Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

upgrading a 27 speed road bike

Notices
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.

upgrading a 27 speed road bike

Old 02-21-12, 08:36 PM
  #1  
chewyoreo
Newbie
Thread Starter
 
Join Date: Feb 2012
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
upgrading a 27 speed road bike

I currently have a 27-speed road bike - 3 chain rings on the crank, and an 8 speed cassette. Can the cassette be replaced with an 11 speed cassette so I can climb hills easier? However, will I not be able to pedal and ride faster because the smallest cog on an 11-speed cassette is the same size as the smallest cog on an 8-speed cassette? If the modification can be done, besides getting a bigger chain and different shifters, will any other modifications have to be made, too?
chewyoreo is offline  
Old 02-21-12, 09:01 PM
  #2  
FastJake
Constant tinkerer
 
FastJake's Avatar
 
Join Date: May 2010
Location: Wisconsin
Posts: 7,952
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 184 Post(s)
Liked 87 Times in 73 Posts
1. 3x8 = 24
2. Only Campy currently makes 11S cassettes. Going this route would result in a complete drivetrain replacement.

To climb hills you don't want more gears. You want lower gears. You already have a triple which is a good start. Your options now are an 8S cassette with a larger-largest cog, or a smaller granny ring, or both. What is your setup now?
FastJake is offline  
Old 02-21-12, 09:20 PM
  #3  
fietsbob
Banned
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 43,599

Bikes: 8

Mentioned: 197 Post(s)
Tagged: 0 Thread(s)
Quoted: 7607 Post(s)
Liked 1,334 Times in 842 Posts
3x3x3? =27, too.
fietsbob is offline  
Old 02-21-12, 10:08 PM
  #4  
Delmarva
Senior Member
 
Delmarva's Avatar
 
Join Date: Jan 2012
Location: Virginia, USA
Posts: 559
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
Originally Posted by chewyoreo View Post
I currently have a 27-speed road bike - 3 chain rings on the crank, and an 8 speed cassette. Can the cassette be replaced with an 11 speed cassette so I can climb hills easier? However, will I not be able to pedal and ride faster because the smallest cog on an 11-speed cassette is the same size as the smallest cog on an 8-speed cassette? If the modification can be done, besides getting a bigger chain and different shifters, will any other modifications have to be made, too?
Don't bother with more gears...you have plenty now. Just get the widest range 8 speed cassette that your rear derailleur will handle. Your choices will likely be 30 to 34 teeth on the low end. What is the tooth count for the largest sprocket on the current cassette?

Last edited by Delmarva; 02-21-12 at 10:18 PM.
Delmarva is offline  
Old 02-22-12, 09:54 AM
  #5  
HillRider
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,353

Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!

Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 1870 Post(s)
Likes: 0
Liked 826 Times in 590 Posts
Originally Posted by fietsbob View Post
3x3x3? =27, too.
Thank you for the arithmetic lesson. That was most helpful.
HillRider is offline  
Old 02-22-12, 11:04 AM
  #6  
cycle_maven
Collector of Useless Info
 
Join Date: Aug 2009
Posts: 1,407
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
I wouldn't upgrade an 8-speed drive train unless it was completely worn out and I had bad case of "upgradeitus". Best choice is to get a larger cassette for the rear and a mountain bike rear derailleur to handle the extra gear size. If that isn't enough, you can get a smaller inner ring for the crank, but a 30-32 or 30-34 ratio is enough to climb most anything.
cycle_maven is offline  
Old 02-22-12, 11:24 AM
  #7  
fietsbob
Banned
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 43,599

Bikes: 8

Mentioned: 197 Post(s)
Tagged: 0 Thread(s)
Quoted: 7607 Post(s)
Liked 1,334 Times in 842 Posts
I had built up a 3 speed, 3 cog cluster, on the Sturmey, and a triple crank ..
early 60's built based on my Puch-JCHiggins bike. all steel ..
27 speed. 3 friction levers a reliable bike, still on the 26 - 1 3/8 tires.

Last edited by fietsbob; 02-22-12 at 12:50 PM.
fietsbob is offline  
Old 02-22-12, 11:31 AM
  #8  
jimc101
Senior Member
 
Join Date: Oct 2007
Location: West Yorkshire, United Kingdom
Posts: 5,714
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 422 Post(s)
Liked 71 Times in 61 Posts
Shimano Dura Ace will be 11 speed for 2013 (should be in the shops later this year) but with others, upgrading from 8-10/11 speed isn't that good on an idea, due to the need to replace so many parts.

You don't mention what cassette you are currently using, but you can get 11-28t 8 speed cassettes, and with the appropriate RD this should allow you to climb most hills especially as you have a triple up front.
jimc101 is offline  
Old 02-22-12, 02:59 PM
  #9  
bradtx
Senior Member
 
Join Date: Jun 2010
Location: Pearland, Texas
Posts: 7,579

Bikes: Cannondale, Trek, Raleigh, Santana

Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 307 Post(s)
Liked 3 Times in 3 Posts
chewyoreo, What brand of drivetrain do you have? Shimano? Compagnolo? SRAM? If other, what?

What is the tooth count on your largest and smallest chainring (front gears)? What is the tooth count on your largest and smallest cassette gears (rear gears)?

There are alot of bicycle gurus that can help, but more info is required.

Brad
bradtx is offline  
Old 02-22-12, 03:01 PM
  #10  
Monster Pete
Senior Member
 
Monster Pete's Avatar
 
Join Date: Apr 2010
Location: Warwick, UK
Posts: 1,049

Bikes: 2000-something 3 speed commuter, 1990-something Raleigh Scorpion

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Wider range 8-speed cassette and/or smaller granny ring=job done. No need for increased complexity.
Monster Pete is offline  
Old 02-22-12, 03:55 PM
  #11  
HillRider
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,353

Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!

Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 1870 Post(s)
Likes: 0
Liked 826 Times in 590 Posts
Originally Posted by jimc101 View Post
Shimano Dura Ace will be 11 speed for 2013 (should be in the shops later this year)....
That's been in the rumor mill for awhile and has been confirmed from several sources recently.

What isn't certain is will the 11-speed cassettes fit on current 8/9/10-speed freehub bodies or will a new wider 11-speed design be needed. I believe the current conclusions are the 11-speed body will be wider but will take 8/9/10-speed cassettes with a spacer (sort of like 7 on an 8/9/10-body) but 11-speed cassettes won't work with earlier hubs.

So, will it be compatible with Campy 11-speed spacing? Could be but not real likely considering Shimano and Campy's refusal to be compatible with each other's drivetrains in the past. Jtek seems safe for a while.
HillRider is offline  
Old 02-22-12, 04:58 PM
  #12  
aljohn
Senior Member
 
Join Date: Jul 2009
Posts: 164
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Fietsbob just reminded me of when I was a young lad about 1960. One of the (slightly) older guys had a bike with a 4 speed Sturmey Archer,3 speed freewheel and triple crank. I believe he was on the lookout for a 2 speed bottom bracket (if such a thing existed). This was in the days before 5 speed freewheels were heard of. He only built it because he had a load of spare parts to play with - and because he could. Of course we all laughed like drains, after all who wanted more than 8 gears? What did we know? I can't remember if he cobbled bits together or found parts that fitted correctly (I doubt that), I must ask him next time I see him. Those were the days - real steel......
aljohn is offline  
Old 02-22-12, 09:36 PM
  #13  
Delmarva
Senior Member
 
Delmarva's Avatar
 
Join Date: Jan 2012
Location: Virginia, USA
Posts: 559
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
Originally Posted by aljohn View Post
Fietsbob just reminded me of when I was a young lad about 1960. One of the (slightly) older guys had a bike with a 4 speed Sturmey Archer,3 speed freewheel and triple crank. I believe he was on the lookout for a 2 speed bottom bracket (if such a thing existed). This was in the days before 5 speed freewheels were heard of. He only built it because he had a load of spare parts to play with - and because he could. Of course we all laughed like drains, after all who wanted more than 8 gears? What did we know? I can't remember if he cobbled bits together or found parts that fitted correctly (I doubt that), I must ask him next time I see him. Those were the days - real steel......
Your story reminds me of the local bike shop in SoCal where I grew up in the early 1960's. The owner combined a 4 speed hub with the then exotic 5 speed free and 2 speed chain wheels. He built it for the challenge and never sold it. I was fascinated but remained satisfied with my Dunelt 10 speed.
Delmarva is offline  
Old 02-22-12, 10:08 PM
  #14  
HillRider
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,353

Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!

Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 1870 Post(s)
Likes: 0
Liked 826 Times in 590 Posts
Combining an IGH with a freewheel/casette has been done commercially. Sachs (before their aquisition by SRAM) made a 3x7 hub that combined a 3-speed IGH with a freehub body that took a 7-speed cassette. Bike Friday fitted this hub to several of it's models along with a single chainring.
HillRider is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
fastbike
Bicycle Mechanics
21
08-24-20 04:30 AM
deaninkl
Bicycle Mechanics
10
04-08-17 10:23 PM
treadtread
General Cycling Discussion
9
04-03-14 09:57 PM
curdog
Touring
8
07-11-12 09:30 AM
supton
Bicycle Mechanics
9
06-25-12 07:05 PM

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.