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


Go Back   > >

Mountain Biking Mountain biking is one of the fastest growing sports in the world. Check out this forum to discuss the latest tips, tricks, gear and equipment in the world of mountain biking.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 09-17-04, 09:18 PM   #1
ssm4ssm4
Member
Thread Starter
 
Join Date: Sep 2004
Bikes:
Posts: 43
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
pinch flats

hey all. I've been a mountainbiker for a while and I've always had a problem with pinch flats. I ride pretty rocky terrain (new england trails) and I ride about 40 psi. What can I do to prevent this? I've spent a fortune on tubes. Thanks.

Sam
ssm4ssm4 is offline   Reply With Quote
Old 09-17-04, 09:22 PM   #2
Maelstrom 
Wood Licker
 
Maelstrom's Avatar
 
Join Date: Apr 2002
Location: Whistler,BC
Bikes: Transition Dirtbag, Kona Roast 2002 and specialized BMX
Posts: 16,885
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
How big are your tires? Do you run thickersidewalls or try to save weight with thin ones?
Maelstrom is offline   Reply With Quote
Old 09-17-04, 09:26 PM   #3
DjRider04
snow
 
DjRider04's Avatar
 
Join Date: Sep 2004
Location: Henniker, USA
Bikes: Rootbeer Bullit, stock......soon to be a transgold V10 w/shivers
Posts: 794
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Run thicker tubes

Switch to tubeless (Stans)

Get larger sidewalled tires

Your pressure should be fine.....
DjRider04 is offline   Reply With Quote
Old 09-18-04, 08:46 AM   #4
BloomBikeShop
BloomBikeShop.com
 
BloomBikeShop's Avatar
 
Join Date: Sep 2004
Location: East Coast
Bikes: A few.
Posts: 473
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I know all about rocky New England trails. I'm an xc racer and one thing I do is run my tires at 50 psi to ward off pinch flats. It's not the best for traction, but it's not usually a problem unless it's wet.

One easy (and cheap) thing you can do is coat your tubes and inside of your tires with baby powder. It keeps them from sticking together so the tube is less likely to pinch.
BloomBikeShop is offline   Reply With Quote
Old 09-18-04, 09:16 AM   #5
Juniper
Digs technical steeps
 
Join Date: Sep 2004
Bikes:
Posts: 510
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by ssm4ssm4
hey all. I've been a mountainbiker for a while and I've always had a problem with pinch flats. I ride pretty rocky terrain (new england trails) and I ride about 40 psi. What can I do to prevent this? I've spent a fortune on tubes. Thanks.

Sam
Have you experimented with different tire pressures? My first thought is you might be running a little low. The tip on dusting the insides with baby powder is a good one, too.
Juniper is offline   Reply With Quote
Old 09-19-04, 03:08 PM   #6
ssm4ssm4
Member
Thread Starter
 
Join Date: Sep 2004
Bikes:
Posts: 43
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks for all the advice. I'll try 50 psi and see what happens. Got to get me some baby powder as well, thanks again.

sam
ssm4ssm4 is offline   Reply With Quote
Old 09-19-04, 04:19 PM   #7
WorldWind
Hardtail
 
WorldWind's Avatar
 
Join Date: Sep 2004
Location: Az. & Ca.
Bikes: Richey Everest, Supercomp, Richey custom handbuilt Road, and others.
Posts: 663
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
50 psi is way to hard for trail ridingÖ.

To stop getting pinch flats you have to get up off your ass and let the tire ride over the terrain. Itís a matter of finesse not tire pressure.

When we leave the pavement and hit the dirt the pressure gets let out to 36-33 or even lower when itís wet. Go around the rocks and hop the roots, itís a dance you canít do sitting down.
WorldWind is offline   Reply With Quote
Old 09-19-04, 05:39 PM   #8
Juniper
Digs technical steeps
 
Join Date: Sep 2004
Bikes:
Posts: 510
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
One consideration is how much you, the rider, weigh.
Juniper is offline   Reply With Quote
Old 09-20-04, 12:42 AM   #9
WorldWind
Hardtail
 
WorldWind's Avatar
 
Join Date: Sep 2004
Location: Az. & Ca.
Bikes: Richey Everest, Supercomp, Richey custom handbuilt Road, and others.
Posts: 663
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Itís more about how light you are on your peddles. Even the skinniest grommet that slams his wheel into edges is going to flat.
WorldWind is offline   Reply With Quote
Old 09-20-04, 08:22 AM   #10
Juniper
Digs technical steeps
 
Join Date: Sep 2004
Bikes:
Posts: 510
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
My riding style is generally out of the saddle and light on the trail. I'm considered pretty nimble when it comes to picking a line. But, at 182#, if I ran my tires at 33-35 lbs I wouldn't have much of a ride; I'd be rimming on every small twig on the path.
Juniper is offline   Reply With Quote
Old 09-20-04, 09:21 AM   #11
rasheed
mmm babaghanouj.
 
rasheed's Avatar
 
Join Date: Aug 2003
Location: toronto, canada.
Bikes: '02 gary fisher tassajara disc, '03 norco fluid 3.0
Posts: 815
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by ssm4ssm4
hey all. I've been a mountainbiker for a while and I've always had a problem with pinch flats. I ride pretty rocky terrain (new england trails) and I ride about 40 psi. What can I do to prevent this? I've spent a fortune on tubes. Thanks.

Sam
when i used to run 2.1s on my fluid i used to get pinch flats often - usually from bunny hops where i didn't get my rear wheel high enough over whatever i was jumping (often a high curb or low ledge or something like that). i changed my tires to tioga dh 2.3s and haven't had a pinch flat since.

given that, my suggestion would be to either run a higher psi, or to get wider tires.
rasheed is offline   Reply With Quote
Old 09-23-04, 12:54 PM   #12
ssm4ssm4
Member
Thread Starter
 
Join Date: Sep 2004
Bikes:
Posts: 43
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
hey

i'm 170, so weight is not a problem. not to brag or anything but i don't sit on my ass during the ride and i'm pretty nimble around rocks. new england is notorious for rocky terrain so i don't think it's my inferior riding skills causing these flats. i'll try the baby powder thing and inflating to 50. i'll give you guys an update. thanks.

sam
ssm4ssm4 is offline   Reply With Quote
Old 09-23-04, 01:12 PM   #13
Juniper
Digs technical steeps
 
Join Date: Sep 2004
Bikes:
Posts: 510
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by ssm4ssm4
hey

i'm 170, so weight is not a problem. not to brag or anything but i don't sit on my ass during the ride and i'm pretty nimble around rocks. new england is notorious for rocky terrain so i don't think it's my inferior riding skills causing these flats. i'll try the baby powder thing and inflating to 50. i'll give you guys an update. thanks.

sam

Please give us a follow-up. There's always a lot of debate reSI's.
Juniper is offline   Reply With Quote
Old 09-26-04, 12:02 AM   #14
Jim311
Senior Member
 
Jim311's Avatar
 
Join Date: Dec 2002
Location: Gainesville, Florida
Bikes:
Posts: 1,791
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Anybody who rides hard will get pinch flats. Running a bajillion PSI is a stupid idea.. I'd rather flat than have no traction and have the bike beat the piss out of me. Tubeless tires are better in pinch flat situations, but it's a total misconception that it's impossible to pinch flat a tubeless tire. How do I know? I've pinch flatted 2 tubeless tires, both due to either improper inflation, or just coming down way to hard on an unfortunately placed sharp rock. They usually pinch at the bead and won't hold much if any pressure. I'd say just learn to ride a little more carefully and lightly, or buy some tougher tires and thicker tubes. Running higher PSI is sort of a lame fix to such a problem IMO.
Jim311 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 02:56 PM.