Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About Impressum
It is currently Mon Dec 05, 2016 3:39 am
Recently the board software has been updated and there are some known bugs/failures:
- Avatars are currently not being displayed ✔ FIXED
- Tapatalk connection is currently broken ✔ FIXED
- Avatars cannot be uploaded ✔ FIXED

Please note that we will soon do some changes in WW board template design in case to get a fully mobile/desktop responsiveness board!
If you find more errors please post it here: http://weightweenies.starbike.com/forum/viewtopic.php?f=7&t=139062


All times are UTC+01:00





Post new topic  Reply to topic  [ 12 posts ] 
Author Message
PostPosted: Wed Jan 23, 2013 12:54 pm 
Offline

Joined: Thu Dec 06, 2012 6:38 pm
Posts: 5
Here's the unique bit - I only want to use the first 7 cogs, 11-19t. 11-12-13-14-15-17-19. So I'll be ditching the carrier with the 3 biggest cogs on.

Is there any significant difference in weight on those 7 smaller cogs? Or are they pretty much identical?

If anyone here has a cassette handy (i.e. not on a bike) that they can quickly weigh the bottom 7 cogs & spacers for me, that'd be great :)

Thanks!


Top
   
PostPosted: Wed Jan 23, 2013 2:45 pm 
Offline

Joined: Thu Dec 06, 2012 6:38 pm
Posts: 5
No-one?


Top
   
Posted: Wed Jan 23, 2013 2:45 pm 


Top
   
 
PostPosted: Wed Jan 23, 2013 4:44 pm 
Offline

Joined: Fri Apr 06, 2012 5:50 pm
Posts: 16
I have both at home off the bike. I'll weight them tonight if I remember and post up the results.


Top
   
PostPosted: Wed Jan 23, 2013 4:49 pm 
Offline

Joined: Mon Mar 02, 2009 4:50 am
Posts: 709
I just threw my old 105 cassette away :? . But, if I remember correct, they weighed almost the exact same. Both had the largest three on a carrier and the rest were single cogs. The Ultegra came with an aluminum lockring, which is where any weight savings came from.


Top
   
PostPosted: Wed Jan 23, 2013 5:11 pm 
Offline

Joined: Thu Dec 06, 2012 6:38 pm
Posts: 5
OK thanks. I can obviously source a light lockring from elsewhere. Certainly in the shimano PDFs and photos the smaller cogs look very similar, but they have different codes and I wasn't sure if the Ultegra ones used some fancy lighter steel alloy, or were drilled out a bit more, or similar.

Woody - that'd be excellent if you can :)


Top
   
PostPosted: Wed Jan 23, 2013 5:19 pm 
Offline

Joined: Mon Aug 20, 2012 12:12 pm
Posts: 618
Location: Oop North
IIRC there's a 3gm difference between the two cassettes and that's actually the lockring.


Top
   
PostPosted: Thu Jan 24, 2013 4:05 am 
Offline
Shop Owner

Joined: Sat Jun 13, 2009 4:02 am
Posts: 1980
Location: NoVA/DC
Main difference is in the finish. 105 is smooth, chrome-y, with a tint. Ultegra is blasted or shot peened or something. Either for wear resistance, hardness, lubrication retention, whatever.


Top
   
PostPosted: Thu Jan 24, 2013 10:52 pm 
Offline

Joined: Thu Dec 06, 2012 6:38 pm
Posts: 5
OK thanks, 105 ordered.


Top
   
PostPosted: Fri Jan 25, 2013 2:02 am 
Offline

Joined: Mon Oct 18, 2010 2:21 am
Posts: 96
Surprised that the weight difference is only a few grams..... Who knew? :noidea:

_________________
Specialized S-Works Tarmac Sagan WC Edition
Specialized S-Works Tarmac Disc - Stealth
Specialized S-Works Venge Cavendish Edition


Top
   
PostPosted: Fri Jan 25, 2013 2:25 am 
Offline

Joined: Fri Apr 06, 2012 5:50 pm
Posts: 16
@Downhiller - good choice ordering the 105 cassette. Sorry I didn't get back to you yesterday, got busy with life.

I had a chance to take some weights between a 12-25 6700 cassette and a 11-25 5700 cassette. They are not exactly the same but I was able to take a bunch of weights and this is what I discovered. Sorry, I forgot to take scale pictures, so un-WW of me... :cry:

As others pointed out the main difference is in appearance, the 105 is shiny and the ultegra has a shot-peened look. The weights between the actual gears themselves are with-in my scales tolerance of 0.1g. I would say, despite the appearance, the 105 gears and Ultegra gears weigh exactly the same.

The biggest difference is in the lock-ring as someone previously mentioned 105=12.9g and Ultegra=5.5g. The other interesting point is that the spacers between the gears on the 105 are plastic at 2.2g each, whereas the spacers on the Ultegra (I assume are aluminum) and weigh 1.6g each. Even the 3 largest gear clusters are almost the same weight, both 21-23-25, with the 105=106g and the Ultegra=105.2g.

Looks like the 105 cassette is quite a bargain for all the bargain-weenies out there.


Top
   
PostPosted: Fri Jan 25, 2013 2:41 am 
Offline

Joined: Wed Oct 13, 2010 7:20 pm
Posts: 67
Location: Ireland
Good info Woody55,thanks foe weighing and posting up your findings. :thumbup:


Top
   
Posted: Fri Jan 25, 2013 2:41 am 


Top
   
 
PostPosted: Fri Jan 25, 2013 2:39 pm 
Offline

Joined: Thu Dec 06, 2012 6:38 pm
Posts: 5
Good info woody, thanks! Odd that the plastic spacers weigh more than the aluminium ones - I assume they're a fair bit bulkier? Not an issue anyway, we're talking fractions of grams now!


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 12 posts ] 

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Shimano 105 5600 vs 5700 cranks?

in Road

Twisty

0

193

Fri Sep 02, 2016 9:14 am

Twisty View the latest post

There are no new unread posts for this topic. Dogma F8 hydro disk brakes/ Di2 Ultegra vs Cannondale SuSix Di2/Ultegra

in Road

bikebike

2

280

Sat Oct 29, 2016 4:41 am

bikebike View the latest post

There are no new unread posts for this topic. 6700 Cassette-How many miles before you change?

[ Go to page: 1 2 3 ]

in Road

shoemakerpom2010

32

2920

Fri Sep 16, 2016 2:02 pm

fromtrektocolnago View the latest post

There are no new unread posts for this topic. Attachment(s) SRM PC8 Strange KMs difference

in Road

fbonde

13

560

Mon May 23, 2016 7:50 pm

sungod View the latest post

There are no new unread posts for this topic. Weight difference between F8 and F8 Disk....

[ Go to page: 1 2 ]

in Road

mile2424

15

987

Fri Sep 23, 2016 2:16 pm

dadoflam08 View the latest post


All times are UTC+01:00


Who is online

Users browsing this forum: Bing [Bot], Yahoo [Bot] and 18 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited