If even backpedaling legs can create wobble, then shouldn’t the questions be,
is the system stuff enough, and why are we then concerned with a little wobble?
I know the answer to the former question is yes, at least for my relatively
meager output. Nevertheless, I’ve never found my backpedaling
Not sure that legs make up most of the weight in the bottom half of *my* body
...
--Eric Norris
campyonly...@me.com
@CampyOnlyguy (Twitter/Instagram)
> On Sep 27, 2018, at 11:53 AM, Jan Heine wrote:
>
> On Thursday, September 27, 2018 at 11:36:14 AM UTC-7, Bill Lindsay wrote:
> My legs aren’t
On Thursday, September 27, 2018 at 11:36:14 AM UTC-7, Bill Lindsay wrote:
>
> My legs aren’t heavy! Your legs are heavy! Harrumph
[image: ] I should have said 'our legs.' [image: ]
Muscles aren't light! A cyclist's weight is mostly in the lower half of the
body, whereas a swimmer's is in
My legs aren’t heavy! Your legs are heavy! Harrumph
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Shots fired by Jan at Bill’s legs. “Very heavy” indeed!
-J
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Even pedaling backwards while riding, you flex the BB. Your legs are quite
heavy, and their weight alone will flex the BB!
The amount of flex even in a relatively stiff frame is surprising. When we
spent two days in the University of Washington wind tunnel for the big
aerodynamics study in
One important point from Jan’s comments that I suspect may be overlooked by
some is that you should judge chainring wobble or run out on the workstand. If
you are riding the bike, look for it pedaling backwards. When you are actually
riding the bike, pedaling forward, everything flexes and you
Reading along with the thread I was recalling the differing degrees of
finish I've seen on the four faces of a single square taper BB spindle and
suspected that variance of tool marks on the facets of the right side
tapers could produce the response to the crank bolt force resulting in
Been reading the posts about crank wobble with interest. It's something
we've spent a lot of time thinking about. For our Rene Herse cranks, we
went beyond what is standard in the industry to ensure they run true: The
cranks are machined in special custom-made fixtures (one for each crank
Here is another suggestion, and I know nothing about aluminum chainring
manufacture/interface:
Could it be that the very small BCD the rings have makes the rings, in
effect, "longer" than most rings as they proceed outward from the center,
making them more prone to flex/warp if a chainring
I've been following this thread and I'm surprised that we haven't heard
from Jan himself. I can share my experience and what I learned going
through it. When I first got my Rene Herse crankset and SKF bottom bracket
three years ago, I had a similar experience where the crank was wobbling
and I
Do other brand crank sets wobble on that frame too?
On 09/25/2018 01:02 AM, Colin Macdonald wrote:
Hey can you give us an update? I just installed a Rene Herse crankset
and also discovered a wobble. I tightened chainring bolts and
remounted it, I swapped out the BB, still have a wobble.
Hey can you give us an update? I just installed a Rene Herse crankset and
also discovered a wobble. I tightened chainring bolts and remounted it, I
swapped out the BB, still have a wobble. Told Compass about it, they sent
me a new crank arm, it also has a wobble. In my case I would say
Just as an FYI response to the Sugino OX suggestions that have been
floated, here... I have used that very crank, before (it's what I had on my
old Sam), and can speak for its quality. As far as I know, however, there
are (frustratingly) only a handful of chainring combinations with which you
I had to go wider on the BB spindle than what you might need on a non-Riv.
I had nothing but chain rub on the front derailleur body either. A wider
BB allowed me to raise the FD up the seat tube where the chain could run in
the widest part of the FD body while still preventing the outer FD
Reed-
Pretty sure it’s wide n heavy. You’re more of a Sugino OX guy.
-J
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>
> *"Did you grease the spindles?"*
Start thread drift on this count; three, two, one.
Andy Cheatham
Pittsburgh
On Thursday, September 13, 2018 at 4:20:30 PM UTC-4, Benz, Sunnyvale, CA
wrote:
>
> Did you grease the spindles?
>
> *ducking and running*
>
--
You received this message
Or that Sugino OX one: https://www.suginoltd.co.jp/us/products/road/ox.html.
KJ
On Thursday, September 13, 2018 at 4:37:37 PM UTC-7, Michael Doleman wrote:
>
>
> https://store.interlocracing.com/loacr.html
>
>
> On Thursday, September 13, 2018 at 4:27:14 PM UTC-7, Reed Kennedy wrote:
>>
>>
Interesting, thanks Michael.
Anyone know the Q factor measurement of the aforelinked IRD Lobo Adventure
crankset?
Best,
Reed
On Thu, Sep 13, 2018 at 4:37 PM Michael Doleman
wrote:
>
> https://store.interlocracing.com/loacr.html
>
>
> On Thursday, September 13, 2018 at 4:27:14 PM UTC-7, Reed
https://store.interlocracing.com/loacr.html
On Thursday, September 13, 2018 at 4:27:14 PM UTC-7, Reed Kennedy wrote:
>
> Metin,
>
> Understood, but a second (or even sixth) installation surely won't void
> the warranty, will it?
>
> Recommendations for a narrow Q non-square-taper crank that
Metin,
Understood, but a second (or even sixth) installation surely won't void the
warranty, will it?
Recommendations for a narrow Q non-square-taper crank that can be run as a
44/28 double?
Best,
Reed
On Thu, Sep 13, 2018 at 4:17 PM Metin Uz wrote:
> Reed,
>
> Square taper cranks have a
Reed,
Square taper cranks have a limited number of installation cycles before
they will be too deformed, although that number could be fairly large. The
theory is that the each properly torqued installation pushes the crank
taper further into the spindle.
For a travel bike that needs crank
On Thu, Sep 13, 2018 at 1:34 PM Lum Gim Fong wrote:
> I say "if you dare" because a second mounting might void warranty.
>
Why in the world would removing and remounting a crank void the warranty?
These are not single use items.
I must remove my René Herse drive side crank arm every time I
If you dare... remove and degrease and reinstall.
Maybe the arm was put on a little off square the first time, though one
would think that tightening the bolt would pull it up the taper into
square. Just an idea.
I say "if you dare" because a second mounting might void warranty.
I would talk to
:-D
Spindles greased according to instructions, yes -- thank you for covering
all bases, LOL.
On Thursday, September 13, 2018 at 1:20:30 PM UTC-7, Benz, Sunnyvale, CA
wrote:
>
> Did you grease the spindles?
>
> *ducking and running*
>
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Okay that is an interesting telltale, because to my eye it appears that
both rings are wobbling a bit. I will contact Compass. They have been
awesome so far, and suspect they will be with this matter too. :-)
On Thursday, September 13, 2018 at 12:30:15 PM UTC-7, Bill Lindsay wrote:
>
> Contact
Contact Compass and send it back for them to confirm. If you have any
doubt whatsoever, send it back with the BB also. They have a run-out
station mounted to a work bench. If the tiny three bolt spider is 'off'
then the small ring will wobble similarly, but to a lesser degree because
it's
Have gone through this already. Did a test ride on which -- indeed -- there
was some loosening, to the point that I needed to shore it up on the ride
itself. After that I removed the crank from the spindle, entirely, and
rotated it one notch forward. From there I used a torque wrench to tighten
My belief is that it's wobble, as it is occurring on the stand. I purchased
the crank brand-new, straight from Compass, yes. It has less than 300 easy
miles on it.
On Thursday, September 13, 2018 at 12:12:46 PM UTC-7, Bill Lindsay wrote:
>
> Is it wobble or is it flex? Compass claims to QC
Follow Compass directions to a T. Ride the first few miles then need to
re-tighten the arms to Compass spec. I've found the drive-side arm would
loosen, until I finally took it to the LBS where they tightened to Compass
spec. It needs to be tightened pretty tight, and if you might need a
Is it wobble or is it flex? Compass claims to QC every one for 'runout'
before shipping. If it is moving 3mm side to side in the workstand,
contact Compass and send it back. My experience with Compass Rene Herse
cranks is they are straight as an arrow. You say 'nearly brand new', does
this
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