FSA Vision Metron road group rear derailleur

Tomorrow’s Giro d’Italia Team Time Trial stage will see something we thought might never actually make it out of vaporware: FSA’s Vision Metron road group!

Shown for a few years now as a “coming soon” and “in testing” collection, it’s seemingly been on the verge of production for quite some time. The Metron group is designed as a TT/Triathlon specific component group using aerobar-specific shifter levers with a click/pull actuation. Those are mated to mostly carbon fiber front and rear derailleurs. Shown at left, the rear derailleur shrouds the chain pulleys in a veil of carbon for smoother air flow.

The most recent version of the Vision Metron crankset gets BB386EVO compatibility, too. The overriding design of all parts is that they’re super aero.

Starting tomorrow morning in Italy, Gustav Larson (Team Vacansoleil-DCM) will be riding them. They’ve also outfitted Team Lampre with a new semi-integrated aero-handlebar. Pics and specs after the break…

The following words and specs are direct from FSA:

REAR DERAILLEUR: Crafted with aluminum and carbon fiber, the Metron rear derailleur sets the standard for time trials and triathlons. An aluminum B-knuckle provides strength, while an engineered plastic P-knuckle, carbon fiber links and inner and outer cages reduce weight and give it an unprecedented aerodynamic advantage. Vision completes the Metron rear derailleur with an 11-tooth upper and an energy-saving 15-tooth lower composite pulley. The Metron rear derailleur is compatible with Vision Metron and Shimano 10-speed drivetrains and can accept up to a 28-tooth cassette.

  • New Vision Metron 10 Speed system
  • Shifter Compatibility: Vision Metron, Shimano 7800 / 7900
  • Cassette Compatibility: Vision Metron, Shimano, SRAM
  • Short Cage only
  • UD Carbon finish
  • 131 grams

FSA Vision Metron road group front derailleur

FRONT DERAILLEUR: The Vision Metron front derailleur uses Carbon Link Construction and a wide body spacing for quick and responsive shifting. To aid in durability and further increase shifting precision, the Vision Metron front derailleur uses a full aluminum alloy cage with an engineered wear resistant coating. The braze-on style derailleur is designed for use with chainrings up to 56-tooth and a max tooth difference of 16-teeth between the large and small rings.

  • Dual front chainring index shifting
  • Alloy Inner & Outer cage with engineered surface treatment
  • Wide carbon outer link for superior rigidity and light weight
  • All stainless steel hardware
  • 1 Size works with compact, standard and TT drive trains
  • Electroless Nickel Coated, Black Anodized, UD Finish
  • 63 grams

FSA Vision Metron road group crankset

CRANKSET: Hollow carbon molded Metron crankset with the versatile BB386 EVO system

  • Hollow Carbon arms with UD Weave
  • Low Speed extruded AL7050 BB30 spindle
  • Ceramic BB30 bearings
  • Carbon / AL7075 CNC chainrings
  • AL7075 Torx T-30 alloy chainring bolts
  • Available for New 10 speed system
  • Length – L170mm, L172.5mm, L175mm, L177.5mm, L180mm
  • Q-Factor – 145mm
  • BCD – 130mm
  • Chainline – 43.5mm
  • 53/39T, 54/42T, 55/42T
  • UD Carbon finish
  • Carbon / Alloy outer chainring with color logo
  • 730 grams (crankset)

FSA Vision Metron road group cassette

CASSETTE: Designed to work in perfect harmony with the Vision Metron aero shifters and Vision Metron carbon derailleur, the Metron 10-speed cassette uses steel pins to join the cogs into a hollow construction for lightweight and durability. To assure quick and precise shifting, each cog features ramps and shift pins for optimal chain engagement. The Vision Metron 10-speed cassette is compatible with Shimano cassette bodies.

  • 10-speed cassette sprocket
  • Riveted construction is extremely lightweight
  • Heat-Treated carbon steel cogs
  • Large contact area saves alloy freehub bodies
  • 11-21, 11-23, 12-25
  • Electroless Nickel plated cogs
  • Anodized Red Lock Ring, Spider
  • 165 grams

FSA Vision Metron road group aerodynamic bar end brake and shift levers

METRON TT SHIFTER (LEFT): The revolutionary Metron aero shifter features an ergonomic design that sits comfortably in the rider’s hand. With a simple pull of the trigger style lever, the rider is able to up shift up to three cogs at a time. The aerodynamic levers then return to the starting position. This unique design eliminates the need for the rider to move their hands from the extensions, and thus maintain an aero position while shifting. Downshifts are equally simple, using a small button integrated into the lever housing. A simple and intuitive compression of the button results in seamless down shifts. The Vision Metron shifters weight only 192 grams per pair and are also compatible with Shimano drivetrains.

  • New FSA 10 speeds system
  • The Shape design is based on aerodynamics for decreasing wind resistance
  • Aluminum head, lever and body; ABS release button
  • UCI Legal
  • Includes cable set
  • Compatibility with Shimano 10 speeds system (SF-VT-800 Compatibility with Shimano 7800) (SF-VT-820 Compatibility with Shimano 7900)
  • Fits Ø19.4mm ID (inner diameter) round extension bar
  • Speeds: 10 for rear / 2 for front with 1 trim
  • Black anodized
  • 192 grams (pair)

METRON AERO BRAKE LEVER (RIGHT): Designed for single or dual pivot short pull brake calipers, the Metron Aero Brake levers utilize an internally expanding wedge design with full internal cable routing. It features an Ergonomic shaped with a left and right side specific design

  • Utilizes internally expanding wedge design with full internal cable routing
  • Ergonomic lever shape
  • Left and right side specific design
  • Designed for single or dual pivot short pull brake calipers
  • Includes Vision DragOn brake cable set
  • Compatible with Ø24mm OD bars (Si006)
  • UD Carbon finish
  • 45.5 grams

FSA Vision Twin Foil carbon fiber integrated aerobar handlebar

TWIN FOIL AEROBAR: New monocque aerobar in carbon, semi-integrated with adjustable extensions (3 different height of extensions – 25mm / 40mm / 60mm). The new and innovative aerobar is designed for the new Wilier frame: Twin Foil. It is studied for the maximum optimization of aerodynamic and for the limitation of air resistance.

  • Carbon fiber composite CSI extensions bar
  • Internal cable routing with rear exit
  • Armrests adjust to 40mm width range
  • 410mm Base Bar width (C to C)
  • Extensions – 290mm (cut to length)
  • For use Ø31.8mm stem
  • UD Carbon finish
  • 765 g


  1. A 1988 Campagnolo C-Record rear derailleur with ‘aero’ cage called. It said “you’re welcome”.

  2. I’m no Adrian Newey, but it seems the by the time air reaches the rear derailleur its pretty “dirty” as they say and any aero packaging is moot.

  3. Ryan, you sound like a imagine conscious little girl. I bet these components look better than your high school graduation photo. It’s their first try, give them a chance.

  4. Gillis… actually, by reducing how dirty is the air at the exit you can reduce the total aerodynamic drag. Having someone sucking your wheel is actually a little faster than going solo. But I agree with you, it’s not like the derrailleurs will make a big difference. The front one doesn’t look any aerodynamic at all.

  5. @ Nivlac – Yes you are. The shifter is on the left. Pulling the lever pulls cable and depressing the end cap releases cable.

    As for the “aero” part. If SRAM is making aero barrel adjusters, I guess Vision can make Aero derailleur cages.

  6. I played with those shifters on a TT bike in a local shop about 2 weeks ago.
    They work, they work really well, actually.
    I don’t buy/ride TT bikes, but I thought the design and technology was pretty darn cool.

    Now – let’s talk about those cassettes – they are very interesting and lightweight.
    I wonder what they sound like, remember the sram powerdome noise?

  7. @Warp: while I understand that principle as it works in autoracing like Nascar, it was my perception that the relatively low speeds of cycling made it negligible. I can tell you I don’t feel any faster when I’m in front of a paceline.

  8. 1. you can sell a triathlete ANYTHING. fact. 2. from a mechanic’s point of view, anything that acts as a “shroud” or “guard” under the guise of “aero” on a triathlete’s bike is welcomed. If you’ve ever put in time wrenching on a herd of their sleds after an event you’d know how utterly disgusting their bikes are. anything that covers anything that may save actual moving parts that you can hose off is ok. usually.

  9. What a bunch of salty ol’ladies commenting so negatively. Just by looking at a website image people have such closed minded opinions. Will be good to hear how actual testing goes w/ a few real world reviews.

  10. In my shop, F-S-A doesn’t stand for Full Speed Ahead. It means F-in Sucks A.
    Even dealing with their customer service sucks. Well, to be honest…except one time.
    If a stock bike comes with an FSA product on it, we change it out, and sell it for the post shop ride beer fund.

  11. @wannaBeSTi… I call absolute BS on your comment
    …I’m sure your shop will replace any and all FSA components off all the bikes you stock…(so I will assume predominantly cranks, BB’s, bars, stems, posts, the odd saddle, the odd wheelset, the the very occasional fr der…), all the while maintaining MSRP on those bikes, while incuring additional cost …(in time,labor,stock)….sell said components…(obviously at a loss, since the funds only seems to pay for beer…)
    Less time drinking beer, more time taking business classes…and less time posting hyberbole

  12. This is starting to sound like the PinkBike comments in here.
    Don’t you kids have a curfew? (kidding)

    Crack-n-Fail, Diamond-crack, Crapn-nolo, Special-Ed … Dig enough and everyone hates every brand.

    For every problem, there are HUNDREDS of happy, fully functional kits from EVERY brand currently out there.
    Companies don’t stick around if they truly suck, and they sure as Hell don’t get specc’ed OE if they do either.

    Oh well, leave it to the internet to let the 1% bitch…

  13. Gillis… You still will be spending more energy than the person behind you, but having someone drafting you saves you energy. It works in the low speeds and low power of cycling too. I still agree with you that an aero RD will not make much difference.

  14. Work in a shop long enough and you will learn to hate all components…
    Come to think of it, maybe it’s time to sell all of my bikes and buy a used 1998 BMW.

  15. @Mallory,

    I guess I should have been a little clearer (it was post shop ride and I was a little tipsy).
    If it is an FSA drivetrain component, yes, we do replace it. We have always been able to get our money back on what it costs us to change something out. The profits from the sale go to beer money. That’s how I get my guys to work hard for me. Money doesn’t make them work harder (I’ve tried it), but beer, shop rides, and fun atmosphere does.
    The customer never sees the expense and they have a bike that works.
    FSA’s hard-bits work just fine.

  16. Anyone know how the shifters is in terms of the UCI rules regarding the lenght from crank center to the bar end? Do they measure at the start of the shifter, the end or the middle?

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