Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About
It is currently Sun Jun 26, 2016 3:58 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  [ 35 posts ]  Go to page Previous 1 2 3 Next
Author Message
PostPosted: Wed Jan 16, 2013 8:00 pm 
Offline
in the industry
User avatar

Joined: Sun Jul 29, 2012 2:59 pm
Posts: 832
Location: Ruidoso, NM
Endoism wrote:
Would it pose any dangerous problems to my full carbon Specialized fork? I can see it flexing back and forth a bit under medium braking (That's 'flexing' not rattling due to loose headset :) )


It isn't going to hurt your fork.

A slightly loose headset will not make a rattle... it will just be less stiff than normal. Make sure it is as tight as you can make it without restricting motion.

Is the issue happening only once per wheel revolution, or more often?

_________________
formerly rruff...


Top
   
PostPosted: Fri Jan 18, 2013 10:43 pm 
Offline

Joined: Sat Aug 13, 2011 2:29 am
Posts: 13
nathanong87 wrote:
u tried ur wife's wheel on ur bike

try your wheel on her bike

Yep, I did that - there was a tiny bit of pulsing/shuddering under brakes, but quite nelagible. Her carbon/alum fork is nearly 200g heavier than my full carbon fork. Perhaps that extra heft adds to it's stiffness

@MileHighMark
That would be a good cheap solution! Nice - ill give that a go before I do anything drastic. Thanks!


Top
   
PostPosted: Fri Jan 18, 2013 10:50 pm 
Offline

Joined: Sat Aug 13, 2011 2:29 am
Posts: 13
WMW wrote:
Endoism wrote:
Would it pose any dangerous problems to my full carbon Specialized fork? I can see it flexing back and forth a bit under medium braking (That's 'flexing' not rattling due to loose headset :) )


It isn't going to hurt your fork.

A slightly loose headset will not make a rattle... it will just be less stiff than normal. Make sure it is as tight as you can make it without restricting motion.

Is the issue happening only once per wheel revolution, or more often?


Cool, I rechecked and re-preloaded the headset bearings - still pulses.
I can't ascertain it's pulse frequency - it only pulses at higher speeds, so it's difficult to perceive. I'll see if I can grab an old tyre, paint a nice large bright reference mark in one spot and do some trial runs....

What were your thoughts to to the pulsing frequency?


Top
   
PostPosted: Sun Jan 20, 2013 4:48 am 
Offline
in the industry
User avatar

Joined: Sun Jul 29, 2012 2:59 pm
Posts: 832
Location: Ruidoso, NM
Endoism wrote:
I can't ascertain it's pulse frequency - it only pulses at higher speeds, so it's difficult to perceive.


If the pulsing is due to the brake track being uneven in width in one spot (usually at the joint) it will be very noticeable at low speeds. Try it on a steep downhill while going slow.

_________________
formerly rruff...


Top
   
PostPosted: Sun Jan 20, 2013 5:48 am 
Offline
User avatar

Joined: Thu Mar 17, 2005 3:25 am
Posts: 2206
Location: Southern Indiana USA
I had this same problem with a set of 7801 wheels I bought off ebay (now we know why he sold them). Both the front and read pulsed and I tried sanding the rims, etc. I finally decided that it was a variation in the hardness of the brake track. I found a new front rim on ebay that I guy bought for a project and never even laced it up. I relaced the front and it was fine. The rear pulsed less than the front and I just live with it. The wheelset has several thousand miles and the rear still pulses.

_________________
For certain parts stiffer is more important than lighter.


Top
   
PostPosted: Sun Jan 20, 2013 6:47 am 
Offline
User avatar

Joined: Sun Jun 12, 2005 10:56 am
Posts: 2673
Location: New Zealand
Double check that you don't have something sticky like Coke (dried) on the rim.....Wash it with lots of water and a few drops of detergent. BTW....Kinlin rims are Scandium enhanced, aren't they??...Cool stop SALMONS dude!!! (NOT Black!)....these pads (salmons) look after your rim. After you've tried water as your solvent, If this doesn't work, try a non-polar solvent (Benzene, thinners etc) and see if there is any difference.
Don't laugh re the coke....I had a mate who darn near killed himself with a sticky front rim......it took us ages to figure it out!! the rim looked (and felt) absolutely normal when having a look at it.

_________________
Updated: Racing again! Thought this was unlikely! Eventually, I may even have a decent race!
Edit: 2015: darn near won the best South Island series (got second in age
-group)..woo hoo Racy Theremery is back!!


Top
   
PostPosted: Sun Jan 20, 2013 3:37 pm 
Offline
User avatar

Joined: Thu Mar 17, 2005 3:25 am
Posts: 2206
Location: Southern Indiana USA
I think the 7801 rims were scandium enhanced also. I even wet sanded mine with a diamond whetstone (from my ski tuning tools) and there was no change. I wonder if scandium has issues with this?

_________________
For certain parts stiffer is more important than lighter.


Top
   
PostPosted: Sun Jan 20, 2013 10:16 pm 
Offline
in the industry
User avatar

Joined: Sun Jul 29, 2012 2:59 pm
Posts: 832
Location: Ruidoso, NM
theremery wrote:
Kinlin rims are Scandium enhanced, aren't they??


Niobium.

_________________
formerly rruff...


Top
   
PostPosted: Wed Jan 23, 2013 12:21 pm 
Offline

Joined: Sat Aug 13, 2011 2:29 am
Posts: 13
WMW wrote:
Endoism wrote:
I can't ascertain it's pulse frequency - it only pulses at higher speeds, so it's difficult to perceive.


If the pulsing is due to the brake track being uneven in width in one spot (usually at the joint) it will be very noticeable at low speeds. Try it on a steep downhill while going slow.


I think the pulsing is occurring more than once per revolution and decreases in severity when I'm going less than, say, 10kph...

The pinned joint is actually very very smooth without any sharp edges, so I'm pretty sure that's not the cause...


Top
   
PostPosted: Wed Jan 23, 2013 12:27 pm 
Offline

Joined: Sat Aug 13, 2011 2:29 am
Posts: 13
WMW wrote:
theremery wrote:
Kinlin rims are Scandium enhanced, aren't they??


Niobium.

Reckon I should still use Salmon pads?

Another update, I swapped with a mate's Ksyrium Elite front wheel, did a few Kim's and a variety of stopping pressures: nice and smoooooth... My mate also reported that there was a bit of pulsing from his Speedvagen ( with my front rim), but definitely not as severe as when he rode my bike with the shitty rim. So it sounds like that the full-carbon Specialized fork that I'm running, is also a bit flexy....


Top
   
PostPosted: Wed Jan 23, 2013 12:44 pm 
Offline

Joined: Tue Apr 12, 2011 8:08 am
Posts: 2275
Location: Pedal Square
I didn't have great joy with Koolstop Salmon, on American Classic rims though. Plain black Swiss or Shimano pads are a good baseline, if they don't work, Salmon won't do any magic, as far as I experienced. Doubt the choice of pad will affect the shuddering much, in any case.

_________________
Bikes: Raw Ti, 650b flatbar CX


Top
   
PostPosted: Wed Jan 23, 2013 1:12 pm 
Offline

Joined: Sat Aug 13, 2011 2:29 am
Posts: 13
I'd be happy if I could source AC 420 rims by themselves... I've had a set before and they weren't too bad...


Top
   
PostPosted: Wed Jan 23, 2013 1:43 pm 
Offline

Joined: Tue Apr 12, 2011 8:08 am
Posts: 2275
Location: Pedal Square
Agreed regarding the AC420s, but there are lots of interesting (wider) alternatives these days.

_________________
Bikes: Raw Ti, 650b flatbar CX


Top
   
PostPosted: Wed Jan 23, 2013 4:21 pm 
Offline
in the industry
User avatar

Joined: Sun Jul 29, 2012 2:59 pm
Posts: 832
Location: Ruidoso, NM
Salmon pads are recommended for Kinlin rims.

Have you thoroughly cleaned your rim and pads?

_________________
formerly rruff...


Top
   
PostPosted: Wed Jan 30, 2013 12:44 pm 
Offline

Joined: Sat Aug 13, 2011 2:29 am
Posts: 13
WMW wrote:
Salmon pads are recommended for Kinlin rims.

Have you thoroughly cleaned your rim and pads?


I cleaned my rims (hot water and Meguires car wash) and gave the brake pads a bit of a scuffing with some 100-grit and it alleviated the pulsing a little, but it's definitely still there. I've got a set of salmon pads coming soon - hopefully that'll help a little more...

As long as my full-carbon Specialized fork isn't going to snap on my and send my front teeth into the road, I'm relatively happy in just tolerating the pulsing since I like my White Industries hubs so much.. If worse comes to worse after a trial ride of Hotham at the end of Feb in preparation of 3 Peaks, I'll borrow a mate's Ksyrium wheel..

Really wish I had read more reviews regarding Kinlin rims BEFORE I bought them....


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 35 posts ]  Go to page Previous 1 2 3 Next

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Owners of disc brake road bike vs rim. To bike harsh or same

[ Go to page: 1 2 ]

in Road

mtnbikerva1

18

2584

Sun Jul 26, 2015 3:39 pm

martinSL View the latest post

There are no new unread posts for this topic. Supersix evo front brake cable

in Road

nickf

6

619

Mon Jul 27, 2015 2:56 am

nickf View the latest post

There are no new unread posts for this topic. Thinner Road Rim brake pads??

[ Go to page: 1 2 ]

in Road

Bely

15

1085

Thu Apr 14, 2016 9:53 pm

Bluechip View the latest post

There are no new unread posts for this topic. Selecting between an Aero Road bike vs a Time Trial bike?

in Road

THUNDERHORSE

6

715

Fri Jun 10, 2016 1:04 am

pdlpsher1 View the latest post

There are no new unread posts for this topic. Looking at a road disk brakes setup: Shifter/brake unit ?

in Road

LouisN

9

680

Sat Oct 03, 2015 4:39 pm

jooo View the latest post


All times are UTC+01:00


Who is online

Users browsing this forum: Bing [Bot], Google Adsense [Bot], HakeemT, maxxevv, MSNbot Media, shonanmike and 16 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