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 08-23-11, 05:29 PM   #1
McQz
Fran & Nanette
Thread Starter
 
McQz's Avatar
 
Join Date: Jan 2009
Location: Ridin' 'round the corner in Winslow, AZ
Bikes: Gary Fisher Wingra, 30 yr old KHS Mountain Bike, Used Yakima traile
Posts: 231
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Gear change advice needed - duplicate, sorry

Shimano 105 cranks and derailleurs, 11-28 & 50-39-30
Short of replacing the derailleur, can we go bigger than 28t on the cassette?

Is there a smaller chainring than the 30t for the 105 crank? It seems like I should be able to go to something like 46-36-26 or whatever the smallest chainring available would be.

We live 60 miles from the nearest bike shop and our transport is a 15mpg pickemup truck, so it isn't very convenient to pop over without having a good idea what I want to do when we get there.

Thanks,

Last edited by McQz; 08-24-11 at 06:53 AM. Reason: Duplicate
McQz is offline   Reply With Quote
Old 08-23-11, 05:32 PM   #2
McQz
Fran & Nanette
Thread Starter
 
McQz's Avatar
 
Join Date: Jan 2009
Location: Ridin' 'round the corner in Winslow, AZ
Bikes: Gary Fisher Wingra, 30 yr old KHS Mountain Bike, Used Yakima traile
Posts: 231
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Gear change advice needed

My wife and I have Specialized Cross Bikes with Shimano 105 derailleurs & cranks, 11-28 cassette, and 50-39-30 chainrings. We use these bike as all-around bikes with rear racks / panniers, cargo trailer hitch, and Burley kid-trailer hitch (I'm the only one who pulls trailers). They are used for all of our around town riding to run errands. (For strictly fun riding my bride and I have road and mountain bikes.) We also take them on road trips as our favored mode of transport whenever we stop to sightsee etc.

In a year I have NEVER used the 50t ring. Much of the time I find myself quite comfortably in the 30t ring! It seems that I should be running different gears.

According to our mechanic the 28t sprocket is the largest that the 105 will accommodate. Examining the front derailleur and chainrings, it appears that there is a margin for change there.

Short of replacing the derailleur, can we go bigger than 28t on the cassette?

Is there a smaller chainring than the 30t for the 105 crank? It seems like I should be able to go to something like 46-36-26 or whatever the smallest chainring available would be.

We live 60 miles from the nearest bike shop and our transport is a 15mpg pickemup truck, so it isn't very convenient to pop over without having a good idea what I want to do when we get there.

Thanks,
McQz is offline   Reply With Quote
Old 08-23-11, 05:40 PM   #3
10 Wheels
Galveston County Texas
 
10 Wheels's Avatar
 
Join Date: Nov 2007
Location: In The Wind
Bikes: 2010 Expedition, 03 GTO
Posts: 29,894
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 303 Post(s)
I changed mine to 50-39-24 and a 11-34 cassette. Didn't have to do anything else.



__________________
[SIZE=1][B]What I like about Texas[/B]
http://www.youtube.com/watch?v=PGukLuXzH1E

Set F1re To The Ra1n ( NY Night Rain Ride)
http://www.youtube.com/watch?v=W7jfcWEkSrI
10 Wheels is offline   Reply With Quote
Old 08-23-11, 05:42 PM   #4
Barrettscv 
Have bike, will travel
 
Barrettscv's Avatar
 
Join Date: Feb 2006
Location: Edwardsville, Illinois
Bikes: Colnago Nuova Mexico, Eddy Merckx Corsa Extra, Pinarello Gavia, Schwinn Paramount, Motobecane Grand Record, Peugeot PX10, Serotta Nova X, Simoncini Cyclocross Special, Origin8 monstercross, Pedal Force CG2 and CX2
Posts: 10,599
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 69 Post(s)
Going down to a 28 or even a 26t granny gear is the cheapest and best way to increase the range. Just add a Third-eye chain retainer since the chain might drop more readily.

You will find that the chain goes slack in the smaller cogs while on the 26t granny gear. Just be sure the chain is adjusted correctly, not too short on the big-big combination.

http://harriscyclery.net/itemdetails.cfm?ID=1776

http://www.cambriabike.com/shopexd.a...m=021850000100


Last edited by Barrettscv; 08-23-11 at 05:54 PM.
Barrettscv is offline   Reply With Quote
Old 08-23-11, 05:47 PM   #5
10 Wheels
Galveston County Texas
 
10 Wheels's Avatar
 
Join Date: Nov 2007
Location: In The Wind
Bikes: 2010 Expedition, 03 GTO
Posts: 29,894
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 303 Post(s)
http://www.google.com/products/catal...ed=0CDAQ8gIwAw#
__________________
[SIZE=1][B]What I like about Texas[/B]
http://www.youtube.com/watch?v=PGukLuXzH1E

Set F1re To The Ra1n ( NY Night Rain Ride)
http://www.youtube.com/watch?v=W7jfcWEkSrI
10 Wheels is offline   Reply With Quote
Old 08-23-11, 05:50 PM   #6
10 Wheels
Galveston County Texas
 
10 Wheels's Avatar
 
Join Date: Nov 2007
Location: In The Wind
Bikes: 2010 Expedition, 03 GTO
Posts: 29,894
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 303 Post(s)
http://www.google.com/products/catal...ed=0CDAQ8gIwAw#
__________________
[SIZE=1][B]What I like about Texas[/B]
http://www.youtube.com/watch?v=PGukLuXzH1E

Set F1re To The Ra1n ( NY Night Rain Ride)
http://www.youtube.com/watch?v=W7jfcWEkSrI
10 Wheels is offline   Reply With Quote
Old 08-23-11, 06:26 PM   #7
Drew Eckhardt
Senior Member
 
Drew Eckhardt's Avatar
 
Join Date: Apr 2010
Location: Sunnyvale, CA USA
Bikes:
Posts: 5,136
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 63 Post(s)
Quote:
Originally Posted by McQz View Post
My wife and I have Specialized Cross Bikes with Shimano 105 derailleurs & cranks, 11-28 cassette, and 50-39-30 chainrings. We use these bike as all-around bikes with rear racks / panniers, cargo trailer hitch, and Burley kid-trailer hitch (I'm the only one who pulls trailers). They are used for all of our around town riding to run errands. (For strictly fun riding my bride and I have road and mountain bikes.) We also take them on road trips as our favored mode of transport whenever we stop to sightsee etc.

In a year I have NEVER used the 50t ring. Much of the time I find myself quite comfortably in the 30t ring! It seems that I should be running different gears.
Obviously. You have a cassette with a tiny little small cog. 39x11 nets 27.8 MPH cruising and 36.1 MPH sprinting. 39x12 is still 25.3 and 32.9 MPH respectively.

I'd run 50-39-28 x 13-14-15-16-17-18-19-21-23-26. Tight spacing, plenty of speed on the 39 ring, low bail out gear.

I used 50-40-30x13-14-15-16-17-18-19-21 in the 8 speed era and eventually moved to 50-34x13-14-15-16-17-18-19-21-23 as parts wore out. Never need anything more than 50x13 (even living in Boulder, CO between the plains and Colorado Rockies for 15 years), although having the one tooth jumps to the 19 are wonderful.


Quote:
Is there a smaller chainring than the 30t for the 105 crank? It seems like I should be able to go to something like 46-36-26 or whatever the smallest chainring available would be.
You can run a 24 on a 74mm BCD.

When doing so a chain catcher may be prudent.

Last edited by Drew Eckhardt; 08-23-11 at 09:59 PM.
Drew Eckhardt is offline   Reply With Quote
Old 08-23-11, 07:24 PM   #8
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Posts: 28,917
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 94 Post(s)
Your 30T granny can be replace with as small as a 24T chainring and I have changed them out for 26T chainring on a dozen or more bikes with very good results. I would also try toi get a cassette with a 12 or better, a 13T small cog. An 11 is a waste of time for you and a 12x27 will certainly work and a 12x30T cassette should work despite Shimano's guide lines.
HillRider is offline   Reply With Quote
Old 08-23-11, 07:41 PM   #9
McQz
Fran & Nanette
Thread Starter
 
McQz's Avatar
 
Join Date: Jan 2009
Location: Ridin' 'round the corner in Winslow, AZ
Bikes: Gary Fisher Wingra, 30 yr old KHS Mountain Bike, Used Yakima traile
Posts: 231
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I appreciate the input. I really like the idea of a 24t CR. I also agree that the 11t sprocket is wasted on us, but the 10 speed cassette is already there and unless I change out the whole cassette for something like a 12 or 13-30, I'll probably stick with it. Back to the CRs, I REALLY have no use for the 50. I am perfectly happy coasting when gravity draws me down a hill over 30mph - I'm never going to pedal that fast.

With the stock cassette and the 24t small CR, what would you recommend as replacements for the 39 and 50?
McQz is offline   Reply With Quote
Old 08-23-11, 09:03 PM   #10
CbadRider
Administrator
 
CbadRider's Avatar
 
Join Date: Sep 2008
Location: On the bridge with Picard
Bikes: Specialized Allez, Specialized Sirrus
Posts: 5,962
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
The duplicate threads were merged.
__________________
Quote:
Originally Posted by Xerum 525 View Post
Now get on your cheap bike and give me a double century. You walking can of Crisco!!

Forum Guidelines *click here*
CbadRider is offline   Reply With Quote
Old 08-24-11, 06:30 AM   #11
McQz
Fran & Nanette
Thread Starter
 
McQz's Avatar
 
Join Date: Jan 2009
Location: Ridin' 'round the corner in Winslow, AZ
Bikes: Gary Fisher Wingra, 30 yr old KHS Mountain Bike, Used Yakima traile
Posts: 231
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks, I tried editing the 2nd one away and had no success.
Fran
McQz is offline   Reply With Quote
Old 08-24-11, 07:46 AM   #12
Barrettscv 
Have bike, will travel
 
Barrettscv's Avatar
 
Join Date: Feb 2006
Location: Edwardsville, Illinois
Bikes: Colnago Nuova Mexico, Eddy Merckx Corsa Extra, Pinarello Gavia, Schwinn Paramount, Motobecane Grand Record, Peugeot PX10, Serotta Nova X, Simoncini Cyclocross Special, Origin8 monstercross, Pedal Force CG2 and CX2
Posts: 10,599
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 69 Post(s)
Quote:
Originally Posted by McQz View Post
I appreciate the input. I really like the idea of a 24t CR. I also agree that the 11t sprocket is wasted on us, but the 10 speed cassette is already there and unless I change out the whole cassette for something like a 12 or 13-30, I'll probably stick with it. Back to the CRs, I REALLY have no use for the 50. I am perfectly happy coasting when gravity draws me down a hill over 30mph - I'm never going to pedal that fast.

With the stock cassette and the 24t small CR, what would you recommend as replacements for the 39 and 50?
You could install TA Alize 130 bcd chainrings. A 46t and a 38t are available, but not cheap.

You could also install a trekking triple like this: http://www.universalcycles.com/shopp...5&category=380

The chainline becomes poor when using a trekking or MTB chainset, however.

Michael
Barrettscv is offline   Reply With Quote
Old 08-24-11, 08:00 AM   #13
motobecane69
Banned.
 
Join Date: Mar 2011
Bikes:
Posts: 1,100
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
first of all, your mechanic is probably wrong on 28 being the largest you can run in the rear. you definately have a long cage deraileur because you are running a triple and many of us are running 32 tooth rear casettes. Whenever this topic comes up there are those who say "it depends on the length of your deraileur hanger" which may be true yet multiple people post pics of their 105 and ultegra setups with 32 tooth cogs and nobody ever chimes in and says "I tried it and it didn't work" I also agree, if you can get a casette with a 12 or 13 tooth cog it would be worth while.

Since you mention that most of the time you don't even use your middle ring let alone your big ring, you may want to consider just getting a whole new crank. sounds like a MTB crank might be perfect, especially if you are loading up panniers. The 48/36/26 crank option from the post above sounds pretty ideal. A new casette with a 32 tooth cog is going to be $40-80$ depending on the level of casette and that only gets you a small improvement. Add to that the price of a single chain ring and your getting up over $100. Might as well buy the new crank listed above that includes the bottom bracket and pay $20 for your lbs to install it. Same cost as changingn casette and one chainring but this will get you a lot more flexibility.
motobecane69 is offline   Reply With Quote
Old 08-24-11, 09:32 AM   #14
well biked 
biked well
 
well biked's Avatar
 
Join Date: Jul 2005
Bikes:
Posts: 7,088
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 17 Post(s)
Quote:
Originally Posted by motobecane69 View Post
Whenever this topic comes up there are those who say "it depends on the length of your deraileur hanger" which may be true yet multiple people post pics of their 105 and ultegra setups with 32 tooth cogs and nobody ever chimes in and says "I tried it and it didn't work"
I tried it and it didn't work.
well biked is offline   Reply With Quote
Old 09-18-11, 07:08 AM   #15
McQz
Fran & Nanette
Thread Starter
 
McQz's Avatar
 
Join Date: Jan 2009
Location: Ridin' 'round the corner in Winslow, AZ
Bikes: Gary Fisher Wingra, 30 yr old KHS Mountain Bike, Used Yakima traile
Posts: 231
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
What issue(s) kept it from working?
McQz 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 02:02 AM.