"The 33"-Road Bike Racing We set this forum up for our members to discuss their experiences in either pro or amateur racing, whether they are the big races, or even the small backyard races. Don't forget to update all the members with your own race results.

rear wheel losing contact

Old 05-07-08, 04:28 PM
  #1  
bad_mojo
The Loneliest Domestique
Thread Starter
 
bad_mojo's Avatar
 
Join Date: Aug 2007
Location: St. Louis, MO
Posts: 111
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
rear wheel losing contact

So lately I've had some issues with my rear wheel coming up off of the pavement. It had mostly been happening during practice when I would start in a super-high gear and start from 5 mph to 35mph without changing gears. Last night in a crit it happened in the final sprint. Admittedly I was probably starting in a gear too high but I couldn't get going because of the wheel thing. What is the deal? Am I trying to sprint too far forward? I've also been trying to use my upper body a bit more (pulling up on the bars).
bad_mojo is offline  
Old 05-07-08, 04:30 PM
  #2  
El Diablo Rojo
Banned.
 
El Diablo Rojo's Avatar
 
Join Date: May 2006
Location: ATX, Ex So Cal
Posts: 11,058

Bikes: Ridley Noah-Scott Addict-Orbea Ordu

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It's a weight distribution issue. You most likely leaning too far forward while out of the saddle. I used to have the same problem, I solved it by learning to sprint on rollers. Now I'm pretty centered on the bike and my rear wheel is in constant contact with the pavement.
El Diablo Rojo is offline  
Old 05-07-08, 04:34 PM
  #3  
Treefox
Young and unconcerned
 
Treefox's Avatar
 
Join Date: Apr 2006
Location: Merry Land
Posts: 4,123

Bikes: Yeah, I got a few.

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Diablo's post is probably right on. Interesting problem though. I certainly pick up my front wheel when accelerating.

(apparently it looks suitably scary to others when gunning it at TT starts, having my front wheel bouncing around)
Treefox is offline  
Old 05-07-08, 04:48 PM
  #4  
Apus^2
Senior Member
 
Join Date: Sep 2007
Location: Looking for my right leg muscles.
Posts: 1,202

Bikes: 2000 Cannondale CAAD3 Triple 105/Ultegra

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
+1 on the weight distribution. If you had a picture you would probably see your center of gravity farther in front of the bottom bracket than it should be. Work on your form and concentrate on sprinting with your thighs touching the sides of the saddle.
Apus^2 is offline  
Old 05-07-08, 04:49 PM
  #5  
carpediemracing
Super Moderator
 
Join Date: Feb 2007
Location: Tariffville, CT
Posts: 15,087

Bikes: Tsunami Bikes

Mentioned: 33 Post(s)
Tagged: 0 Thread(s)
Quoted: 260 Post(s)
Originally Posted by Treefox View Post
Diablo's post is probably right on. Interesting problem though. I certainly pick up my front wheel when accelerating.

(apparently it looks suitably scary to others when gunning it at TT starts, having my front wheel bouncing around)
+1 on moving your weight back. But don't forget how to break that rear wheel loose - doing it on sand makes for nice rooster tails. And a bit of chain cleaning when you get home.

+1 on lifting front tire. Steve Hegg, in training for the the 84 Olympic pursuit which he eventually won, was found to lift his front wheel for 1-1.5 revolutions at the start of the event. This on a 24" front wheel funny bike.

cdr
carpediemracing is offline  
Old 05-07-08, 05:08 PM
  #6  
grolby
Senior Member
 
grolby's Avatar
 
Join Date: Jan 2005
Location: BOSTON BABY
Posts: 9,630
Mentioned: 26 Post(s)
Tagged: 0 Thread(s)
Quoted: 235 Post(s)
Remember when you sprint to keep your butt from going too far forward. That both keeps the wheel down and keeps you in a good position to generate power.

I've had my rear wheel break free sprinting out of a corner onto an uphill in a crit. I usually move forward a bit on hills, and on the bell lap we were surging pretty hard. It was pretty cool, actually, I felt like such a beast (even though I'm not!).
grolby is offline  
Old 05-07-08, 05:42 PM
  #7  
Snuffleupagus
Aut Vincere Aut Mori
 
Snuffleupagus's Avatar
 
Join Date: Nov 2004
Location: Chapel Hill, NC
Posts: 4,166

Bikes: Irish Cycles Tir na Nog, Jack Kane Team Racing, Fuji Aloha 1.0, GT Karakoram, Motobecane Fly Team

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Originally Posted by carpediemracing View Post
+1 on moving your weight back. But don't forget how to break that rear wheel loose - doing it on sand makes for nice rooster tails. And a bit of chain cleaning when you get home.

+1 on lifting front tire. Steve Hegg, in training for the the 84 Olympic pursuit which he eventually won, was found to lift his front wheel for 1-1.5 revolutions at the start of the event. This on a 24" front wheel funny bike.

cdr
Which begs the question, can anyone do - with video evidence - a trackstand burnout? It's on my life list of things to be able to do Weight all the way forward, front brake locked up - and smoke emanating from the rear tire...
Snuffleupagus is offline  
Old 05-07-08, 06:30 PM
  #8  
justinb
Senior Member
 
Join Date: Jan 2006
Posts: 626
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Sounds like a recipe for OTB.
justinb is offline  
Old 05-07-08, 06:34 PM
  #9  
Snuffleupagus
Aut Vincere Aut Mori
 
Snuffleupagus's Avatar
 
Join Date: Nov 2004
Location: Chapel Hill, NC
Posts: 4,166

Bikes: Irish Cycles Tir na Nog, Jack Kane Team Racing, Fuji Aloha 1.0, GT Karakoram, Motobecane Fly Team

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Originally Posted by justinb View Post
Sounds like a recipe for OTB.
Not in a race, I'm talking about screwing around after a race - while quite possibly inebriated.
Snuffleupagus is offline  
Old 05-07-08, 06:34 PM
  #10  
fix
yeahh, becky
 
fix's Avatar
 
Join Date: Apr 2006
Location: DC
Posts: 1,395

Bikes: 1990 Kotter Albuch, 2005 Empella Spaar Select Cross, 2007 Ridley Aedon

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Originally Posted by Snuffleupagus View Post
Which begs the question, can anyone do - with video evidence - a trackstand burnout? It's on my life list of things to be able to do Weight all the way forward, front brake locked up - and smoke emanating from the rear tire...
This is also on my list of things to do. It's a close second behind making best-of-craigslist.
fix is offline  
Old 05-07-08, 06:57 PM
  #11  
slvoid
2-Cyl, 1/2 HP @ 90 RPM
 
slvoid's Avatar
 
Join Date: Oct 2003
Location: NYC
Posts: 15,762

Bikes: 04' Specialized Hardrock Sport, 03' Giant OCR2 (SOLD!), 04' Litespeed Firenze, 04' Giant OCR Touring, 07' Specialized Langster Comp

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Originally Posted by Snuffleupagus View Post
Which begs the question, can anyone do - with video evidence - a trackstand burnout? It's on my life list of things to be able to do Weight all the way forward, front brake locked up - and smoke emanating from the rear tire...
http://video.google.com/videoplay?do...KDg_nFAQ&hl=en

close enough
slvoid is offline  
Old 05-07-08, 07:31 PM
  #12  
mike9903
Senior Member
 
mike9903's Avatar
 
Join Date: Jan 2006
Location: San Antonio, Texas
Posts: 1,465

Bikes: 09 Orbea Orca

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Originally Posted by slvoid View Post
That is AWESOME!!!!!
mike9903 is offline  
Old 05-07-08, 07:48 PM
  #13  
Jynx
.....
 
Jynx's Avatar
 
Join Date: Aug 2006
Location: Long Island
Posts: 4,816

Bikes: 2006 Cannondale CAAD8

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Heres a video on what to do:

http://www.youtube.com/watch?v=z7qNAbcibZU
Jynx is offline  
Old 05-07-08, 07:48 PM
  #14  
brians647
R.E.Member
 
brians647's Avatar
 
Join Date: Oct 2006
Location: CT
Posts: 863

Bikes: Cannondale, Kirk

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Originally Posted by slvoid View Post
Classic! And he didn't even get his robe caught in the wheels!
brians647 is offline  
Old 05-07-08, 08:12 PM
  #15  
waterrockets 
Making a kilometer blurry
 
waterrockets's Avatar
 
Join Date: May 2006
Location: Austin (near TX)
Posts: 26,130

Bikes: rkwaki's porn collection

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Don't forget about pedaling form (I can't believe I'm first in with this):

If you are at max power and your form starts to suffer, you might be under power at the bottom of the stroke, when the pedal can't go down any more. This sends your body up, and that turns into a hop. You might just be doing it with your longer or stronger leg, so only once per revolution.
waterrockets is offline  
Old 05-07-08, 08:30 PM
  #16  
merlinextraligh
pan y agua
 
merlinextraligh's Avatar
 
Join Date: Aug 2005
Location: Jacksonville
Posts: 30,331

Bikes: Wilier Zero 7; Merlin Extralight; Co-Motion Robusta; Schwinn Paramount; Motobecane Phantom Cross; Cervelo P2; Motebecane Ti Fly 29er; Calfee Dragonfly Tandem

Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 867 Post(s)
Originally Posted by Snuffleupagus View Post
Which begs the question, can anyone do - with video evidence - a trackstand burnout? It's on my life list of things to be able to do Weight all the way forward, front brake locked up - and smoke emanating from the rear tire...
give me a low enough gear and no problem.

We used to do this as kids all the time. The key is an extremely low gear. (Inverse of the reason why you start off in a car on ice in second gear.)
merlinextraligh is offline  
Old 05-07-08, 08:39 PM
  #17  
bad_mojo
The Loneliest Domestique
Thread Starter
 
bad_mojo's Avatar
 
Join Date: Aug 2007
Location: St. Louis, MO
Posts: 111
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Originally Posted by waterrockets View Post
Don't forget about pedaling form (I can't believe I'm first in with this):

If you are at max power and your form starts to suffer, you might be under power at the bottom of the stroke, when the pedal can't go down any more. This sends your body up, and that turns into a hop. You might just be doing it with your longer or stronger leg, so only once per revolution.
How do I tell if during a sprint its my form?
bad_mojo is offline  
Old 05-07-08, 09:11 PM
  #18  
waterrockets 
Making a kilometer blurry
 
waterrockets's Avatar
 
Join Date: May 2006
Location: Austin (near TX)
Posts: 26,130

Bikes: rkwaki's porn collection

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
In my experience, it is your form. Weight distribution can suppress the symptom, but if your body wasn't jumping, neither would your wheel.
waterrockets is offline  
Old 05-08-08, 12:26 AM
  #19  
VosBike
Outgunned and outclassed
 
Join Date: Oct 2003
Location: The Springs, CO
Posts: 998
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
snuff,
burnouts can indeed be drunk...I mean done.

1)almost(not quite) lock the front
2) low gear, like 39x25 or 23
3) try to do a wheelie with your front brake on and your weight front-wards
4)pedal just so fast. here's where the beers help.
VosBike is offline  
Old 05-08-08, 11:15 AM
  #20  
slim_77
Senior Member
 
slim_77's Avatar
 
Join Date: Jul 2006
Location: chicago,Il
Posts: 2,401

Bikes: yes please

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Originally Posted by waterrockets View Post
In my experience, it is your form. Weight distribution can suppress the symptom, but if your body wasn't jumping, neither would your wheel.
This has me thinking...I've had a few problems with this when I jump for a break or a sprint--'till I settle down and sit down and grind it out. I thought had it pinned to pulling up to hard on the pedal stroke and my weight shifted too far to the front while standing.

So, I should level out my upperbody and smooth out my stroke. Any tips for this? Thighs rubbing the saddle is an interesting one...any others?
slim_77 is offline  
Old 05-10-08, 10:18 PM
  #21  
Bnjmn
Senior Member
 
Bnjmn's Avatar
 
Join Date: Jun 2007
Location: Brooklyn
Posts: 324
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I was lifting my rear tire a bit on sprints, and not b/c I can actually sprint.
Keeping my thighs near the saddle took care of the issue (thanks WR).
Another thing you may want to do is stay in the drops- it is hard to get into the wrong (too upright) position if you are in the drops + keeping your legs near the saddle. A side benefit is that you will be much lower and more compact = more aero and in control.
In any case- your sprinting position should be different than your out-of-saddle climbing position.
Bnjmn is offline  
Old 05-11-08, 05:39 AM
  #22  
slim_77
Senior Member
 
slim_77's Avatar
 
Join Date: Jul 2006
Location: chicago,Il
Posts: 2,401

Bikes: yes please

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I've been practicing this, and looking for pics. It looks like pros lift their just their hips yet keep them behind the bb and almost directly over the saddle. I am just starting to work on sprints, so it will take some time to get comfortable, right now I feel terribly awkward in that position.
slim_77 is offline  

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.