Thursday, October 16, 2008


Whilst riding to work on Tuesday I ran into some problems with my track bike. I was riding nice and easy, taking my time and enjoying the morning. Made a left turn onto this side-road and the rear of the bike felt really squirly. Look down and see a flat rear tyre. Not good!

Seeing as my track bike has tubular tyres (aka: sew-ups) I couldn't just put a new tube in and be on my way. I also didn't have a spare tire with me. Time for a nice walk home. 30mins later I'm home. Immediately pulled the tyre off rim to figure out where the hole was. Sounded like the valve core so I started pulling up the base tape to reveal a section about 4inches from the valve core to be the culprit. The outer casing and tread looked great so I was perplexed as to how I could have gotten a flat.

Did some research the past few days and figured out how to repair a tubular. Out comes the x-acto blade to cut some of the stitching back. Made myself about a 1inch hole to pull the tube out of. Found my problem. Looks like an impact flat from the spoke hole in the rim.

What? How is that possible? Well, I checked the air pressure in my front tyre and it was at 80psi. Assuming the rear was the same, then that's too low for riding around town with a messenger bag full of garb.

All patched up!

I took some regular thread for my clothes since that is all I had and stitched up the hole. My stitches were half that of the rest of the tyre since the thread I had wasn't as thick and durable.

I carried the existing thread through so it was held together. It was scary stitching this up. I was paranoid I'd catch the tube inside the tyre casing.

Base tape glued back on. She's a good to go!

All fixed! Now I can ride to work tomorrow.


Blogger CB2 said...

I commute on tubulars too.
I fill them with 25 ml of Stan's sealant. This has worked great for me.
Currently I'm running Tufo's which are a tubeless design, but it has worked with a conventional tubed tubular too ( fun with alliteration). One time with a conventional tubular I picked up a piece of glass in Simsbury, and lost about half my air before the Stan's did it's thing. Picked out the glass, pumped it up, good to go.

10/18/2008 8:29 PM  
Anonymous Anonymous said...

Nice pics!
Love some of the American roads. Nice shoulders etc...
Man, I hope you guys look after America.
Just come up to Canada sometime if you want some crap roads to ride on.
Lance came up about a month back he stated "I have riden on lots of roads and even in third world countries, but I have never seen anything as bad as this"

It's the truth. The roads up here just suck big time.
I admire the roads you folks have down there. Nice shoulders for cyclists.

10/24/2008 10:20 AM  

Post a Comment

<< Home