Change wheel = RD readjustment?
#1
Senior Member
Thread Starter
Join Date: Oct 2006
Location: Sydney, AU
Posts: 948
Bikes: Bianchi, Ridley, GT
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Change wheel = RD readjustment?
Just wondering, is it normal to need to readjust the RD after a rear wheel change?
I switch b/n my Fulcrum Racing 1 (Veloce 12-25) and Mavic Ksyrium ES (Chorus 12-25), and each time I had to readjust the RD to get it running smoothly again. It seemed that the outer limit position is different b/n the two.
Any suggestions?
I switch b/n my Fulcrum Racing 1 (Veloce 12-25) and Mavic Ksyrium ES (Chorus 12-25), and each time I had to readjust the RD to get it running smoothly again. It seemed that the outer limit position is different b/n the two.
Any suggestions?
#2
Senior Member
Join Date: Feb 2004
Location: St Peters, Missouri
Posts: 30,225
Bikes: Catrike 559 I own some others but they don't get ridden very much.
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 1572 Post(s)
Liked 642 Times
in
363 Posts
Yeah. In a perfect world you wouldn't have to readjust your derailleur but, in real life, it's common. Sometimes you have to fiddle with your brakes too.
#3
Senior Member
Thread Starter
Join Date: Oct 2006
Location: Sydney, AU
Posts: 948
Bikes: Bianchi, Ridley, GT
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Originally Posted by Retro Grouch
Yeah. In a perfect world you wouldn't have to readjust your derailleur but, in real life, it's common. Sometimes you have to fiddle with your brakes too.
#4
Mmmmm potatoes
Join Date: Sep 2006
Location: Idaho
Posts: 1,921
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
That seems odd to me. My cross bike has 2 sets of wheels (11-23 & 12-25), and I don't have any issues swapping the wheels. Any differences in the cassettes?
#5
Making a kilometer blurry
Originally Posted by idcruiserman
That seems odd to me. My cross bike has 2 sets of wheels (11-23 & 12-25), and I don't have any issues swapping the wheels. Any differences in the cassettes?
#6
Senior Member
Join Date: Aug 2005
Posts: 1,616
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Originally Posted by waterrockets
It's a hub thing. Some of them snuggle the freehub up to the right dropout better than others.
Bob
#7
Senior Member
Join Date: Sep 2006
Posts: 353
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Really? After my old wheel blew up, trek sent me another one as a replacement. Same wheel, but the brakes were off and its not shifting as smoothly.
#8
fender bender
Join Date: Nov 2006
Location: St Paul, MN
Posts: 67
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Sometimes you can play around with spacers behind one of the cassettes to make them match once the wheel is in the frame. Every once in a while this also can be done by respacing the hub axles, but is harder to do on modern wheels/hubs. You should be able to do this so the only monkeying is some brake pad width adjustment.
#9
30 YR Wrench
Join Date: Aug 2005
Location: Oxford, OH
Posts: 2,006
Bikes: Waterford R-33, Madone 6.5, Trek 520
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 3 Times
in
2 Posts
Originally Posted by Bobby Lex
And it's a dish thing. If the two wheels aren't dished exactly the same (not a millimeter or two off), then you have to tweak the derailleur.
Bob
Bob
When we have customers who are buying a new bike or wheelset, we offer to tune the cassette positions on the hubs so that no adjustments are ever necessary when changing wheels. It's nice to know you can just throw it in there and have it work!
#10
30 YR Wrench
Join Date: Aug 2005
Location: Oxford, OH
Posts: 2,006
Bikes: Waterford R-33, Madone 6.5, Trek 520
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 3 Times
in
2 Posts
Originally Posted by Adiankur
Really? After my old wheel blew up, trek sent me another one as a replacement. Same wheel, but the brakes were off and its not shifting as smoothly.
#11
Over the hill
Join Date: Mar 2006
Location: Los Angeles, CA
Posts: 24,342
Bikes: Giant Defy, Giant Revolt
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 988 Post(s)
Liked 1,187 Times
in
682 Posts
Bikewise is correct, dishing is refering to the location of the rim, which does not affect the hub. But if Bobby Lex meant that some hubs can be offset more or less than others, that would be correct (like waterrockets said). That being said, I had only minor adjustment needed when I was swapping between an Ultegra 8 speed rear and a Dura Ace 7 speed hub modified with a longer axle and an 8 speed custom Mavic freehweel. So you shouldn't need more than a few twists. Try to find a happy medium between the two wheels and then the twists should balance it out.
#12
Senior Member
Join Date: Aug 2005
Posts: 1,616
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Originally Posted by BikeWise1
I'm not sure where you're going with that...
Bob
#14
Making a kilometer blurry
Originally Posted by lennyk
I would have thought the only thing affected by dish would be the brakes spacing from the rim
#15
Senior Member
Join Date: Aug 2005
Posts: 1,616
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Originally Posted by waterrockets
This is correct. Dish and rear der adjustment are completely unrelated. Even if you have no rim or spokes at all, the same der adjustment applies.
Dish pulls the hub right or left. That will affect how far the derailleur has to travel, because the derailleur is independent of the hub. Therefore the derailleur travel limit screws may have to be adjusted if you switch wheels.
Bob
#16
Over the hill
Join Date: Mar 2006
Location: Los Angeles, CA
Posts: 24,342
Bikes: Giant Defy, Giant Revolt
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 988 Post(s)
Liked 1,187 Times
in
682 Posts
Originally Posted by Bobby Lex
Nope.
Dish pulls the hub right or left.
Bob
Dish pulls the hub right or left.
Bob
edit: There IS one way to adjust the position of the hub, but that would require spacers, and that still would not alter the dish, but rather make it necessary to adjust the dish on the spokes.
#17
Senior Member
Join Date: Feb 2005
Location: Oklahoma
Posts: 9,438
Bikes: Trek 5500, Colnago C-50
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Likes: 0
Liked 7 Times
in
6 Posts
Originally Posted by Bobby Lex
Nope.
Dish pulls the hub right or left. That will affect how far the derailleur has to travel, because the derailleur is independent of the hub. Therefore the derailleur travel limit screws may have to be adjusted if you switch wheels.
Bob
Dish pulls the hub right or left. That will affect how far the derailleur has to travel, because the derailleur is independent of the hub. Therefore the derailleur travel limit screws may have to be adjusted if you switch wheels.
Bob
Al
#18
cab horn
Join Date: Jun 2004
Location: Toronto
Posts: 28,353
Bikes: 1987 Bianchi Campione
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 42 Post(s)
Likes: 0
Liked 25 Times
in
18 Posts
Originally Posted by Bobby Lex
Nope.
Dish pulls the hub right or left. That will affect how far the derailleur has to travel, because the derailleur is independent of the hub. Therefore the derailleur travel limit screws may have to be adjusted if you switch wheels.
Bob
Dish pulls the hub right or left. That will affect how far the derailleur has to travel, because the derailleur is independent of the hub. Therefore the derailleur travel limit screws may have to be adjusted if you switch wheels.
Bob
#20
Senior Member
Thread Starter
Join Date: Oct 2006
Location: Sydney, AU
Posts: 948
Bikes: Bianchi, Ridley, GT
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Yes, I understand that dishing has nothing to do with this problem. But the mention hub flange offset makes me wonder if that's the setting that needs/should be adjusted on one or the other wheel? Or should one just stay with the spec and not touch it and live with the RD adjustments each time one change wheel.
#21
Senior Member
Join Date: Feb 2004
Location: St Peters, Missouri
Posts: 30,225
Bikes: Catrike 559 I own some others but they don't get ridden very much.
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 1572 Post(s)
Liked 642 Times
in
363 Posts
If it was my bike and I changed wheels very often, I'd make it work.
You probably need to stick about a 1mm washer under drive side locknut on one of the wheels. The trick is figuring out which wheel needs to be modified.
You probably need to stick about a 1mm washer under drive side locknut on one of the wheels. The trick is figuring out which wheel needs to be modified.
#22
Senior Member
Thread Starter
Join Date: Oct 2006
Location: Sydney, AU
Posts: 948
Bikes: Bianchi, Ridley, GT
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Thanks guys!
My second free service (part of bike purchase) is due soon, I'll get the LBS to figure this spacing thing out. Given that I bought both the bike and the extra Mavic wheels from them, they won't have a lot of room for excuses.
My second free service (part of bike purchase) is due soon, I'll get the LBS to figure this spacing thing out. Given that I bought both the bike and the extra Mavic wheels from them, they won't have a lot of room for excuses.
#23
cab horn
Join Date: Jun 2004
Location: Toronto
Posts: 28,353
Bikes: 1987 Bianchi Campione
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 42 Post(s)
Likes: 0
Liked 25 Times
in
18 Posts
Originally Posted by urbanknight
Haha, I beat Al and Operator to it
Goddamnit!
#24
Senior Member
Join Date: Feb 2005
Location: Oklahoma
Posts: 9,438
Bikes: Trek 5500, Colnago C-50
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Likes: 0
Liked 7 Times
in
6 Posts
Originally Posted by operator
The one time I stop refreshing the mechanics forum every 30seconds I get beat by urbankinght.
Goddamnit!
Goddamnit!
#25
Making a kilometer blurry
Originally Posted by Bobby Lex
Nope.
Dish pulls the hub right or left. That will affect how far the derailleur has to travel, because the derailleur is independent of the hub. Therefore the derailleur travel limit screws may have to be adjusted if you switch wheels.
Bob
Dish pulls the hub right or left. That will affect how far the derailleur has to travel, because the derailleur is independent of the hub. Therefore the derailleur travel limit screws may have to be adjusted if you switch wheels.
Bob