Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About
It is currently Mon Jul 25, 2016 7:10 pm
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  [ 9 posts ] 
Author Message
 Post subject: Super Record and BB7?
PostPosted: Fri Dec 02, 2011 1:46 am 
Offline

Joined: Thu Mar 25, 2004 8:34 pm
Posts: 607
Do Campy levers have the right Pull ratio for BB7's?

What tuning can you do to drop weight on them?

Will these rotors work?

http://www.bikerumor.com/2011/12/01/fir ... ke-rotors/

It looks like Tune Prince/Princess Hubs are nice and light at about 270 grams combined only about 30 grams more than Mig/Mag, so assuming an extra 300 grams for brakes, 30 for hubs, 50 or 60 for tougher spokes and maybe 200 on the frame fork, 600 Grams or so extra to run Discs?


Top
   
PostPosted: Fri Dec 02, 2011 4:08 am 
Offline

Joined: Mon Mar 02, 2009 4:50 am
Posts: 709
If your using postmount brakes, you can use alu. bolts to hold the caliper to the frame/fork. You can also use 3ti/3alu. rotor bolts. Swap any other bolts to Ti. You could also use alloy backed pads, but those are usually organic, which won't last long in mud.

If you have quite a bit of patience, you could sand the calipers down, like this guy:
http://forums.mtbr.com/weight-weenies/t ... 52294.html

Ashima rotors should work fine. If you want the absolute lightest, have a look at Scrub components.

If you wanted superlight, you could go with Extralite hubs to save even more weight over the Prince/Princess, but I don't really know how durable they are. You also don't need thicker spokes. I know plenty of people who use DT Revo's/Sapim Laser on their MTB's, all of them are 170lbs+. I've even heard of downhill racers using light weight spokes (CX-Ray's, Revo's, Lasers, etc.) They may need to be longer, depending on how you had your previous wheels laced, but that will add very minimal weight. IME 2x non-drive side front, radial driveside front, and 2x all the way on the rear will be fine.


Top
   
PostPosted: Fri Dec 02, 2011 7:43 am 
Offline

Joined: Thu Jan 11, 2007 3:48 pm
Posts: 276
Location: The Netherlands
So you're going to spend a lot of money to get your bike 600gr heavier.
I wouldn't do that eve if all the stuff comes for free

The disk hubs are for mtb and they usually are 135mm. I'm not sure if your frame is 135mm or there are other light options for 130mm, if this is not the case you should go for something else (and probably heavier)

In your estimation you should consider the extra weight that comes with longer cables and housing to reach the disk brake.
The cable housing is going to be 1mt longer


Top
   
PostPosted: Fri Dec 02, 2011 1:51 pm 
Offline

Joined: Thu Nov 22, 2007 5:58 pm
Posts: 48
Location: London
morrisond wrote:
Do Campy levers have the right Pull ratio for BB7's?


In my experience, running Centuar with the road specific BB7s, they don't have enough pull to get the brakes set up properly. Braking performance was so bad I gave up on cable activated discs and have gone back to cantilevers, and this was despite me investing a lot of time and effort in optimising the setup.


Top
   
PostPosted: Fri Dec 02, 2011 3:06 pm 
Offline

Joined: Thu Mar 25, 2004 8:34 pm
Posts: 607
So Campy Levers have a lower pull ratio than SRAM or Shimano?

I had BB7's on a Cdale Cyclocross Disc 5-6 years ago with Dura Ace 9 sp levers- it was amazing.

Frame will be custom to accomodate.


Top
   
PostPosted: Sat Dec 03, 2011 12:36 am 
Offline

Joined: Mon Mar 02, 2009 4:50 am
Posts: 709
vcnz wrote:
So you're going to spend a lot of money to get your bike 600gr heavier.
I wouldn't do that eve if all the stuff comes for free


I know this is weight weenies, but sometimes (rarely though! :D ) the added performance is worth the extra weight! Other than the rotor, it's static weight which doesn't really matter a whole lot in cross (in my opinion).


Top
   
PostPosted: Sat Dec 03, 2011 5:42 pm 
Offline
User avatar

Joined: Mon Jan 26, 2004 7:48 pm
Posts: 127
Campagnolo and SRAM both have the same cable-pull - I've had absolutely no problems running BB7s with Campagnolo Ergos in the past

_________________
Just ride


Top
   
PostPosted: Sun Dec 04, 2011 2:00 pm 
Offline
User avatar

Joined: Sat Nov 30, 2002 4:49 am
Posts: 1903
There are road pull ratio BB7s and V - pull ratio ones. My suspicion is andyp was trying to run the V ones with a road lever

_________________
Success is how far you you bounce back up after being knocked down


Top
   
PostPosted: Sun Dec 04, 2011 2:23 pm 
Offline

Joined: Thu Nov 22, 2007 5:58 pm
Posts: 48
Location: London
Your suspicion is wrong.


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 9 posts ] 

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. 2014 Campagnolo Super Record/Record full groupset

in For sale - Pictures are mandatory 22-3-13

emorydptt

0

444

Sat May 07, 2016 2:05 pm

emorydptt View the latest post

There are no new unread posts for this topic. 2014 Super Record or 2015 Record?

[ Go to page: 1 2 ]

in Road

fudgefudgefudge

19

1446

Thu Mar 31, 2016 4:39 pm

Junior7 View the latest post

There are no new unread posts for this topic. Campagnolo Super Record RS

in Wanted

Simon BP

0

57

Wed Jun 29, 2016 5:23 pm

Simon BP View the latest post

There are no new unread posts for this topic. 2011 Super Record

in Road

oddspam

6

504

Thu Mar 31, 2016 5:58 pm

AJS914 View the latest post


All times are UTC+01:00


Who is online

Users browsing this forum: No registered users and 1 guest


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