Go Back  Bike Forums > Bike Forums > Road Cycling
Reload this Page >

Shimano groupset upgrade question

Notices
Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

Shimano groupset upgrade question

Old 03-11-21, 07:54 PM
  #1  
davidrichman
Junior Member
Thread Starter
 
Join Date: Feb 2021
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Shimano groupset upgrade question

I am riding a Specialized Sirrus Comp Carbon which comes with a Shimano Tiagra groupset and Axis 1.0 wheels. I'm not happy with the Tiagras and want to upgrade to a 105 group set. I'm getting conflicting information regarding the need to upgrade the wheel in order to accommodate the 11 speed cassette that comes with the 105s (the Tiagra is a 10 speed). Can someone clarify whether the wheel needs to be upgraded or whether the Axis 1.0 can take an 11 speed cassette. Thanks.
davidrichman is offline  
Old 03-11-21, 07:59 PM
  #2  
HTupolev
Senior Member
 
Join Date: Apr 2015
Location: Seattle
Posts: 3,848
Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 1757 Post(s)
Liked 905 Times in 443 Posts
Originally Posted by davidrichman View Post
I'm not happy with the Tiagras and want to upgrade to a 105 group set.
What about the Tiagra setup are you unhappy with?

I'm getting conflicting information regarding the need to upgrade the wheel in order to accommodate the 11 speed cassette that comes with the 105s (the Tiagra is a 10 speed). Can someone clarify whether the wheel needs to be upgraded or whether the Axis 1.0 can take an 11 speed cassette. Thanks.
Depends on the cassette. Shimano's 11-speed cassettes are wider than their 10-speed freehubs, but for sizes 11-34 and larger, the big cog "overhangs the spokes" instead of sitting on the freehub body, so you can mount it on a 10-speed wheel. If you use a cassette where the big cog is smaller than 34 teeth, you'll need a wheel with an 11-speed freehub.
HTupolev is online now  
Old 03-11-21, 08:57 PM
  #3  
davidrichman
Junior Member
Thread Starter
 
Join Date: Feb 2021
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Thanks. Very helpful. Much appreciated
davidrichman is offline  
Old 03-11-21, 11:01 PM
  #4  
surak
Senior Member
 
surak's Avatar
 
Join Date: Nov 2017
Location: Seattle
Posts: 1,538

Bikes: Specialized Roubaix, Canyon Inflite AL SLX, Priority Continuum Onyx, Santana Vision, Kent Dual-Drive Tandem

Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 663 Post(s)
Liked 482 Times in 279 Posts
You'd probably be better off upgrading the wheels before the groupset if you want a noticeable difference in ride quality. The only thing about Tiagra 4700 that I notice at all when riding are that the levers are slightly less ergonomic than those from higher tiers. Having an extra cog or saving a little weight from the drivetrain is less significant compared to getting lighter and/or more aero wheels (or heck, even better tires if you're running stock). Especially since stock wheels on bikes that aren't top-of-the line tend to be overbuilt boat anchors.
surak is offline  
Likes For surak:
Old 03-12-21, 12:21 PM
  #5  
Leinster
Senior Member
 
Join Date: Jun 2013
Location: location location
Posts: 2,786

Bikes: MBK Super Mirage 1991, CAAD10, Yuba Mundo Lux, and a Cannondale Criterium Single Speed

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 245 Post(s)
Liked 181 Times in 131 Posts
Originally Posted by surak View Post
You'd probably be better off upgrading the wheels before the groupset if you want a noticeable difference in ride quality. The only thing about Tiagra 4700 that I notice at all when riding are that the levers are slightly less ergonomic than those from higher tiers. Having an extra cog or saving a little weight from the drivetrain is less significant compared to getting lighter and/or more aero wheels (or heck, even better tires if you're running stock). Especially since stock wheels on bikes that aren't top-of-the line tend to be overbuilt boat anchors.
All of this. I had 9 speed Tiagra on an old bike, my wife has 10s Tiagra on hers, and any differences I've noticed between their performance, and that of my 105 and Athena groups on my newer bikes, wouldn't be significant enough to justify the extra spend.

Upgraded wheels, on the other hand, do make a big difference, and tire upgrades make an even bigger difference in terms of bang for the buck.
Leinster is offline  
Old 03-12-21, 02:00 PM
  #6  
Doomrider74
Senior Member
 
Join Date: Mar 2021
Posts: 252
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 130 Post(s)
Liked 94 Times in 52 Posts
There is a weight penalty with Tiagra, though: The crankset on its own is nearly 200g heavier than 105, so over a whole drivetrain the weight saving could be significant. I do agree wheels are the best place to start saving weight, but you can't go wrong with 105, which is the best value drivetrain out there, IMO.
Doomrider74 is offline  
Old 03-13-21, 02:29 PM
  #7  
Iride01
Hits [ENTER] b4 thinking
 
Iride01's Avatar
 
Join Date: Jul 2017
Location: Mississippi
Posts: 7,664

Bikes: '20 Tarmac Disc Comp '91 Schwinn Paramount '78 Raleigh Competition GS

Mentioned: 33 Post(s)
Tagged: 0 Thread(s)
Quoted: 3004 Post(s)
Liked 1,599 Times in 1,165 Posts
Most bikes with Tiagra 4700 10 speed will work with most 11 speed cassettes. But you do need to check on what freehub is on that wheel to be certain. A older version of Tiagra is definitely a maybe.

So what is the issue with the Tiagra that bothers you? I wouldn't upgrade 10 speed Tiagra to 11 speed 105. Tiagra shifts good enough. At least Tiagra 4700 and above does.

I did put 105 5800 on my son's Tiagra 4700 equipped Trek Emonda. I had the 105 components sitting on the shelf for a bike I dicided not to build out with it. He says about all it did for him was give him another gear between the min and max cog. Shifting is about the same which is very decent IMO.
Iride01 is online now  
Old 03-13-21, 05:21 PM
  #8  
Kimmo 
bike whisperer
 
Kimmo's Avatar
 
Join Date: Dec 2009
Location: Melbourne, Oz
Posts: 9,343

Bikes: https://weightweenies.starbike.com/forum/viewtopic.php?f=10&t=152015&p=1404231

Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 1279 Post(s)
Liked 501 Times in 361 Posts
See if you can spot a spacer behind the cassette. If so, it's an 11s freehub.

But as others have said, Tiagra works pretty nice, and aside from the boat anchor crankset you're talking some pretty incremental gains across the whole groupset if you want to upgrade.

The smartest way to do it, if you want to enjoy a nicer groupset, is buy a bike with a nicer groupset. Way cheaper than upgrading piece by piece...

Last year I found a bike (minus wheels) for a mate, with 10s Ultegra Di2 for au$900. I just went looking at Dura-Ace and Ultegra Di2 gear (first gen 11s stuff) and the DA derailers alone run to au$1100...
Kimmo is offline  
Old 03-14-21, 06:32 PM
  #9  
Doomrider74
Senior Member
 
Join Date: Mar 2021
Posts: 252
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 130 Post(s)
Liked 94 Times in 52 Posts
I have Tiagra on my gravel bike and 105 on my roadie and I would say there is a definite improvement in shifting with the 105. The Tiagra is good, but the 105 is better, IMO.

Would I go further up the food chain than 105? Probably not as a whole groupset, unless I wanted to go to Di2: I had an Ultegra chainset on my old road bike, which I had to sell when I moved to Canada, but that was only because I found a good deal on it which made it only marginally more expensive than a new set of chainrings for the 105 chainset I already had, and it came with a new BB.
Doomrider74 is offline  

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.