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 05-02-11, 09:51 AM   #1
lazlo
Seasoned Newbie
Thread Starter
 
Join Date: Jun 2007
Location: Portland, OR
Bikes: 2008 Cross Check; Santana Sovereign
Posts: 180
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Blowout

We had our first flat yesterday in 2 years of tandem cycling, and it came in the form of a blowout. We were on a flat, even road, going around 16mph. I heard a ticking from the back wheel, and as I slowed...BLAM!!! The tube blew out the side about 3 inches from the stem, and I can see where the rubber on the outside of the tire bead is slightly damaged. I hadn't replaced the tube recently, and I'm pretty sure the tire bead was properly seated. We're running Schwalbe Marathons on Salsa Del Gado Cross rims, both of which were new last fall, and we didn't ride much over the winter. I've been inflating the rear tire to 110 psi, and the front to 100, but I realize that the Schwalbes are only rated to 95. Could that have caused the blowout? BTW, our total weight is around 360 lbs. I'm just thankful that this didn't happen on a downhill!

Lazlo
lazlo is offline   Reply With Quote
Old 05-02-11, 10:29 AM   #2
TandemGeek
hors category
 
TandemGeek's Avatar
 
Join Date: Jan 2002
Bikes:
Posts: 7,212
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Quote:
Originally Posted by lazlo View Post
I've been inflating the rear tire to 110 psi, and the front to 100, but I realize that the Schwalbes are only rated to 95. Could that have caused the blowout?
Not in my experience; more likely just some type of a bead seating issue.

But, that's a guess as I'd have to see a lot of pictures of the tube, tire, rim, etc. before even venturing a guess at the actual cause... and even then it might be hard to know. However, if you have the same rim / tires on the front of the bike you might want to deflate the tire and double check bead seat and bead to make sure you still have a tire that fits snuggly on the rim.
TandemGeek is offline   Reply With Quote
Old 05-02-11, 11:04 AM   #3
tandem rider
Senior Member
 
Join Date: Dec 2005
Location: Indianapolis, IN
Bikes: Co-Motion tandem, Serotta, and Specialized mt. bike
Posts: 348
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
We have 26 x 1.5 Schwalbe Marathon Racers on our tandem rated to 85 psi. Our LBS mechanic, who does a lot of tandem work, has continually told us not to inflate past 90 psi. Over the last 19 years we have blown 3 or 4 rear tires, sometimes it just happens.
tandem rider is offline   Reply With Quote
Old 05-02-11, 02:56 PM   #4
Charles Ramsey
Guest
 
Bikes:
Posts: n/a
Mentioned: Post(s)
Tagged: Thread(s)
Quoted: Post(s)
Every tire I have had over 1.5 inches wide has failed at the bead. Tires 1.5 inches last the longest they fail due to more than one cut hitting the same spot.
  Reply With Quote
Old 05-02-11, 03:19 PM   #5
lazlo
Seasoned Newbie
Thread Starter
 
Join Date: Jun 2007
Location: Portland, OR
Bikes: 2008 Cross Check; Santana Sovereign
Posts: 180
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
This was a 32mm tire. Thanks for the advice, I'll check my front tire, too. I'm taking the rim and tire to the wrench who built it to have it checked out. What made this even more fun was that I replaced the blown tube with what proved to be a poorly patched one, which then went flat 3 miles later. Luckily, my second spare tube was a new one. On the plus side, my wife got a roadside flat fixing lesson, and it was a nice sunny day.
lazlo is offline   Reply With Quote
Old 05-02-11, 04:33 PM   #6
zonatandem
Senior Member
 
zonatandem's Avatar
 
Join Date: Dec 2003
Location: Tucson, AZ
Bikes: Custom Zona c/f tandem + Scott Plasma single
Posts: 10,859
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 29 Post(s)
Your first flat in 2 years . . . ?
But how many miles on that tire/tube?

Our last flat was about 2,260 miles (and 6 months) ago.
We run Maxxis Re-Fuse 700x25 tires.
zonatandem is offline   Reply With Quote
Old 05-02-11, 05:45 PM   #7
lazlo
Seasoned Newbie
Thread Starter
 
Join Date: Jun 2007
Location: Portland, OR
Bikes: 2008 Cross Check; Santana Sovereign
Posts: 180
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Less than 500 miles on the tube and tire.
lazlo 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 12:50 AM.