35mm Carbon Bar Flex

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skypig
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skypig
Edited Date/Time 4/7/2020 5:12pm
My latest bike came with 35mm Truvativ Descendant 20mm riser bars.
They seem to have similar flex characteristics to that of an Anvil.

The new model - 25mm risers- advertise “fine tuned carbon laminate... more flex and feel”
One Up have an oval shape for more “vertical compliance” - makes sense, but I’m easily fooled.

Anyone have any experience?
A difference you can notice? Or Marketing hype?
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bturman
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bturman 4/7/2020 11:56am
4/7/2020 11:56am Edited Date/Time 4/7/2020 11:57am
The OneUp bar works quite well.

Here's a review and a flex test from Vital:




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pdon
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pdon 4/7/2020 12:40pm
4/7/2020 12:40pm
I kind of go back and forth on this.

I have had a few sets of RF Next and Chromag bars that I thought felt fine.
Then, I got some of those Truvativ Descendant bars and cut them down to about 770mm and personally found they were a little harsh. I ride a lot of long, fast, and chattery downhills (Tahoe, Downieville) and I noticed a lot of hand and arm fatigue. Obviously, there are a number of factors, but I am pretty good about fork setup and tire pressure. The strange thing is that I noticed this on trails I have ridden many, may times.

For my next bike, I think I will go back to metal. I'm happy to give up some weight for additional comfort and compliance.
Big Bird
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Big Bird 4/7/2020 1:54pm
4/7/2020 1:54pm
I've been seeing adds for Tag Metals Ti alloy bars on Vital. I'm sure they're expensive, but most likely well worth the price for the comfort.
EBlackwell 4/7/2020 2:17pm
4/7/2020 2:17pm
I have a set of One Up bars (35mm/780mm wide) and I definitely did notice the extra compliance when I first mounted them. I went from a 35mm/780mm RaceFace Affect aluminum bar and right away I could feel a difference. I was a bit surprised, as I expected to feel less chatter and high frequency vibrations from the trail, but what I primarily noticed was a reduction in the harshness or jarring sensations coming from front-end compression and g-out forces (e.g. drop to flat, jumping into a berm, etc.). I would liken the feeling to having a fork service or 5mm more travel. Whether this reduces arm pump and fatigue significantly is pretty hard to say for certain, but I certainly found there to be a noticeable 'feel' difference in how the OneUp bars 'took the edge off' of bigger hits.
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jabber127
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jabber127 4/7/2020 2:50pm
4/7/2020 2:50pm
Another vote for the One Up bars here. They're the real deal.
skypig
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skypig 4/9/2020 5:06pm
4/9/2020 5:06pm
Thanks guys. I really appreciate the info and feedback.

Just ordered a set of One Up bars.
Again, their communication and service have been excellent.
(They sorted out a “free shipping” glitch for me.)
Randomscruff 4/9/2020 6:07pm
4/9/2020 6:07pm
Got a new bike with the Truvativ Descendant bar and immediately suffered from a lot of hand pain. Swapped to a Oneup 20mm rise and it alleviated a lot, but not all, of the pain.
skypig
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skypig 4/19/2020 3:34pm
4/19/2020 3:34pm
While waiting on my One Up bars to arrive, I had my forks “serviced”.

The local experts, NSD Dynamics (Brisbane, Australia) offer a “Hyperformance” service.
Low friction seals, “better oil”, and bushes “resized”, etc.

A significant improvement. The bike feels less “harsh”. The Bars don’t feel as bad.
2
Big Bird
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Big Bird 4/19/2020 3:41pm
4/19/2020 3:41pm
skypig wrote:
While waiting on my One Up bars to arrive, I had my forks “serviced”. The local experts, NSD Dynamics (Brisbane, Australia) offer a “Hyperformance” service. Low...
While waiting on my One Up bars to arrive, I had my forks “serviced”.

The local experts, NSD Dynamics (Brisbane, Australia) offer a “Hyperformance” service.
Low friction seals, “better oil”, and bushes “resized”, etc.

A significant improvement. The bike feels less “harsh”. The Bars don’t feel as bad.
Don't blame the messenger they say.
skypig
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skypig 4/19/2020 4:08pm
4/19/2020 4:08pm
Big Bird wrote:
Don't blame the messenger they say.
Ha!
Classic - Bars “I’m just telling you - these forks are HARSH!”

Also, don’t want to “disguise” an issue elsewhere.

My old wrists should be happier with plusher forks, and some assistance from the bars when they arrive.
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