10-speed using his parts, you can probably do it, but you may be in for pretty much a complete swap:
Now if you wanted to keep your bike as a 7-speed, there may only be a few parts you can transfer.
- His crankset and bottom bracket (assuming both frames use the same BB type).
- His shifters.
- His cassette.
- His rear wheel (because a 10-speed cassette may not fit on your freehub).
- Your derailleurs may work satisfactorily, but I'd go with his to be on the safe side. They'll have the same cable pull ratio, but yours are designed for a slightly wider chain.
- Brakes from either bike would probably work.
Now if you wanted to keep your bike as a 7-speed, there may only be a few parts you can transfer.
- You can probably use his wheels. As noted above, you'd need a spacer behind your cassette for it to fit properly on a 10-speed hub.
- You wouldn't want his crankset or derailleurs since they're designed for a narrower 10-speed chain.
- You wouldn't want his shifters since they're 10-speed and wouldn't work with a 7-speed cassette.
03-09-15, 09:07 AM
#10
Junior Member
Thread Starter
Join Date: Mar 2015
Posts: 10
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
If you want to upgrade your bike to 10-speed using his parts, you can probably do it, but you may be in for pretty much a complete swap:
Now if you wanted to keep your bike as a 7-speed, there may only be a few parts you can transfer.
- His crankset and bottom bracket (assuming both frames use the same BB type).
- His shifters.
- His cassette.
- His rear wheel (because a 10-speed cassette may not fit on your freehub).
- Your derailleurs may work satisfactorily, but I'd go with his to be on the safe side. They'll have the same cable pull ratio, but yours are designed for a slightly wider chain.
- Brakes from either bike would probably work.
Now if you wanted to keep your bike as a 7-speed, there may only be a few parts you can transfer.
- You can probably use his wheels. As noted above, you'd need a spacer behind your cassette for it to fit properly on a 10-speed hub.
- You wouldn't want his crankset or derailleurs since they're designed for a narrower 10-speed chain.
- You wouldn't want his shifters since they're 10-speed and wouldn't work with a 7-speed cassette.
03-18-15, 09:10 AM
#11
Junior Member
Thread Starter
Join Date: Mar 2015
Posts: 10
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Hey All,
Thanks for the help. I ended up just swapping over the wheels with my friend's set and got a cassette installed with spacers at my local bike shop. Also checked out one of the newer Giant Defy 5 (2015 version) with Shimano Claris. They adjusted my gears and brakes as well as the wheels themselves after the new cassette and the bike rides like a dream. I may end up selling on Craigslist as it does have some upgraded parts and buying the giant for $650 from the LBS.
Thanks for the help. I ended up just swapping over the wheels with my friend's set and got a cassette installed with spacers at my local bike shop. Also checked out one of the newer Giant Defy 5 (2015 version) with Shimano Claris. They adjusted my gears and brakes as well as the wheels themselves after the new cassette and the bike rides like a dream. I may end up selling on Craigslist as it does have some upgraded parts and buying the giant for $650 from the LBS.
