Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Changing a Tire in the TDF

Notices
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.

Changing a Tire in the TDF

Old 07-19-10, 08:08 AM
  #1  
Equinox
Senior Member
Thread Starter
 
Join Date: Sep 2005
Posts: 921
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 160 Post(s)
Likes: 0
Liked 4 Times in 3 Posts
Changing a Tire in the TDF

I'm impressed with how fast the mechanics are. When i take off my rear wheel, I always shift into the smallest cog. The riders in the Tour don't appear to do that. Am I wrong?
Equinox is offline  
Old 07-19-10, 08:23 AM
  #2  
JonathanGennick 
Senior Member
 
JonathanGennick's Avatar
 
Join Date: Apr 2007
Location: Munising, Michigan, USA
Posts: 4,131

Bikes: Priority 600, Priority Continuum, Devinci Dexter

Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 685 Post(s)
Likes: 0
Liked 55 Times in 37 Posts
Small cog, large cog, so long as you can get the wheel back on again, right?

I generally go small cog because otherwise my brain leaks and I tend to forget which cog the chain needs to go around when I put the wheel back on.

BTW, I am not very fast. I am not TDF mechanic material.
JonathanGennick is offline  
Old 07-19-10, 08:25 AM
  #3  
sch
Senior Member
 
Join Date: May 2003
Location: Mountain Brook. AL
Posts: 3,900
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 276 Post(s)
Likes: 0
Liked 91 Times in 72 Posts
Depends on how greasy you want your hands, with the rider holding the bike,
the mechanic can easily manipulate the chain into approximately the right cog
manually, and of course the rider will get a manual pushoff til he is clipped in
and has adjusted the RD. For the rest of us, shifting to the small cog is a bit
easier though slower.
sch is offline  
Old 07-19-10, 08:29 AM
  #4  
Bianchigirll 
Bianchi Goddess
 
Bianchigirll's Avatar
 
Join Date: Apr 2009
Location: Shady Pines Retirement Fort Wayne, In
Posts: 27,436

Bikes: Too many to list here check my signature.

Mentioned: 145 Post(s)
Tagged: 2 Thread(s)
Quoted: 1976 Post(s)
Liked 795 Times in 491 Posts
actually as I was reading this I was watching the Mavic neutral support mechanic fumble with Nicholas Roche's front wheel!

I think the riders do shift it inot the small cog but also I bet the mechanics practice alot.

I worked as a 'pit' mechanic and in a neutral support van a few times, the hard part is dealing with the panicky rider.
__________________
Bianchis '90 Proto, '90 Campione del Fausto Giamondi Specialisma Italiano Mundo, '91 Boarala 'cross, '93 Project 3, '86 Volpe, '97 Ti Megatube, '93 Reparto Corse SBX

Others but still loved; '80 Batavus Professional, '87 Cornelo, '?? Jane Doe (still on the drawing board), '90ish Haro Escape SLX Bertoni "Speckled Trout"
Bianchigirll is offline  
Old 07-19-10, 08:33 AM
  #5  
fietsbob
Banned
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 43,599

Bikes: 8

Mentioned: 197 Post(s)
Tagged: 0 Thread(s)
Quoted: 7607 Post(s)
Liked 1,318 Times in 828 Posts
It is a Wheel change , rather than a tire change, since the pro tires are glued on sew-ups and spares are glued up in advance.

It is only rare , like major sponsor requirement, that a Pro team will use a wire bead tire.
fietsbob is offline  
Old 07-19-10, 08:43 AM
  #6  
Equinox
Senior Member
Thread Starter
 
Join Date: Sep 2005
Posts: 921
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 160 Post(s)
Likes: 0
Liked 4 Times in 3 Posts
I did mean a wheel change. If you accidently put the chain on the wrong cog, does that mess up the indexing for the other gears?
Equinox is offline  
Old 07-19-10, 08:47 AM
  #7  
chevy42083
steel lover
 
Join Date: Apr 2007
Location: Houston
Posts: 1,316

Bikes: Bianchi Alloro, Miyata 710, Fuji Espree Fixie convert

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
It should just shift to the gear you previously had it in. Might be a jolt if it jumps several gears, but just eyeballing it should put the chain in the same range of the cassette that it should be in.
chevy42083 is offline  
Old 07-19-10, 09:00 AM
  #8  
Zouf
Senior Member
 
Join Date: Aug 2004
Posts: 736
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Equinox View Post
I did mean a wheel change. If you accidently put the chain on the wrong cog, does that mess up the indexing for the other gears?
No, it will shift back to the right place as soon as you fwd pedal. The issue is more of you back-pedal, the chain may jam. By finishing the job with a single turn of the crank while the rider still holds the rear wheel off the ground, you resolve the entire issue.
Zouf is offline  
Old 07-19-10, 09:03 AM
  #9  
Equinox
Senior Member
Thread Starter
 
Join Date: Sep 2005
Posts: 921
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 160 Post(s)
Likes: 0
Liked 4 Times in 3 Posts
Ah, yes. I see. Thank you.
Equinox is offline  
Old 07-19-10, 09:11 AM
  #10  
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 35,964

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

Mentioned: 125 Post(s)
Tagged: 1 Thread(s)
Quoted: 4366 Post(s)
Likes: 0
Liked 32 Times in 31 Posts
It really doesn't matter which cog the bike is in except that some larger ones are a problem clearing the idlers.

The trick is to remember which gear the bike was in and put the chain back on the same one. That ensures that the wheel will line up and slide into the dropouts smoothly without the RD pushing it to one side or another. On my own bike I always shift to the smallest cog, either before removing the wheel, or before mounting it. At my age habit trumps memory every time.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
JJ121591
Bicycle Mechanics
20
11-05-20 11:38 PM
cptsilver
Classic & Vintage
15
06-21-13 09:23 PM
MEversbergII
Bicycle Mechanics
18
10-04-12 08:24 PM
bianchi10
Road Cycling
43
09-02-12 12:58 PM
paipo
Singlespeed & Fixed Gear
13
09-16-10 09:26 AM

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 - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.