Grumpier Mike, If you favor a “Narrow is Aero” arm rest position we got you covered….and more importantly no adapter plates are needed! The Metron aerobar arm rest plates are a Asymmetric flip-flop design which can be orientated in 4 different positions to meet a wide range in width and reach. Though the minimum width called out in the spec is 111mm Center to Center (210mm Outside to outside), it is possible for the user to go to an absolute minimum arm rest measurement as low as 96mm Center to Center (195mm outside to outside). In this narrow position there is literally a 2mm of overlap with the arm rest plates but since the plates are composite, the small amount of flex they have at the ends will compress together and work.
For those curious about widths on the other end of the spectrum, the width positions step outward every 15mm to the max which is 261mm Center to center (360 outside to outside).
Please see attached diagrams below.

[quote]Does ist have a hole/stop for a center-pull brake (aka TriRig)?[/quote]

It doesn't really matter. The TriRig brake is at most 1w faster vs Vision's brake in the wind tunnel testing I did head to head at 0, -5, -7.5 & -10 yaw.

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Brian Stover USAT LII
Accelerate3 Coaching
Insta

Hey Vision-USA

I'd love to get my hands on a set to test in the tunnel/and or field test if you're interested.

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Brian Stover USAT LII
Accelerate3 Coaching
Insta

Any idea if the new bar/stem would work on a Fuji Norcom Straight (with the stem "slammed", of course)?

TIA!

I'd like a free set for field testing too :)

what would be the equivalent standard stem length and angle for the this system? i see that the min stack for the system is 55mm but it's hard to figure out the overall fit without knowing the stem specitics. thanks

[quote]I'd like a free set for field testing too :) [/quote]

Get in line buddy, get in line ;-) !

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Brian Stover USAT LII
Accelerate3 Coaching
Insta

Hi Andrew, Thanks for the interest in the Metron aerobar.
Short answer is: Yes, the Metron aerobar will fit your Fuji Norcom Straight.

Now for the long answer…

Head tube clearance:
In the “Slammed” position the issue is clearance from a bulging head tube. The Fuji head tube does not have this problem because the head tube steps 5mm below the headset interface.
Whereas the underside of the Metron Stem/aerobar is pretty close to horizontal (+0.3mm) from the headset interface.
(So even if you removed the headset top cap, and positioned the stem down on the compression ring in the bearing, you would still have enough clearance for the Metron)


Top Tube Recess/ Rear Stem Clearance:
Knowing the stem interface on a TT bikes was going to be tight with different top tube recess diameters, we did our best to snug the rear portion of the Metron stem as close to the steer tube as possible.
On the Norcom Straight, the top tube recess at the stem has a ф52mm dia. which = a 11.7mm clearance from the steer tube.
For the Metron stem, it has a Apex width of 10.4mm from the steer tube which= 1.8mm clearance from fillet.
So though it will be visually tight, the clearance is there so you are good to go.

See diagrams attached below. Cheers!.

Hi Jazzymusicman, the Metron Aerobar Stem length is 90mm and the angle is a (-) 17.5deg.
If you are looking for more details, please see our reply to Andrew Coggan and the illustrations provided.
Happy riding!

Thank you very much for your answer, especially the dimensional details. Your new bar would seem like an excellent choice to replace the Oval stem and bar that come with the Norcom Straight, which really hold back an otherwise very good bike.

Hi Vision,

Glad to see you on Slowtwitch. Can you comment on how the bar would fit an Orbea Ordu OMP model? Are there cable exit holes at the top of the stem (instead of back)?

Hi Vision USA,
Question for you... You indicated this in an earlier response, " For the 2019 line-up, Vision has updated the 3-spoke wheel for improved aerodynamics, as well as offering a clincher and tubular disc brake option."
Can you please elaborate on the aero differences from 2017 to 2019? Also, what will the width be for 2019?
Thanks,

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Team Zoot-Texas, and Pickle Juice

More of a reply to Vision, I'm also curious about the width.

Bloodyshogun, pleasure is ours. Our cable exits come out the back of the stem. The rear brake cable could be tight due to the routing on the top tube, but the shift cables and front brake cable path should have no issues. Please see attached photo for a better visual.

They needed a torx bit to get them to adjust. Much easier than Allen key.

Not 100% sure, but Ordu models for 2019 seem to be using this aerobar. The rear brake cable is routed under the bar and not through the stem: https://www.orbea.com/...les/ordu-m10-team-19.

Stem cabling is understood, but how do you route the front-brake cable? Not through the stem but through the basebar I suppose?! Could you please clarify?

One suggestion about the little bridge: you might consider designing a second version that extends to the front and has mounting options for BTA, headunits etc. Or maybe design a T-shaped part that can be clipped on the bridge and extensions.

Hi TAUGEN,
The 2017 Vision 3-SPK (let’s call “V1”) was developed for a world tour TT specialist back in 2010. It is optimized for a rider who can maintain a higher average speed (27mph/43.5kph + ), AND/OR a Track athlete who rides in an environment that stays within a shallower YAW angle. (0-7.5deg)

Though the V1 3-SPK has had plenty of success and aerodynamics are great for its intended purpose, it is not an ideal wheel choice for the athletes who cannot maintain a higher speed and OR handling skills are not up to par when the wind kicked up due to the increased surface area.

Other tangible limits with the V1 3-SPK design can be;
- Weight= 894gr front tubular.
- Aerodynamically ideal for a 19-23mm tire with rim dimension= 60mmH x 23mmW.
- Tubular only- no clincher

Also, (not that this matters for Tri but interesting tid-bit nonetheless), a UK TT rule was implemented over the years that affected the use of the V1 in competition. (https://www.cyclingtimetrials.org.uk/articles/view/11 article 14-g) Those larger spoke blades and rim depth take up some real estate and with that the V1 is not legal to use in UK TT’s. So improving on the V1, the 2019 3-SPK ( let’s call “V2”) was to stick to the ethos of being a specialty wheel but be more versatile in purpose and function. The primary improvements that V2 has over the V1 is; improved handling in crosswinds, reduced drag in a wider range of YAW angles and lower weight to make a possible option for hilly TT’s.

For instance:
- Reduced Side load and steer torque input;
Compared to the V1, The V2 had a reduction in Side Force by 11% (avg) and a reduction in the steer torque input by 29% (avg).
The Side Force reduction is primarily from the spoke chord length and rim height being shortened but the improvement in steer torque is a direct result from the rim which is derived from our Metron 55.

- Less drag in wider range of YAW;
Reducing the drag on the V2 3SPK was a secondary objective but did manage to drop few watts and widened the ideal YAW range in the process.
The end result was the V2 tubular averaged (-) 2W less in drag from 0-15deg than the V1 tubular.
Since there is no V1 3-SPK clincher, the comparison in drag improvement is a bit apples to oranges (due to tires/rim interface), but the V2 Clincher averaged (-) 7W less drag than the V1 Tubular from 0-15deg YAW.



- Reduced weight;
V2 3-SPK Front tubular=now 720gr, 830gr clincher. (current in hand weight)

- Clincher-Tubeless ready;
18mm hook width

To Note: The rim width measurements on the V2 3-SPK are 55H x 26.5W (tubular) 55H x 26.75W (clincher) which is optimized for a using a 23-25mm tire.
A 23-25mm tire ends up around 24-27.5mm tire widths (depending on brand and model) when installed on the 18mm hook.
Also, …with the spokes and rim using up less internal real estate the 2019 3-SPk is fully legal for the UK TT’s.
As the 2019 gets closer and the 3-SPKs are ready to deliver we plan to release more data….until then stay tuned!

Vision-USA,
Thank you for the detailed explanation. Exactly what I wanted to know. I will wait for the 2019 wheels to come out.
Can you tell me what model or year this wheel is??

https://goo.gl/images/TexdeZ

Thank you.

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Team Zoot-Texas, and Pickle Juice

I'm not looking to field test the bars, but I would like the most cost effective option to get a set onto my fit bike. These look really sweet!

I already have access to dealer cost, so if that is the suggested route, let me know. I am however, not a dealer, and it seems on the fit bikes of competent fitters would be a GREAT location for some demo models.

Taugen, The above link is a counterfeited wheel. While imitation is flattery, this is a very unsafe channel to resource high end components. We always recommend that you shop at authorized retailers. Please think locally when resourcing your product too, there are many helpful and knowledgeable retailers out there. Please shop responsibly!

Vision-USA,

I had a feeling that wheel was not genuine. Fear not, as I do not own that wheel. I merely found a picture of it when searching various tri-spoke wheels.

Thanks,

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Team Zoot-Texas, and Pickle Juice

Facepalm.

Could you please tell us where the front-brake cable exits?

Do you consider offering a BTA-Bridge option?

Blabelzabel,

You can view the cable routing from the diagram given to Bloodyshogun on July 30th.

There are two options for cable routing for the front brake:

1. Out the back of the stem
2. A port under the base bar/stem junction.

As for the BTA bridge, we have been working on creating an elegant solution for an aftermarket option. More to come on that at a later date.