both of my cracking synergies are o/c, but one is 36 hole (lesnik built)
and the other is 32 (lbs built). i should mention that while the 32 has
seen less use, the cracking is also not quite as extensive. also, the
fronts are just fine and the rears are cracking around the drive-side
eyelets
my cracking synergies are both o/c, but one is 36 hole (lesnik built) and
the other is 32 (LBS built). i should say the 32 has seen much less use,
though the cracking is not quite as extensive. also, the front synergies
are just fine.
On Sunday, December 9, 2012 12:20:45 PM UTC-6, Earl Grey
unfortunately, lesnik's assessment just doesn't match my experience. and
for those who haven't already seen this, mike kone of boulder/rene herse
bicycles attributes the problem to spoke tension, while in the comments
velocity (or someone claiming to represent velocity) attributes the problem
Moving is no solution unless the root of the issue has been resolved.
New machining, better labor skill set, better raw materials can all make a
big difference.
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This Velocity cracking problem is almost exclusively an issue with the Synergy
OC model, but Velocity claims to have beefed up the extrusion to fix the
problem (I believe them, but time will tell). I have observed the same problem
with various Mavic rims. I have observed the same problem with
Jim:
What you say makes a lot of sense in light of my good luck with Velocities.
My Synergies are on a Tom Kellogg / Spectrum Cycles 30th Anniversary bike
with classic Italian race geometry. I am middle of the pack weight wise
(maybe the lower end these days) and do not carry loads on the
I seem to remember from past threads that it was particularly the 36 hole
O/C Synergies that were cracking. If you have cracked a Synergy, can you
state whether it was O/C and 36 hole?
I have two 32 hole O/C Synergies on two bikes, with one around 4000 mi/3
yrs, the other maybe 1500mi/2 yrs,
I have an O/C 36 hole Synergy that has a few cracks. I still ride it and it
has at least 6000 miles. The matching front Synergy has no such issues.
Wheels are Lesnick built with XT hubs purchased in '09. It is on my replace
list, but I have been building my own lately. I will replace with
My LBS mechanic said he doesn't think cracks are just specific
to Velocity/Synergy. He says he has seen cracks elsewhere, including his
Mavic rim that cracked when he went to true it up.
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On Sunday, December 9, 2012 2:45:59 PM UTC-8, Michael wrote:
My LBS mechanic said he doesn't think cracks are just specific
to Velocity/Synergy. He says he has seen cracks elsewhere, including his
Mavic rim that cracked when he went to true it up.
Rims cracking at the spoke hole have
I've always used Mavic rims .. namely the A719/T520 ones. While Velocity
clearly stands up for their product if it fails it appears *to fail *at
a higher than average rate for many. I'd rather have a rim that did not
fail under normal use, period, even if heavier or more $$. Mavic
While Velocity clearly stands up for their product if it fails it
appears *to fail *at a higher than average rate for many. I'd rather
have a rim that did
not fail under normal use, period, even if heavier or more $$. Mavic
rims do cost more upfront and this factors into some people's
Has anybody asked Rick Lesnik, who works extensively with Synergies, about his
observations on this?
On Dec 8, 2012, at 8:31 AM, Matthew J wrote:
While Velocity clearly stands up for their product if it fails it
appears to fail at a higher than average rate for many. I'd rather
I've seen reports of a variety of their rims cracking... Google it up :)
Synergy is just used by many people here ... which is very small slice of
the whole.
But really ... I could on forever with reasons and causes and there is
no end other than ultimately ... *we all get back what
Actually, I did ask Rich about it.
The cracking problem with the Synergy is with the O/C rim, when a too-heavy
rider puts skinny high-pressure tires on, or fat tires pumped way up. If
you are worried, then I'd switch to the Synergy non-O/C in the rear as well --
a bit stronger rim.
That
Synergies are of course discussed here because RIv sells them, but this is
a very small slice of cyclists in whole. Do a search for Velocity rim
cracks and you'll see there is a broad range of models with the issue.
Moving is no solution unless the root of the issue has been resolved.
I thought it was pretty clear to be predominantly a batch of O/C Synergies,
some Chukkers too it seems... And Velocity not only is easily swapping rims,
but have made production changes to address...
I'm curious to see if the problem continues, or if it is solved...
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the frequency of cracking reported on this thread suggests a systematic
problem. This is what I get paid for. Again, this is fatigue cracking and
denotes the stress where the crack starts is very close to (or above) the
stress required to permanently stretch the metal (defined as the yield
I have become a big fan of Rigida rims, especially the Sputnik (which is
what I have on my Bomba)... but they're difficult to get in the US.
I tend to treat my wheels kinda like I do shoes; as consumables... I'm
tough on both, and so I've never been able to rationalize in my own head
the
i just wanted to provide another account of someone who's been frustrated
with rear o/c velocity synrergy cracking around the drive-side eyelets. two
wheels professionally built less than two years ago by two different
builders (one by lesnik and the other by an experienced builder here in
Timely subject-- am increasingly convinced that most of these Velocity rims
are just not made for heavy loads and wide tires. Yesterday I found that
both rims on my 650B tandem were splitting in
halfhttp://www.pardo.net/bike/pic/fail-001/FAIL-125.htmlunder the rim tape,
probably because we
I had over 11,000 km on a Velocity Dyad 700c, on a bike tour, so heavily
loaded all the way (the rim already had about 4000km of unloaded riding on
it before the tour). While touring, I broke some spokes - I hit a pothole
too hard - and was never able to gt the wheel to hold true for that long
I've had the opposite experience with synergies and now dyad rims.I put
at least 15K on a set of synergies in all seasons including lots fully
loaded, and the very snowy and salty new england winter of 2010/11, and
only had to replace them because the sidewalls/braking surface had worn way
Mavics are excellent, and if you look around you can still find NOS Rigida.
I have a set of 30-y-o Rigidas on Zeus GS hubs that have probably 30K on
them and have been trued twice in that time, and over a gillion potholes.
The hubs are oxidized around the spokes, but the wheels are so strong
Velocity was having trouble keeping quality consistent in Australia but
have since moved production to the United States. Believe the U.S. made
versions will be hitting the stores next year.
Apparently I have been real lucky as the three Velocity rim wheelsets I
have, one made by Peter
Not a jerk question but what is the lifespan of a set of rims, on average?
On Thu, Dec 6, 2012 at 3:53 AM, Matt Beebe matthiasbe...@gmail.com wrote:
I've had the opposite experience with synergies and now dyad rims.I
put at least 15K on a set of synergies in all seasons including lots
I'm a metallurgist and licensed professional engineer. If you make
something monolithic, it doesn't have a life span. If it's not monolithic,
it fatigues at something below 10 million load cycles (if it exceeds 10
million load cycles, it's assumed to be monolithic). On a rolling wheel,
oops, didn't convert inches to feet - they have 200 million cycles on them
On Thursday, December 6, 2012 9:11:51 AM UTC-6, Ron Mc wrote:
I'm a metallurgist and licensed professional engineer. If you make
something monolithic, it doesn't have a life span. If it's not monolithic,
it
sorry, got it right this time, there 21 million revolutions on my Rigida
rims.
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If you ride in the grime and rain, a common reality if you commute by bike,
your brake pads will eventually eat through the rim sidewalls.Even if
you only ride in dry conditions, dirt will get in there, between the pads
and the rim, unless you are riding in a clean room.
On Thursday,
I had a Synergy rim do exactly the same thing. In addition, both rims were
slightly undersized, so wire bead tires (all brands) wouldn't stay on. I
could only get folding tires to stay on the rims.
Synergy offered to replace them (for the size problem), but I haven't
gotten around to sending
OK Matt, that counts as weathering - in this case it's mechanically
assisted weathering - and it has nothing whatsoever to do with the cracks
they are discussing on this thread.
On Thursday, December 6, 2012 10:38:19 AM UTC-6, Matt Beebe wrote:
If you ride in the grime and rain, a common
We've replaced (through Velocity warranty) a large number of cracked
Synergy rims. I think Grant likes them because they're classic eyeletted
box style and they are one of the only mainstream options in 650B with a
brake surface. Velocity told me the more recent production Synergy rims
have a
I love my Velocity Rims, but:
My Synergy, machined, 32 hole - the rim joint makes noise when brakes are
applied (brand new rim, too.).
My Twin Hollow, non-machined, 32 hole - the rim joint makes noise when
brakes are applied (older).
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