Re: [RBW] Re: Speed wobble

[Friend]

This is happening on the Homer.  It has a large saddle bag but when I was 
riding yesterday, with maybe 5 or 7 pounds on the rear rack, it still had 
wobble going about 12mph.  I did buy it used but it's the factory fork.  I 
think it may also have something to do with the handlebars.  They are 
albastache on a dirt drop stem so they are pretty high off the steering 
column.  

On Thursday, March 26, 2020 at 5:11:19 PM UTC-4, lambbo wrote:
>
> Dearest Friend, 
>
> Is this happening on the used Homer you bought or the new-from-riv 
> Appaloosa?   I bought my Cheviot used on this list, and it got speed wobble 
> at certain speeds down hills.  Later, I got in an accident and bought a new 
> fork from Rivendell, and the bike no longer wobbles.  I don't know if it 
> was that I re-installed the fork and messed with the headset, or if it was 
> the new fork.   
>
> Good luck! 
>
>
> On Thursday, March 26, 2020 at 2:56:53 PM UTC-4, Cyclofiend Jim wrote:
>>
>> Yeah. That is my experience as well. 
>> Mostly it's about the weight between fore/aft. 
>> They tend to be speed-specific. They'll happen at 18 mph, but not at 17, 
>> for example.
>>
>> Jobst wrote some (fairly strongly opinionated) missives about this - this 
>> came up first: https://www.sheldonbrown.com/brandt/shimmy.html
>>
>> The only time I've had a wobble was one brevet on the Hilsen, in which 
>> I'd aft-loaded 2x the amount of planned gear due to a weather change, had 
>> nothing on the front, and sat up as I crested a hill and glided no handed. 
>> Got a wiggle-wiggle-wiggle and shifted forward slightly, at which point 
>> it stopped. I never managed to reproduce it with more mindful loading.
>>
>> Ride buddy JimG had a long struggle with his Kogswell on this topic - he 
>> had documented it well, which ought to be searchable through his site - 
>> http://yojimg.net/bike/  
>>
>> Jim / cyclofiend
>>
>> On Thursday, March 26, 2020 at 4:46:49 AM UTC-7, Peter White wrote:
>>>
>>> I've never found that wheel alignment, which is actually frame 
>>> alignment, has any effect on wobble. If the frame is out of alignment the 
>>> two wheels will not follow the same line when the bike is moving in a 
>>> straight line. For example, if the rear wheel is tracking to the right of 
>>> the front wheel when moving in a straight line, the bike will tend to turn 
>>> towards the right. This is easiest to feel when riding no hands. But this 
>>> won't cause the bike to wobble.
>>>
>>> Peter White
>>>
>>> On Wed, Mar 25, 2020 at 9:48 PM Fryett  wrote:
>>>
 Are you wheels perfectly aligned within the frame?

 On Monday, March 23, 2020 at 7:01:24 PM UTC-7, Friend wrote:
>
> Does anyone have suggestions for correcting a wobble I get when I ride 
> with no hands?
>
 -- 

>>> -- 
>>> Peter White
>>>
>>

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Re: [RBW] Re: Speed wobble

[lambbo]

Dearest Friend, 

Is this happening on the used Homer you bought or the new-from-riv 
Appaloosa?   I bought my Cheviot used on this list, and it got speed wobble 
at certain speeds down hills.  Later, I got in an accident and bought a new 
fork from Rivendell, and the bike no longer wobbles.  I don't know if it 
was that I re-installed the fork and messed with the headset, or if it was 
the new fork.   

Good luck! 


On Thursday, March 26, 2020 at 2:56:53 PM UTC-4, Cyclofiend Jim wrote:
>
> Yeah. That is my experience as well. 
> Mostly it's about the weight between fore/aft. 
> They tend to be speed-specific. They'll happen at 18 mph, but not at 17, 
> for example.
>
> Jobst wrote some (fairly strongly opinionated) missives about this - this 
> came up first: https://www.sheldonbrown.com/brandt/shimmy.html
>
> The only time I've had a wobble was one brevet on the Hilsen, in which I'd 
> aft-loaded 2x the amount of planned gear due to a weather change, had 
> nothing on the front, and sat up as I crested a hill and glided no handed. 
> Got a wiggle-wiggle-wiggle and shifted forward slightly, at which point it 
> stopped. I never managed to reproduce it with more mindful loading.
>
> Ride buddy JimG had a long struggle with his Kogswell on this topic - he 
> had documented it well, which ought to be searchable through his site - 
> http://yojimg.net/bike/  
>
> Jim / cyclofiend
>
> On Thursday, March 26, 2020 at 4:46:49 AM UTC-7, Peter White wrote:
>>
>> I've never found that wheel alignment, which is actually frame alignment, 
>> has any effect on wobble. If the frame is out of alignment the two wheels 
>> will not follow the same line when the bike is moving in a straight line. 
>> For example, if the rear wheel is tracking to the right of the front wheel 
>> when moving in a straight line, the bike will tend to turn towards the 
>> right. This is easiest to feel when riding no hands. But this won't cause 
>> the bike to wobble.
>>
>> Peter White
>>
>> On Wed, Mar 25, 2020 at 9:48 PM Fryett > 
>> wrote:
>>
>>> Are you wheels perfectly aligned within the frame?
>>>
>>> On Monday, March 23, 2020 at 7:01:24 PM UTC-7, Friend wrote:

 Does anyone have suggestions for correcting a wobble I get when I ride 
 with no hands?

>>> -- 
>>>
>> -- 
>> Peter White
>>
>

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Re: [RBW] Re: Speed wobble

[Cyclofiend Jim]

Yeah. That is my experience as well. 
Mostly it's about the weight between fore/aft. 
They tend to be speed-specific. They'll happen at 18 mph, but not at 17, 
for example.

Jobst wrote some (fairly strongly opinionated) missives about this - this 
came up first: https://www.sheldonbrown.com/brandt/shimmy.html

The only time I've had a wobble was one brevet on the Hilsen, in which I'd 
aft-loaded 2x the amount of planned gear due to a weather change, had 
nothing on the front, and sat up as I crested a hill and glided no handed. 
Got a wiggle-wiggle-wiggle and shifted forward slightly, at which point it 
stopped. I never managed to reproduce it with more mindful loading.

Ride buddy JimG had a long struggle with his Kogswell on this topic - he 
had documented it well, which ought to be searchable through his site - 
http://yojimg.net/bike/  

Jim / cyclofiend

On Thursday, March 26, 2020 at 4:46:49 AM UTC-7, Peter White wrote:
>
> I've never found that wheel alignment, which is actually frame alignment, 
> has any effect on wobble. If the frame is out of alignment the two wheels 
> will not follow the same line when the bike is moving in a straight line. 
> For example, if the rear wheel is tracking to the right of the front wheel 
> when moving in a straight line, the bike will tend to turn towards the 
> right. This is easiest to feel when riding no hands. But this won't cause 
> the bike to wobble.
>
> Peter White
>
> On Wed, Mar 25, 2020 at 9:48 PM Fryett  wrote:
>
>> Are you wheels perfectly aligned within the frame?
>>
>> On Monday, March 23, 2020 at 7:01:24 PM UTC-7, Friend wrote:
>>>
>>> Does anyone have suggestions for correcting a wobble I get when I ride 
>>> with no hands?
>>>
>> -- 
>>
> -- 
> Peter White
>

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Re: [RBW] Re: Speed wobble

[Peter White]

I've never found that wheel alignment, which is actually frame alignment,
has any effect on wobble. If the frame is out of alignment the two wheels
will not follow the same line when the bike is moving in a straight line.
For example, if the rear wheel is tracking to the right of the front wheel
when moving in a straight line, the bike will tend to turn towards the
right. This is easiest to feel when riding no hands. But this won't cause
the bike to wobble.

Peter White

On Wed, Mar 25, 2020 at 9:48 PM Fryett  wrote:

> Are you wheels perfectly aligned within the frame?
>
> On Monday, March 23, 2020 at 7:01:24 PM UTC-7, Friend wrote:
>>
>> Does anyone have suggestions for correcting a wobble I get when I ride
>> with no hands?
>>
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> 
> .
>


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Re: [RBW] Re: Speed wobble

[James Copp]

That's a great question.  I'll make sure that they are.

On Wed, Mar 25, 2020 at 9:48 PM Fryett  wrote:

> Are you wheels perfectly aligned within the frame?
>
> On Monday, March 23, 2020 at 7:01:24 PM UTC-7, Friend wrote:
>>
>> Does anyone have suggestions for correcting a wobble I get when I ride
>> with no hands?
>>
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Re: [RBW] Re: Speed Wobble on Big Rivs?

[Patrick Moore]

I'm not especially big (frames ~58 c-c), but 3 of my Rivendells have
shimmied at 15-20 mph speeds and it was not due to headset wear. (I've
never felt shimmy at any other orientation than straight ahead.)

IME, shimmy comes and goes with very odd and very slight changes. None of
these 3 Rivs shimmied throughout their history; for example, the '03 didn't
shimmy with 559X23 mm Turbos or Avocet whatevers, but it does with Kojaks.
Similarly for the others.

Shimmy doesn't really annoy me since I very rarely care to ride no handed.

On Mon, Nov 24, 2014 at 4:12 PM, Chris in Redding, Ca. 
campredd...@gmail.com wrote:

 Hey All,
 Bigger folks who only get a wobble at speed and going straight might
 consider that there is some wear in the HS at that orientation.

 All the best,
 Chris
 Redding, Ca.

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