Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 05-21-09, 02:43 PM   #1
Plainsman
Senior Member
Thread Starter
 
Plainsman's Avatar
 
Join Date: Jan 2005
Bikes:
Posts: 1,061
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Do 9 speed cranksets work with 10 speed drivetrains?

I recently got a compact crank for my wifeís road bike, a Shimano FC-4550 (Tiagra level) 50/34. This is specifically labeled a nine-speed crankset. Now we are looking at getting her a 10 speed triathlon bike, but the crankset on it is a 53/39. I would love to put the original triple back on the old road bike and move the new compact to the Tri bike and just sell the 53/39, but will a 9 speed Tiagra compact work with the new 10 speed drivetrain or am going to need to pick up another crankset? I didnít know if there was something to be concerned about with the chainring spacing or chain widths. I know 10 speed chains are narrower than their 9 speed counterparts. Since this will be a racing bike, itís important that it run smoothly.
Plainsman is offline   Reply With Quote
Old 05-21-09, 03:55 PM   #2
capwater
Senior Member
 
capwater's Avatar
 
Join Date: Dec 2004
Location: Quahog, RI
Bikes: Giant TCR Comps, Cdale R5000, Klein Q-Pro, Litespeed Siena, Piasano 105, Redline Conquest Pro, Voodoo Bizango, Fuji Aloha
Posts: 1,509
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
yup, 9 vs. 10 speed cranks is mostly marketing. people tend to associate 10 speed cranks with outboard bottom bracket bearings because that is when they debuted. swapping between the two works fine.
capwater is offline   Reply With Quote
Old 05-21-09, 04:15 PM   #3
Al1943
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Bikes: Trek 5500, Colnago C-50
Posts: 9,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Should work. Some folks have had problems trying to run a 10-speed chain on a 9-speed triple. But even that often works fine.
Al1943 is offline   Reply With Quote
Old 05-21-09, 05:41 PM   #4
AEO
Senior Member
 
AEO's Avatar
 
Join Date: Jun 2007
Location: A Coffin Called Earth. or Toronto, ON
Bikes: Bianchi, Miyata, Dahon, Rossin
Posts: 12,258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
the inner ring is the same thing for tiagra, 105, R600 which are 9/10S. the only thing that seems to set them apart is the outer ring.
__________________
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
http://sanfrancisco.ibtimes.com/arti...ger-photos.htm
AEO is offline   Reply With Quote
Old 05-21-09, 07:06 PM   #5
Plainsman
Senior Member
Thread Starter
 
Plainsman's Avatar
 
Join Date: Jan 2005
Bikes:
Posts: 1,061
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks. Just so I can learn, what is the difference in the outer ring, and is it a difference that is worth replacing just that ring? Are the rings the same distance apart on the 4550 versus say, an R700 or Ultegra SL? This Tiagra compact is still light compared to the triple, so we don't sweat the weight, just want smooth shifting in race conditions. Seems like a cool little crankset, so we are hoping to keep it around for awhile, and it was a deal at under $80 from PBK.
Plainsman is offline   Reply With Quote
Old 05-21-09, 07:18 PM   #6
Al1943
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Bikes: Trek 5500, Colnago C-50
Posts: 9,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You might want to take a look at the spreadsheet on DMF's thread: Shimano chainrings different thicknesses - please mike your rings
Al1943 is offline   Reply With Quote
Old 05-21-09, 08:41 PM   #7
Plainsman
Senior Member
Thread Starter
 
Plainsman's Avatar
 
Join Date: Jan 2005
Bikes:
Posts: 1,061
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Interesting, didn't see the 4550 or any Tiagra level 110 patterns, but it certainly illustrates that it isn't as straight forward as one might think. I guess I could just try it out. As long as I can't do any damage, the feel is what really matters no matter what the technical differences are.
Plainsman is offline   Reply With Quote
Old 05-21-09, 08:47 PM   #8
AEO
Senior Member
 
AEO's Avatar
 
Join Date: Jun 2007
Location: A Coffin Called Earth. or Toronto, ON
Bikes: Bianchi, Miyata, Dahon, Rossin
Posts: 12,258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I've used the tiagra 4550 on a 10sp bike. didn't seem any different compared to the R600 or 10sp 105 cranksets.

the shifting is real smooth even at the tiagra level.
__________________
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
http://sanfrancisco.ibtimes.com/arti...ger-photos.htm
AEO is offline   Reply With Quote
Old 05-21-09, 09:07 PM   #9
zacster
Senior Member
 
Join Date: Jul 2004
Location: Brooklyn NY
Bikes:
Posts: 4,978
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Unless someone can say that the rings are actually thicker in the 9sp there is no reason at all that it won't work. I used a 6sp crank with a 10sp chain and there no problems.
zacster is offline   Reply With Quote
Old 05-21-09, 09:16 PM   #10
PlatyPius
Arsehole
 
PlatyPius's Avatar
 
Join Date: Jul 2008
Bikes:
Posts: 2,280
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by zacster View Post
Unless someone can say that the rings are actually thicker in the 9sp there is no reason at all that it won't work. I used a 6sp crank with a 10sp chain and there no problems.
Ditto. I used a Sakae half-step triple crank with Ultegra 10 speed drivetrain with no problems at all.
PlatyPius is offline   Reply With Quote
Old 05-21-09, 09:55 PM   #11
Plainsman
Senior Member
Thread Starter
 
Plainsman's Avatar
 
Join Date: Jan 2005
Bikes:
Posts: 1,061
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks all, I'm very encouraged!
Plainsman is offline   Reply With Quote
Old 05-21-09, 11:19 PM   #12
DiabloScott
It's MY mountain
 
DiabloScott's Avatar
 
Join Date: Sep 2006
Location: Mt.Diablo
Bikes:
Posts: 6,856
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 172 Post(s)
I have a 9v crank and upgraded the shifters and chain/cassette to 10v w/ no problem at all. I had a different problem that I had to take to the LBS and they said "you know Shimano says that won't work" and I said "they don't know what they're talking about". I've never had a problem with the crank and chain. Now I DID have a problem with a 9v chain on an 8v crank but that's a different story.
DiabloScott is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 02:27 AM.