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

Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Thread Tools Search this Thread
Old 08-01-10, 05:49 PM   #1
Thread Starter
BRAAP307's Avatar
Join Date: Aug 2010
Location: Clearfield, Utah
Bikes: Specialized rockhopper 29er
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
New mountain biker

Hello all, I joined this forum to learn some of the tricks of the trade with mountain biking, just picked up a new specialized rockhopper 29er and have loved every minute of it! I'm originally from central florida but the Air Force has taken me all over the world. I'm currently in San Antonio for aircrew school and then on to many more schools after that so the bike will be my enjoyment along the way I currently live when not traveling in Clearfield Utah with my wife and 2 dogs and we will be finding out where the AF will send us next in about 3 weeks!

Main reason I joined TODAY was due to my bike having gone through 4 tubes in 7 days of grass/street and dirt road riding... I'm dumbfounded and have no Idea what I'm doing wrong... the bike shop gave me 4 kenda 29' tubes and they just fall havn't been able to take more than a few hours ride time before they are flat. the stock tubes lasted until I got to TX and now I have blown both of those... Help me!
BRAAP307 is offline   Reply With Quote
Old 08-01-10, 06:47 PM   #2
Senior Member
MudPie's Avatar
Join Date: May 2004
Location: Southern California
Posts: 1,874
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Some diagnostic questions for you:

1) Assuming you located the hole(s) in the tube, are they on the tire or rim side?

2) Do you pump up your tires to the recommended minimum pressure?

3) Did you inspect the tire to see if there is a thorn/nail/staple in the tire that is causing the repeated flats?

4) How many holes in the tube per flat? (Look close, often two holes can me a few mm apart, referred to as a snakebite) .

5) Are goat heads or other thorny plants ubiquitous to the area? (LBS or other local riders would know).

6) To help future diagnostics, you might want to index the rim's valve stem hole to a fixed feature on the tire, like the center of the tire's label. Then, in the future, you notice a pattern like "the flat is always at the 3:00 position", and item #3 may apply.
MudPie is offline   Reply With Quote

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 PM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.
  • Ask a Question
    get answers from real people!
Click to start entering your question.