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Ridley Helium SL Dura-Ace R9100/Ksyrium Elite Complete Road Bike - 2017

Sale $2,999.99$6,300.00 52% Off

Item # RID006Q

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  • Matte Black/Grey, XL ($2,999.99)
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Item # RID006Q


Simple nobility.

Helium is a noble element, which is the purest, simplest form of matter this side of breaking down into sub-atomic particles. So it's appropriate that, for the Helium SL Complete Road Bike—built here with Dura-Ace R9100 and Ksyrium Elite wheels—we've opted for the noblest, most peloton-proven drivetrain and what may well be the ultimate set of training wheels. We think the end product speaks for itself: a climb-happy race bike that makes no compromises on punchier walls or while winding up for the finale.

As a noble element, Helium is light. Really light. And Ridley didn't forget that while designing the frameset that bears its name. The Helium SL frame and fork are an astonishing 1050 grams — that's around 170 grams lighter than most other big-name brands pro frames and 200 grams lighter than the regular Helium. This was achieved through a strategic lay-up of unidirectional 60, 40, and 30-ton high-modulus carbon fiber, whereas the standard Helium only uses 30 ton. The SL also incorporates a nano resin to improve the compatibility of the resin and carbon, which decreases weight and increases durability.

The first time we built a Helium SL, we found ourselves questioning the strange seatstays and seatposts that have become all the rage in bicycle "innovation." The Helium's seatstays, which are simple, slightly flattened tubes, combine with the traditional 27.2 seatpost for a compliant ride by devouring road noise and bumps like Helium's halogen cousins gobble up other molecules' electrons. It's far more comfortable a ride than its drive stiffness and low weight suggest.

We're also enamored with the Helium's thoughtful blend of internal and external cable routing. The brake cables, which undergo some contortions without getting down near the grime-collecting drivetrain to get where they're headed, are left out in the open for ease of installment and maintenance. The derailleur cables, which travel dangerously close to the drivetrain and are therefore more susceptible to collecting debris, are routed internally—but it's a straight shot. No tricky bends or silly, internal tube shapes that you have to guess at in order to get the cables through.

  • A lightweight all-round bike that climbs as well as it punches
  • High-modulus carbon boosts stiffness and sheds grams
  • Geometry proven on the world stage by Lotto Soudal
  • Rear triangle maintains efficiency without harshness
  • Blend of internal and external routing for easy maintenance
  • Shimano's latest Dura-Ace kit redefines mechanical shifting
  • We've included our favorite training wheels—we'll leave the race wheels to you

Tech Specs

Frame Material:
60, 40, and 30-ton carbon fiber
Fork Material:
carbon fiber
Shimano Dura-Ace R9100
Front Derailleur:
Shimano Dura-Ace R9100
Rear Derailleur:
Shimano Dura-Ace R9100
52/36t Shimano Dura-Ace R9100
Bottom Bracket:
Crank Arm Length:
[XS - M] 172.5mm, [L - XL] 175mm
11 - 28t Shimano Ultegra 6800
Shimano CN-HG701
Shimano Dura-Ace R9100
Brake Type:
Zipp Service Course CRS-70 Ergo
Handlebar Width:
[XS] 40cm, [S - M] 42cm, [L - XL] 44cm
Bar Tape:
PRO Classic
Zipp Service Course
Stem Length:
[XS - M] 90mm, [L - XL] 100mm
Fizik Aliante R7
Zipp Service Course
Seat Collar:
Mavic Ksyrium Elite
Front Axle:
9mm quick-release
Rear Axle:
130m quick-release
Yksion Pro
Tire Size:
700c x 25mm
not included
Recommended Use:
Manufacturer Warranty:
5 years on frame

Geometry Chart


Helium SLX

Seat Tube

Seat Tube

Effective Top Tube



Stand Over

Head Tube

Head Tube Angle

Seat Tube Angle

Bottom Bracket Height

Bottom Bracket Drop


XS   48cm 52.5cm 52.7cm 37.4cm 75.5cm 13cm 72o 74o   6.8cm 40.5cm 97cm
S   51cm 54.5cm 54.2cm 38.4cm 77.5cm 14.5cm 73o 73.5o   6.6cm 40.5cm 97.7cm
M   54cm 56.5cm 57.3cm 39cm 80.4cm 17.5cm 73.5o 73o   6.6cm 40.5cm 98.7cm
L   57cm 58.5cm 59.9cm 39.6cm 83.4cm 20.5cm 73.5o 72.5o   6.3cm 40.8cm 100.5cm
XL   60cm 60cm 62.4cm 40.3cm 96.1cm 23cm 74o 72.5o   6.3cm 40.8cm 101.4cm

Reviews & Community


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is this geometry race or endurance?
What is the total weight on this build?

The Helium SL is technically a race geometry bike, however, their head tube is still fairly long to which keeps riders in a more upright position. So even though it is a race geometry, it will not be as low fitting on the front end as most companies race geometry frames.

Avg. ride time: 11h 41m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

What's the difference between the Helium SL and the SLX?
Also, what it the tire clearance on this model?

Hi Pablo, on the slx The front end sees a slightly different curvature at the tube junctions to help increase stiffness. 25's work great, 28's push it a little and depend on wheel and tire brand. Feel free to hit me up with any other questions.

Hi Pablo,

The SLX has a different carbon lay up. The SLX is a bit lighter, but the SL rides really nice and is pretty light as well. Please let me know if you have further questions

I am 172cm tall, and inseam 78cm, which size is suitable for me if i buy RIDLEY HELIUM SL DURA-ACE R9100/KSYRIUM ELITE; XS or S? Please advise.

Hey Harry,

An XS would be perfect for you. You may need a slightly longer stem but I can get that swapped out for you.

New model and 40% off. Why?

Hi Scott!

Great question. This is one of our in-house bike builds. We bought up the vast majority of Ridley's inventory of the 2017 Helium SL framesets and by buying so many we are then able to put together a phenomenal product package such as this and pass those savings onto our customers. I would be happy to field any other questions you have about this or any other product. Please reach out to me at: or 801.204.4674