Re: [RBW] Re: Issues with slipping bosco bars?

2019-10-17 Thread A. Nostuh
My aluminum 58cm boscos flex like crazy. They are super light and thin walled 
tubing. The flex is so much I wonder if they would break but probably just in 
my head. There is extra comfort from the flex a bit like doing push-ups on a 
diving board instead of concrete 

Al in Saratoga 

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Re: [RBW] Re: Issues with slipping bosco bars?

2019-10-16 Thread iamkeith
7:54 am 10/15/19 
With my first-run aluminum boscos, I was eventually able to tighten them enough 
to quit slipping, but I still didn't like how much they flexed/twisted. So I 
ended up with the steel bullmoose version which are perfect in every way.  If I 
ever try the aluminum ones again, I'll use the nito v4 srem, which might well 
solve BOTH problems.  Seems like this would be a fix for any that have been 
over-tightened and ovalized, too.  But that'll have to be a bike with a 
threadless steerer.  I think Soma, blue lug and ben's all sell them:


https://www.somafabshop.com/shop/product/nitto-stem-v4-2423?category=153

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[RBW] Re: Issues with slipping bosco bars?

2019-10-16 Thread Eric Grim
I was test fitting Nitto RM016N "Mustache" handlebars to a Nitto "Dirt 
Drop" stem, and doing so marred the handlebar's clamp area because the stem 
was just a little too small for a slip fit.  Not much, just a tiny bit, but 
I thought, "Wait, What?!"

Both the bars and stem were prominently marked 26mm and the bars measured 
1.024-inches (26mm=1.0236 inches, a nominal 4 ten-thousandths less than my 
bars measured).

Oh well, even Nitto has manufacturing tolerances, or they wouldn't also 
sell stem spreaders.  On the other hand, I need to check out the carbon 
fiber friction paste others have mentioned, because I have another bar-stem 
set that slip a little, even though again the numbers match and they should 
mate.

Trouble with the integrated bar-stem system is that I like to fine-tune the 
tilt of the bars to suit my (no longer mint condition) wrists.

Eric, Spokane

P.S. Mandatory Rivendell content: these were all for my Appaloosa.


On Saturday, October 12, 2019 at 12:37:06 PM UTC-7, jeff perry wrote:
>
> Is anyone else experiencing slipping Bosco bars? . . . [snip]  Anyone else 
> experiencing similar problems?

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Re: [RBW] Re: Issues with slipping bosco bars?

2019-10-16 Thread jeff perry
Agreed 100%

Sent from my iPhone

> On Oct 16, 2019, at 12:13 AM, Joe Bernard  wrote:
> 
> Everything you've described - most of which include a different stem and/or 
> bar design - are intended to combat the physics I'm talking about. My claim 
> stands: I think some people are putting more leverage into the Tallux/Bosco 
> combination than it can withstand without extra remedies at the clamp area. I 
> also think some get lucky with the specific tolerances of their bar/stem and 
> never have a slip. 
> 
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[RBW] Re: Issues with slipping bosco bars?

2019-10-15 Thread Clayton.sf
Yes, I can dig it.

Clayton Scott
HBG, CA

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[RBW] Re: Issues with slipping bosco bars?

2019-10-15 Thread Joe Bernard
Everything you've described - most of which include a different stem and/or bar 
design - are intended to combat the physics I'm talking about. My claim stands: 
I think some people are putting more leverage into the Tallux/Bosco combination 
than it can withstand without extra remedies at the clamp area. I also think 
some get lucky with the specific tolerances of their bar/stem and never have a 
slip. 

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[RBW] Re: Issues with slipping bosco bars?

2019-10-15 Thread Clayton.sf
I feel like slippage has little to do with bar weight or stem length.
If you want less slip then you need to increase friction between stem and bar. 
A larger diameter bar/stem interface (31.8mm or 35mm) accomplishes this most 
elegantly. Friction paste and torque are other means. More exotic solutions are 
bullmoose style stems (Nitto makes some) that clamp bars in two instead of one 
area. 

Clayton Scott 
HBG, CA

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[RBW] Re: Issues with slipping bosco bars?

2019-10-15 Thread Clayton.sf
@Justin underneath the bar sleeve there are likely two slits/holes. Squirt some 
wd40 or t9 in there and the creaking should stop.

CS HBG CA

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[RBW] Re: Issues with slipping bosco bars?

2019-10-15 Thread Joe Bernard
We may just have to admit that putting light wayback bars on light wayforward 
stems has a practical limit before the laws of physics takes over. Sometimes 
they creak, sometimes we can push on them hard enough to slip. 

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[RBW] Re: Issues with slipping bosco bars?

2019-10-15 Thread Justin, Oakland
My Boscos slipped. Overtorqued but no carbon paste. I took them off and 
replaced them with Chocos.

Which creak.

And drive me nuts. But they are my favorite bar of all time.

On Saturday, October 12, 2019 at 12:37:06 PM UTC-7, jeff perry wrote:
>
> Is anyone else experiencing slipping Bosco bars?  No matter how much I 
> tighten the stem, it slips when I apply even a reasonable amount of 
> pressure on the bars.  There’s no grease in there to screw things up 
> either.  So frustrating because I like the bars, but it’s just not safe to 
> ride this way.  I’ve had zero issues on my albatross bars. Anyone else 
> experiencing similar problems?

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Re: [RBW] Re: Issues with slipping bosco bars?

2019-10-15 Thread Coal Bee Rye Anne
I had some cromo Bosco + Nitto old stock cromo riser stem (CT-## {31 or 51, 
maybe}) slippage.  Not much, but a little upon hard out saddle mashing or 
stopping.  

I may or may not have experienced the same with the stock Tallux on my Clem... 
I can’t recall as I swapped stems fairly quickly as I needed the Tallux long 
quill length for another build and the Cromo riser with short quill was a 
perfect substitute at the time.

I later traded the Cromo Bosco finding the 55cm too narrow for my large 
wingspan (for the bolt upright posture.)

I’ve decided if I try Bosco again I’ll look for the 58cm moose variety, not 
just to avoid slippage but also a preference for the style (and to complete a 
bull moose trio.)

Brian Cole
Lawrenceville NJ

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Re: [RBW] Re: Issues with slipping bosco bars?

2019-10-15 Thread Shawn Granton
Hello all-

Out of curiosity, does the metal make any difference in slipping? If you 
had a slipping set, what was it made out of?

Boscos come both in  heat-treated aluminum and chromoly steel. I put a pair 
of Boscos on my Raleigh Crested Butte four years ago to replace a pair of 
Civia Duponts. The Duponts were similar, but (probably untreated) aluminum 
and had quite a bit of "flex" in the bars. I got the Boscos in steel 
partially because they were cheaper than the aluminum bars, but also 
because I wanted a less "flexy" feeling. Four years later they're still 
working good, and I haven't had any slip.

Best,
Shawn in PDX



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Re: [RBW] Re: Issues with slipping bosco bars?

2019-10-14 Thread Joe Bernard
I think the OP has reached the end of his confidence with these bars and just 
would rather not. Which I totally understand; it's a very important contact 
between you and the very important front wheel, and you need to know that baby 
isn't going to move! 

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Re: [RBW] Re: Issues with slipping bosco bars?

2019-10-14 Thread Bob B
I've ridden these bars for many years. When I first installed them they 
slipped and I found that to fix it I had to tighten the bolt a little bit 
more than I was comfortable with—once I did, they were set and haven't 
moved a smidge since.  

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Re: [RBW] Re: Issues with slipping bosco bars?

2019-10-14 Thread Garth


Without actually measuring anything you have idea what you are working with, 
either bar or stem.


Even if the bar is slightly out of spec, an open face stem is much more 
accomodating, the bars don't have to be exact like a single bolt. I've used 
25.4 swept back bars in 26.0 open face stems w/o a shim and they didn't budge. 
2 and 4 bolt stems usually offer a wider clamp area also. 

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Re: [RBW] Re: Issues with slipping bosco bars?

2019-10-14 Thread Bill Lindsay
>From your description, I think you are right not to use them.  If it were 
me, I would attempt to get my money back from whomever I bought them.  In 
my case, the only entity from whom I would ever buy a Bosco bar would be 
Rivendell Bicycle Works, and I'm certain that they would treat me fairly.  

Bill Lindsay
El Cerrito, CA

On Monday, October 14, 2019 at 2:43:46 PM UTC-7, jeff perry wrote:
>
> Maybe I just got a defective bar.  Disappointing.  I can’t sell these, so 
> I guess they are an expensive addition to my recycle bin.  
>
> Sent from my iPhone
>
>

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Re: [RBW] Re: Issues with slipping bosco bars?

2019-10-14 Thread Clayton.sf
Doubt they are defective. I think it has more to do with how and where a person 
rides. Some friction paste and judicious overtorquing of stem bolt should 
mostly solve it.

CSHBGCA 

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Re: [RBW] Re: Issues with slipping bosco bars?

2019-10-14 Thread jeff perry
Maybe I just got a defective bar.  Disappointing.  I can’t sell these, so I 
guess they are an expensive addition to my recycle bin.  

Sent from my iPhone

> On Oct 14, 2019, at 5:01 PM, Mark Roland  wrote:
> 
> I've got two of the non-bull Boscos in service on my 26" tandem. Doesn't see 
> a ton of miles, but no issues.
> 
>> On Monday, October 14, 2019 at 10:04:43 AM UTC-4, John A. Bennett wrote:
>> I've been riding Bosco bars on my daily commuter (2005 RBW 62cm Saluki) for 
>> years, and I have had zero issues with them. 
>> 
>> No slip, no dip. 
>> 
>> They are by far my favorite bars OF ALL TIME, and believe me, I've ridden 
>> them all. Well, all of the bars sold by Rivendell, that is. 
>> 
>> https://www.instagram.com/p/B1o6mceBEsf/
>> 
>> John at Rivelo in Portland, Ore. 
>> 
>> 
>> 
>> 
>> 
>>> On Saturday, October 12, 2019 at 12:37:06 PM UTC-7, jeff perry wrote:
>>> Is anyone else experiencing slipping Bosco bars?  No matter how much I 
>>> tighten the stem, it slips when I apply even a reasonable amount of 
>>> pressure on the bars.  There’s no grease in there to screw things up 
>>> either.  So frustrating because I like the bars, but it’s just not safe to 
>>> ride this way.  I’ve had zero issues on my albatross bars. Anyone else 
>>> experiencing similar problems?
> 
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[RBW] Re: Issues with slipping bosco bars?

2019-10-14 Thread Mark Roland
I've got two of the non-bull Boscos in service on my 26" tandem. Doesn't 
see a ton of miles, but no issues.

On Monday, October 14, 2019 at 10:04:43 AM UTC-4, John A. Bennett wrote:
>
> I've been riding Bosco bars on my daily commuter (2005 RBW 62cm Saluki) 
> for years, and I have had zero issues with them. 
>
> No slip, no dip. 
>
> They are* by far* my favorite bars OF ALL TIME, and believe me, I've 
> ridden them all. Well, all of the bars sold by Rivendell, that is. 
>
> https://www.instagram.com/p/B1o6mceBEsf/
>
> John at Rivelo in Portland, Ore. 
>
>
>
>
>
> On Saturday, October 12, 2019 at 12:37:06 PM UTC-7, jeff perry wrote:
>>
>> Is anyone else experiencing slipping Bosco bars?  No matter how much I 
>> tighten the stem, it slips when I apply even a reasonable amount of 
>> pressure on the bars.  There’s no grease in there to screw things up 
>> either.  So frustrating because I like the bars, but it’s just not safe to 
>> ride this way.  I’ve had zero issues on my albatross bars. Anyone else 
>> experiencing similar problems?
>
>

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[RBW] Re: Issues with slipping bosco bars?

2019-10-14 Thread Clayton.sf
Go to a   bike shop instead. It is usually sold to install carbon seatposts and 
bars that are sensitive to over torquing. Often they even have some free 
samples in which case you can buy tire lever, cable, or tube.

CSHBGCA 

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[RBW] Re: Issues with slipping bosco bars?

2019-10-14 Thread Marc Irwin
It takes a substantial amount of torque to keep those bars stable.  I was 
one of the first to try them years ago and they called a few weeks later to 
see if they were alright.  I had to use a pipe as an extension on my allen 
wrench to get them tight enough.  They have a freaky long reach back 
creating a lot of leverage.  I wouldn't trade them for any reason.

Marc

On Saturday, October 12, 2019 at 3:37:06 PM UTC-4, jeff perry wrote:
>
> Is anyone else experiencing slipping Bosco bars?  No matter how much I 
> tighten the stem, it slips when I apply even a reasonable amount of 
> pressure on the bars.  There’s no grease in there to screw things up 
> either.  So frustrating because I like the bars, but it’s just not safe to 
> ride this way.  I’ve had zero issues on my albatross bars. Anyone else 
> experiencing similar problems?

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[RBW] Re: Issues with slipping bosco bars?

2019-10-14 Thread John A. Bennett
I've been riding Bosco bars on my daily commuter (2005 RBW 62cm Saluki) for 
years, and I have had zero issues with them. 

No slip, no dip. 

They are* by far* my favorite bars OF ALL TIME, and believe me, I've ridden 
them all. Well, all of the bars sold by Rivendell, that is. 

https://www.instagram.com/p/B1o6mceBEsf/

John at Rivelo in Portland, Ore. 





On Saturday, October 12, 2019 at 12:37:06 PM UTC-7, jeff perry wrote:
>
> Is anyone else experiencing slipping Bosco bars?  No matter how much I 
> tighten the stem, it slips when I apply even a reasonable amount of 
> pressure on the bars.  There’s no grease in there to screw things up 
> either.  So frustrating because I like the bars, but it’s just not safe to 
> ride this way.  I’ve had zero issues on my albatross bars. Anyone else 
> experiencing similar problems?

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Re: [RBW] Re: Issues with slipping bosco bars?

2019-10-14 Thread jeff perry
Sorry to hear that.  I think it’s just poor design, unfortunately.  Too much 
leverage from the long bars and not enough surface area in the clamp.  The 
bosco moose seems like the safest way to go.  I’m sticking with my albatross.  
I was happy with them anyway, just wanted to try something new. 

Sent from my iPhone

> On Oct 14, 2019, at 9:27 AM, dra1980  wrote:
> 
> I just ordered a set of boscos with the re-stock they did at Walnut Creek and 
> am having the same issues. New stem, new bars, correct sizes but same slip as 
> described here. So you aren't alone. Maybe I'll try that friction paste... is 
> that kind of thing available at any hardware store? 
> 
>> On Saturday, October 12, 2019 at 3:37:06 PM UTC-4, jeff perry wrote:
>> Is anyone else experiencing slipping Bosco bars?  No matter how much I 
>> tighten the stem, it slips when I apply even a reasonable amount of pressure 
>> on the bars.  There’s no grease in there to screw things up either.  So 
>> frustrating because I like the bars, but it’s just not safe to ride this 
>> way.  I’ve had zero issues on my albatross bars. Anyone else experiencing 
>> similar problems?
> 
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[RBW] Re: Issues with slipping bosco bars?

2019-10-14 Thread dra1980
I just ordered a set of boscos with the re-stock they did at Walnut Creek 
and am having the same issues. New stem, new bars, correct sizes but same 
slip as described here. So you aren't alone. Maybe I'll try that friction 
paste... is that kind of thing available at any hardware store? 

On Saturday, October 12, 2019 at 3:37:06 PM UTC-4, jeff perry wrote:
>
> Is anyone else experiencing slipping Bosco bars?  No matter how much I 
> tighten the stem, it slips when I apply even a reasonable amount of 
> pressure on the bars.  There’s no grease in there to screw things up 
> either.  So frustrating because I like the bars, but it’s just not safe to 
> ride this way.  I’ve had zero issues on my albatross bars. Anyone else 
> experiencing similar problems?

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[RBW] Re: Issues with slipping bosco bars?

2019-10-13 Thread brendonoid

I had the same problem. Discovered that the bars had slightly deformed at 
the clamp area and therefore lost the strength of being a tube. 
I could tighten the stem all day but the bar would simply compress and slip 
with moderate force. Had to throw the bars away. They weren't safe.

To be fair to Grant and Nitto I'm fairly certain that original damage 
occurred from a poorly fitted shim in a 26 stem. However the shim was only 
poorly fitted because the bars had slipped at some point.
>From an engineering perspective the Bosco is pretty huge lever exerting a 
lot of force on that clamp area. But I'm not an engineer or particularly 
good at math so my opinion here is merely opinion.

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[RBW] Re: Issues with slipping bosco bars?

2019-10-12 Thread Garth

I prefer 2 and 4 bolt open face stems myself, or at least a steel single 
bolt one. I've never had any of those slip. 


On Saturday, October 12, 2019 at 3:53:47 PM UTC-4, Clayton.sf wrote:
>
> One of the main reasons 31.8makes more sense. Slips substantially less.
>
> Clayton Scott
> HBG, CA
>

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[RBW] Re: Issues with slipping bosco bars?

2019-10-12 Thread Garth

https://groups.google.com/forum/#!searchin/rbw-owners-bunch/bar$20slip|sort:date/rbw-owners-bunch/-0wcciQEqq0/gzdmgfBvDAAJ

This is applicable. Seems like sufficient torque(with torque wrench of some 
sort) and/or blue loctite on the bolt threads. Carbon fiber friction paste 
also. Do measure both the bar and the stem, don't take it for granted they 
are what they say. 


On Saturday, October 12, 2019 at 3:37:06 PM UTC-4, jeff perry wrote:
>
> Is anyone else experiencing slipping Bosco bars?  No matter how much I 
> tighten the stem, it slips when I apply even a reasonable amount of 
> pressure on the bars.  There’s no grease in there to screw things up 
> either.  So frustrating because I like the bars, but it’s just not safe to 
> ride this way.  I’ve had zero issues on my albatross bars. Anyone else 
> experiencing similar problems?

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