Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Tandem Cycling A bicycle built for two. Want to find out more about this wonderful world of tandems? Check out this forum to talk with other tandem enthusiasts. Captains and stokers welcome!

User Tag List

Reply
 
Thread Tools Search this Thread
Old 07-27-09, 01:14 PM   #51
merlinextraligh
pan y agua
Thread Starter
 
merlinextraligh's Avatar
 
Join Date: Aug 2005
Location: Jacksonville
Bikes: Wilier Zero 7; Merlin Extralight; Co-Motion Robusta; Schwinn Paramount; Motobecane Phantom Cross; Cervelo P2; Motebecane Ti Fly 29er; Calfee Dragonfly Tandem
Posts: 29,112
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Ok,
Gates apparently does not have nearly cautious enough lawyers. Talked to their techincal support person, and he said that the skipping was unlikely to have caused a problem to the belt.

In Gate's experience, skipping only causes damage to the belt if it rolls off in the process, which ours hasn't done.

So for now belt No 2 is not skipping even under heavy load, and is acceptably quiet, so we'll keep running it and see how it goes.
__________________
You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.
merlinextraligh is offline   Reply With Quote
Old 07-27-09, 01:17 PM   #52
merlinextraligh
pan y agua
Thread Starter
 
merlinextraligh's Avatar
 
Join Date: Aug 2005
Location: Jacksonville
Bikes: Wilier Zero 7; Merlin Extralight; Co-Motion Robusta; Schwinn Paramount; Motobecane Phantom Cross; Cervelo P2; Motebecane Ti Fly 29er; Calfee Dragonfly Tandem
Posts: 29,112
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
One other tihng I learned talking to Gates is that the system is now available with 69 tooth rings (as oppossed to the original 71 teeth). This is intended to make the belt easier to install, given the tight clearence on Co-Motions, even with the eccentric at its minimum distance.
__________________
You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.
merlinextraligh is offline   Reply With Quote
Old 07-27-09, 02:15 PM   #53
TandemGeek
hors category
 
TandemGeek's Avatar
 
Join Date: Jan 2002
Bikes:
Posts: 7,208
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by merlinextraligh View Post
One other tihng I learned talking to Gates is that the system is now available with 69 tooth rings (as oppossed to the original 71 teeth). This is intended to make the belt easier to install, given the tight clearence on Co-Motions, even with the eccentric at its minimum distance.
Being a Beta tester with the first production lot can be a PIA. I'd lobby WebCyclery or Co-Motion (who ever you bought the kit from) for some swag as consideration for your field work on the belt.

Anyway, the 69t pulleys sound like the right approach based on all of the feedback thus far.
TandemGeek is offline   Reply With Quote
Old 07-28-09, 04:42 PM   #54
Carbonfiberboy 
just another gosling
 
Carbonfiberboy's Avatar
 
Join Date: Feb 2007
Location: Everett, WA
Bikes: CoMo Speedster 2003, Trek 5200, CAAD 9, Fred 2004
Posts: 11,104
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 48 Post(s)
So my tandem racing friends with the Gates belt just finished an LD race. The captain got taken out with a stomach disorder at about 220 miles. He was picked up by the support crew, while stoker jumped one seat forward. She finished the last 60 miles of the race, solo. Time was good, and the Gates belt worked fine. Aren't tandems great?
Carbonfiberboy is offline   Reply With Quote
Old 08-11-09, 02:28 PM   #55
merlinextraligh
pan y agua
Thread Starter
 
merlinextraligh's Avatar
 
Join Date: Aug 2005
Location: Jacksonville
Bikes: Wilier Zero 7; Merlin Extralight; Co-Motion Robusta; Schwinn Paramount; Motobecane Phantom Cross; Cervelo P2; Motebecane Ti Fly 29er; Calfee Dragonfly Tandem
Posts: 29,112
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Latest update: I've got the belt tensioned about as tight as it can be. It's not skipping, and its running quiet. I'm knocking on wood as I type though.
__________________
You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.
merlinextraligh is offline   Reply With Quote
Old 04-17-14, 01:16 AM   #56
TransitBiker
contiuniously variable
 
TransitBiker's Avatar
 
Join Date: Apr 2014
Location: Newtown, PA
Bikes: 2012 Breezer Uptown Infinity NOS
Posts: 2,285
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Quote:
Originally Posted by merlinextraligh View Post
Latest update: I've got the belt tensioned about as tight as it can be. It's not skipping, and its running quiet. I'm knocking on wood as I type though.
As large toothed belts can flex backwards as well as forward, proper tension is critical. If too loose, it will skip... one tooth flexes back, sending the force to the next & so on. This results in the entire crank jumping ahead. If it's too tight, the teeth will be pulled out of normal configuration, causing noise as they engage & disengage, this will wear the teeth out over time & could lead to cog wear from everyday grit & debris getting in there.

I love the idea of belt drives, but you really do need to maintain the tension correctly.

- Andy
TransitBiker is offline   Reply With Quote
Old 04-17-14, 06:46 AM   #57
merlinextraligh
pan y agua
Thread Starter
 
merlinextraligh's Avatar
 
Join Date: Aug 2005
Location: Jacksonville
Bikes: Wilier Zero 7; Merlin Extralight; Co-Motion Robusta; Schwinn Paramount; Motobecane Phantom Cross; Cervelo P2; Motebecane Ti Fly 29er; Calfee Dragonfly Tandem
Posts: 29,112
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Just to update this, this thread relates to the original Gates System.

We're now running the center track sytem, which we've had fewer problems with, and is discussed in other threads.
__________________
You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.
merlinextraligh is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -6. The time now is 05:56 PM.