Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About
It is currently Mon May 30, 2016 12:03 am
Recently the board software has been updated and there are some known bugs/failures:
- Avatars are currently not being displayed ✔ FIXED
- Tapatalk connection is currently broken ✔ FIXED

If you find more errors please post it here: http://weightweenies.starbike.com/forum/viewtopic.php?f=7&t=139062


All times are UTC+01:00





Post new topic  Reply to topic  [ 10 posts ] 
Author Message
PostPosted: Wed Aug 08, 2012 3:47 pm 
Offline

Joined: Wed May 24, 2006 6:25 pm
Posts: 1402
I just picked up my first CX bike a couple of weeks ago and I've had it with flats already. It came with Specialized Tracer Sport tires and regular tubes.

I know tubulars are where it's at for racing but right now I'd really just like to go and ride, not change tubes.

Should I convert my setup to tubeless, fill the tubes with sealant and/or find a heavier tire?

What has been your most hassle free combo?

_________________
"Nothing compares to the simple pleasures of a bike ride," said John F. Kennedy, a man who had the pleasure of Marilyn Monroe.


Top
   
PostPosted: Wed Aug 08, 2012 7:40 pm 
Offline

Joined: Sun Feb 25, 2007 5:05 pm
Posts: 83
Location: Netherlands
What is causing your flats and what kind of terrain are you riding in? That should give you the best direction on a solution.

--Pinch flats: Clincher cross tires, especially when ridden on forrest "singletrack" as many people train on, need appropriate pressures. As general rule at least 10 psi more than you would run a tubed 2.1 mtn tire on the same trail and accounting for a fully rigid bike. If you're new to cross and still learning "how low can you go" then you've probably figured that out by now and need to add a little pressure with appropriate adjustment for terrain.

--Thorns/glass/sharp objects: Is what it is. Either be more careful when riding through stuff, use sealant that works in tubes or any of the other standard ideas to flat less. Tubeless might help but see "pinch flats" as you can't ride in the woods on a rigid bike at crazy low pressures on 32c tires and understand there will be a learning curve mounting/pressures/compatible tires if you're not already comfortable with tubeless conversions.

--mystery flats: check rims strips and tire bead for problems. Low pressures can often rip valve stems as the tires creep on the rims.

Without knowing why you're flatting there is no best solution. As reference at 78kg I race on Griffo tubs at 28-30 psi, pit bike has Griffo opens with latex tubes at 34-38 psi and "in the woods" wheels have Griffo opens at 45-50 psi with standard tubes. No sealant in anything. Pressure varies a little based on conditions but that's an average and I only flat due to the odd thorn in the woods.

_________________
after 2 drinks I'm a loser, after 3 a star


Top
   
PostPosted: Wed Aug 08, 2012 8:21 pm 
Offline
User avatar

Joined: Wed May 13, 2009 5:23 pm
Posts: 956
Location: Denmark
Ypsylon wrote:
What has been your most hassle free combo?


Tubulars. I've had a pair of Tufo Cubus (not the Flexus version) for two seasons. They've seen loads of training as well as racing. Not a single flat (with sealant).

That being said, if you don't want to go out and buy another wheelset, and assuming your problem is with pinch flats (is this the case?), then tubeless might be something for you.

I haven't found a way to get it to work properly with my Ultegra wheelset and Hutchinson Bulldogs. Sure, I'm not getting any pinch flats, but they burp if I run them at the same pressures as my tubulars. Maybe I need to try another tire.

_________________
Cannondale F-Si Team 2015
Cannondale F29 Team 2014
Cannondale F29 Carbon 1 2013


Top
   
PostPosted: Thu Aug 09, 2012 1:33 am 
Offline

Joined: Tue Aug 05, 2008 1:15 am
Posts: 156
Last year's tubulars on alloy wheelset.


Top
   
PostPosted: Thu Aug 09, 2012 7:52 am 
Offline

Joined: Wed May 24, 2006 6:25 pm
Posts: 1402
Cheers for the replies.

I've had both pinch flats and stuff penetrating my innertube on both the front and rear.

After my first pinch flat I upped the pressure to 50 front, 60 rear and figured I'd lower it from there. While it did help, I still had one more pinch flat. And the ride didn't really improve.

I suppose part of the problem is me following around the girl-friend who's riding my MTB.

I'm half hoping to have a pair of tub wheels when the actual cross season starts, but I'm not planning on racing competitively, so I'm wondering if tubeless might be easier and cheaper.

_________________
"Nothing compares to the simple pleasures of a bike ride," said John F. Kennedy, a man who had the pleasure of Marilyn Monroe.


Top
   
PostPosted: Thu Aug 09, 2012 3:47 pm 
Offline

Joined: Tue Dec 16, 2003 4:24 am
Posts: 956
If you're riding your cross bike on mtn.bike trails you're going to flat. You can keep adding air but you'll be bouncing off of every root on the trail. It's fun to ride your cross bike in the trails but it's dumb and in my experience it doesn't work.
I would try tubeless and see what happens. Seems like the results are mixed. I will try it next year. I'll hopefully have a tubeless ready wheelset that I can put fat tires on.


Top
   
PostPosted: Sun Sep 16, 2012 11:49 pm 
Offline

Joined: Thu Jun 14, 2012 3:01 pm
Posts: 86
If you're pinch flatting, it may be time to suck it up and get some tubulars. I know, I 'mtn biked' on my Crosshairs a bunch with some Tufo T34s on it. One ride I dimpled the rear rim on a baby-head rock without realizing it till I got home.

...so if you're JRA those T-series Tufos are some bombproof tires. They're heavy and don't ride especially nicely compared to some of the nicer stuff, but they make up for it by wearing like iron.

HTH

M


Top
   
PostPosted: Mon Sep 17, 2012 8:33 pm 
Offline

Joined: Fri Aug 06, 2010 1:35 pm
Posts: 1952
Location: Geneva
It's not a super smooth option but I've been training on Schwalbe Land Cruisers pumped up to about 3-4bar depending. No flats and I ride plenty of mtb trains, but they're pretty heavy and bouncy.


Top
   
PostPosted: Mon Sep 17, 2012 11:39 pm 
Offline

Joined: Mon May 30, 2011 5:42 am
Posts: 29
I had the same problem with the tracer sports that came with my Crux (6 flats in one week pinches and penetrating punctures). I swapped them out for some Sammy slicks for commuting/hard pack and use a combination of Racing Ralphs and CX pro's for the dirt and racing since this change I have done 1800Kms with only one flat.


Top
   
PostPosted: Mon Sep 17, 2012 11:47 pm 
Offline
User avatar

Joined: Thu Jun 17, 2010 5:03 pm
Posts: 2014
Location: San Francisco Peninsula
Challenge Grifo tubulars with Stan's.

Image

_________________
2013 Wilier Cento1 SR || 2009 Ridley Crossbow || 2011 Yeti AS-R 5 Carbon


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 10 posts ] 

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Gravel tires vs Road tires (pure speed)

[ Go to page: 1 2 ]

in Cyclocross / Gravel / Touring

wheelsONfire

25

1431

Tue May 24, 2016 11:18 am

wheelsONfire View the latest post

There are no new unread posts for this topic. Train on what you race....?

[ Go to page: 1 2 ]

in Everything wheels

wolfesquire

16

1013

Wed Dec 02, 2015 5:44 pm

Canadian View the latest post

There are no new unread posts for this topic. What's the coldest temp you'll train outside in?

[ Go to page: 1 2 3 4 5 6 ]

in Training

Citizenfox

80

6939

Tue Apr 12, 2016 12:48 pm

dmulligan View the latest post

There are no new unread posts for this topic. How do I train for an upcoming race?

in Training

PrettyA

8

709

Tue Oct 13, 2015 10:37 pm

AJS914 View the latest post

There are no new unread posts for this topic. Time to replace my Drive train, need some sugestions......

[ Go to page: 1 2 3 ]

in Road

KarlC

42

1740

Mon Apr 04, 2016 7:04 am

addictR1 View the latest post


All times are UTC+01:00


Who is online

Users browsing this forum: No registered users and 4 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited