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Ridley Helium ISP/Shimano Ultegra 11 Complete Road Bike

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Item # RID001E

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By now, it should come as no surprise that added weight equates to added time getting up the mountain. That's why the Ridley Helium ISP/Shimano Ultegra 11 Complete Road Bike was designed to closely approach the UCI’s 6.8kg limit. In fact, it's frame is a full 300 grams lighter than Ridley's successful Damocles frame. The bike features increased stiffness and stability, and while we won't guarantee that you'll climb faster, you’ll at least feel lighter. It's the little things.

The Helium frame tips the scales at just over 900 grams, without the fork, which is less than that of Ridley's pave-flagship, the Excalibur. This was accomplished through its use of superior grades of carbon fiber. In fact, the Helium predominantly uses both 30- and 24-ton carbon fiber, with areas of 40-ton and 50-ton reinforcements (in comparison to the 24-ton carbon used on the Excalibur). But, if you're wondering what the "ton" designation is, it essentially reflects how many tons of pressure per square millimeter that the carbon is able to withstand before failure. Thus, 30-ton carbon will withstand 30 tons of pressure per square millimeter. By using high-grade carbon, Ridley's able to use less carbon in the production process. After all, common logic tells us that the stronger a material that's used, the less of it that's need. As a result, the Helium is able to achieve a lower frame weight. And to further reduce weight, the Helium also utilizes full-carbon dropouts with stainless steel inserts. Additionally, it doesn't use any aluminum in the head tube bearing races.

And while materials are a key foundation for a sound strength-to-weight ratio, the construction process and tube shapes are of equal measure. Along these lines, we find it comforting that Ridley draws its tube shape inspiration from the most tested designs on earth — nature itself. You'll find that Ridley's strongest frames, like the Fenix, feature tube shapes inspired by the diamond. Meanwhile, frames like the Helium are based off of the circle. Yes, the circle. As Ridley asserts, the circle reflects the best stiffness-to-weight ratio in nature, as it requires the least amount of materials in order to achieve the highest amount of strength. Accordingly, you'll find that Ridley designed the tube shapes of the seat, top, and down tubes with rounded, circular shaping. However, for sake of even higher rigidity, and weight savings, the top tube has been slightly tapered. Adding to this theme of lightweight rigidity, the Helium features a hollow-molded bottom bracket. This design allowed Ridley to remove excess materials, and the ability to reshape the conjoining tubes. As a result, needless weight has been eliminated, while lateral rigidity has been increased.

Going a step even further, Ridley also built the front triangle of the Helium with a monocoque construction. Ready for a little lesson on carbon construction? Surprisingly, the definition of the monocoque process is hidden within the name — "mono" being Latin for "one," and "coque" being French for "shell." So, as logic would have it, monocoque carbon fiber is formed as one piece in a single mold. This system allowed Ridley complete creative control in developing the Helium. From the geometry to the tube shaping to the layup, every design parameter is attainable with monocoque, whereas the tube-to-tube construction method that you see on halo bikes is far more limiting for the engineer. As a result, the front triangle was met by flat-designed seatstays and oversized chainstays. Essentially, this design increases lateral stiffness, while also absorbing road vibration. Additionally, Ridley engineers were able to incorporate an integrated seatpost, again keeping with the theme of stiffness-to-weight. This feature allows you to deliver more power to the pedals while seated during climbs, and just as importantly, it provides increased aerodynamics and stability while cornering for the descent.

The Helium comes with a matching Ridley 4ZA monocoque full-carbon fiber fork and a proprietary FSA integrated headset. This system further increases rigidity under load, especially where the Helium excels, on the climbs. Additionally, this characteristic has been further increased through the incorporation of a 1-1/8 x 1-1/2-inch head tube. And with a 99.0cm wheelbase, a 73 degree head tube angle, and a 73 degree seat tube angle (size Medium), the Helium is guaranteed to descend confidently, and more importantly, quickly.

The Helium has been built up with a complete repertoire of Shimano Ultegra 6800 11-speed components. When Shimano revamped its trusted Ultegra groupset under the new 11-speed 6800 banner, it did so only after carefully studying the mechanics of its flagship Dura-Ace 9000 mechanical group. The new group was engineered to mimic both the 11-speed functionality and beautiful aesthetics of its popular older sibling. Featured here is a 50/34t crankset and a 11-25t casette. Paired with the Shimano Ultegra, is a HED Ardennes LT wheelset that's been cased in Schwalbe Lugano clincher tires. Finishing the build are Zipp’s Service Course Handlebar and Stem. A Selle Italia SL Kit Carnonio saddle sits on the integrated seat mast.

The Ridley Helium ISP/Shimano Ultegra 11 Complete Road Bike is available in the color Red/black and in five sizes from X-Small to X-Large. Given its compact geometry, we strongly suggest that you focus on the virtual top tube length as you make a determination of the proper size. Please provide us with your Bottom Bracket-Saddle Rail height in the "Comments" section of our order form, so we can properly cut down the seat tube for delivery. Please note that the post's maximum cut-off length from the top of the seatpost is 60mm.

Tech Specs

Frame Material:
30T high-modulus carbon fiber, 24T high-modulus carbon fiber
4ZA Helium
Fork Material:
carbon fiber
1.125 x 1.5 in
Shimano Ultegra 6800 11-speed
Front Derailleur:
Shimano Ultegra 6800
Rear Derailleur:
Shimano Ultegra 6800
50/34 t Shimano Ultegra 6800
Crank Arm Length:
[x-small] 170 mm, [small, medium] 172.5 mm, [large, x-large] 175 mm
Bottom Bracket:
PressFit 30
not included
11-25 t Shimano Ultegra CS-6800
Brake Levers:
Shimano Ultegra 6800
Brake Calipers:
Shimano Ultegra 6800
Zipp Service Course
Handlebar Width:
[x-small, small, medium] 44 cm, [large, x-large] 46 cm
Handlebar Drop:
Bar Tape:
Arundel cork
Zipp Service Course
Stem Length:
[x-small, small] 90 mm, [medium] 100 mm, [large, x-large] 120 mm
Selle Italia SL Kit Carbonio
integrated mast
HED Ardennes LT
Schwalbe Lugano
Tire Size:
700 c x 23 mm
Claimed Weight:
[size medium frame and fork] 1250 g
Recommended Use:
road cycling and racing
Manufacturer Warranty:
5 years on frame

sizing chart

Bike size by rider height


Geometry chart



Geometry Chart


 Seat Tube
Seat Tube (c-t)

Effective Top Tube






Stand Over

Head Tube Length


Head Tube Angle


Seat Tube Angle


Bottom Bracket DropChainstayWheelbase
XS 44.0cm 67.0cm 52.5cm 53.0cm 37.5cm 74.0cm 13.0cm 72.0o 74.0o 6.8cm 40.5cm 97.4cm
S 47.0cm 70.0cm 54.5cm 54.5cm 38.5cm 75.0cm 14.5cm 73.0o 73.5o 6.6cm 40.5cm 97.7cm
M 50.0cm 74.0cm 56.0cm 57.5cm 39.0cm 78.0cm 17.5cm 73.5o 73.0o 6.6cm 40.5cm 99.0cm
L 53.0cm 77.0cm 58.5cm 60.2cm 40.0cm 81.0cm 20.5cm 73.5o 72.5o 6.3cm 40.8cm 100.3cm
XL 56.0cm 80.0cm 60.0cm 62.5cm 40.5cm 84.0cm 23.0cm 74.0o 72.5o 6.3cm 40.8cm 101.2cm

Geometry Chart

Reviews & Community


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Here's what others have to say...


So far? Excellent!

  • Familiarity:I've used it once or twice and have initial impressions

I lost my Scott Foil to an accident recently and was browsing for a replacement here on CC. Marc D. suggested I take a closer look and I'm glad I did. At the sale price, it's a no brainer. You get Ultegra 11, a phenomenal wheelset, and an excellent cockpit. Even if you find you hate the frame, your components are top notch. So I bought it, without loving it or riding it.

The package arrived and was superbly packed. I wasn't sure how much assembly I'd need to perform but it was easy, too easy. Mount your bars, wheels, pedals and ride.

It's been on only one major ride. It accelerates with fury and brakes equally as well. The 25mm tires give a sense of confidence and a smooth ride. The Ultegra 11 is by far and away the best gruppo I've ridden yet (105, Ultegra 9700). The shifts are effortless, the brake modulation is impressive. You can honestly tell the difference.

The bike handles more nervously than my Foil but there are so many differences, it's hard to tell where the fault lies (wider bars, wider tires). That said, it locks in and tracks with laser precision - it's just something that will take some time getting used to.

The bike has already bested the Foil on a favorite decent of mine from said ride. It's a short winding decent through the trees finishing to a long straight. I wouldn't have guessed it was faster and I couldn't say I did anything different Maybe it's the new bike adrenaline? The different tires? The confidence to go a little faster through the corners thanks to the wide tires? Maybe it's the minutia that separates all of the top end bikes nowadays and I just had a few more watts in my legs that day.

Thanks to CC, great build, superbly put together and packaged with utmost care. Thanks to Marc D for the great service!

So far?  Excellent!
Avg. ride time: 5h 10m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Climber's Delight

  • Gender:Male
  • Familiarity:I've put it through the wringer

In Colorado, it is all about being a great climber. I own a Madone 3.1 and upgrading to a Ridley Helium was the best bike I could have bought. It climbs like a dream; I have gears left over on climbs I would ride on my Madone and be locked in 1st or 2nd gear. The carbon frame with the seat mast eliminates a lot of road vibration as well. I recently road one of the steepest roads in the country according the Forest Service who recently resurfaced the road Crystal Dam Road in the Black Canyon Of The Gunnison. 5-miles long at an average grade of 19%, I do not think I would have made it on my Madone; and took a 10th place on the first try anyway.

Can I swap out the crank from 50/34 to...

Can I swap out the crank from 50/34 to 52/36 for the same price? Same Ultegra model

Responded on

Yes, it can be done- contact me direct for details.

Unanswered Question

is the 7,280 g weight fully decked out,...

is the 7,280 g weight fully decked out, including the spec'd wheel set?

how much is it costs to send it to Republic...

how much is it costs to send it to Republic of Korea ?(international shipping to Republic of Korea )

Responded on

In order to find out, add the item to your cart and proceed to checkout as if you were going to buy it. Next, enter your shipping info. That will calculate the shipping cost for you. You may also be responsible for tariffs and import taxes though.


This is an awesome bike...

  • Familiarity:I've used it several times

After having owned a Damocles (Size L) a number of years ago, I was really excited to get a new Ridley (in fact, I've always regretted selling that bike). Wes helped me out with sizing, and at 6'4" (175 lbs), I went with the XL in the Helium, and he was good enough to swap out the 120mm stem for a 110mm. Having taken the bike out on a few rides in and around Bend, OR, I have to say that this is the best bike that I've ever owned. Even though I've ridden older DuraAce and Sram Red, the Ultegra 7800 is awesome. It climbs beautifully, and I love the compact set-up, and I find that I'm spinning easily, but still climbing faster than I have in the past. The bike, with pedals, Garmin, and bottle cages weighs in at 16.6 lbs. by my calculations.

Responded on

awesome! really is an amazing bike. Glad you are liking it!


Buy this bike now

  • Gender:Male
  • Familiarity:I've used it several times

I'm 72" tall, 179 lbs. 35" inseam. I live in SE North Carolina (flat as a pancake but windy :) ) and purchased this bike in medium as a present to myself for my 50th bday. I ride 4 days a week and try to get 125 to 150 miles, life permitting. Overall impression is 9 out of 10 for this ride. Fit and finish on the frame is great, and at 16 lbs it is not wimpy. I have not heard a squeak anywhere. Comp Cycle did a first rate job on the set up, out of the box it was 30 minutes to inspect it, set it up and start riding. The only changes I have made is to replace the saddle and bar tape.The wheel set with 25 mm tires rides smooth as glass, and the groupset shifts quick and accurate. At $2300 this bike is a steal. Don't over think this, buy this bike now and yes I recommend this bike and Comp Cycle to everyone.


Anyone care to describe the difference in...

Anyone care to describe the difference in ride quality between helium and helium sl?

Best AnswerResponded on

The Helium SL is a little lighter and slightly stiffer frame so great for climbing but a little stiff for distance riding.This can be remedied by using 25mm tires to help smooth it out.


Sizing Help?

    I'm 5'11" with a 33.5 in inseam. Currently riding a bike with a 54.5cm top tube measured c-t-c. Would I be better off getting a size Medium and running a short stem or size Small? Given my height the Medium makes sense, but the Small makes sense from a top tube perspective.

    Responded on

    Hi Rob...i would put you in a medium running a slightly smaller stem. You are exactly my physical dimensions and a medium with a 90mm stem fits perfectly. I would be happy to change out the stem size at no charge. Contact me direct at or 801-736-6396 x 4074. Thanks!


    Amazing Value

    • Familiarity:I've used it several times

    This is an amazing ride at an incredible value. I have had the opportunity of riding the Helium and i must say it is special. Very light weight (this build weighs in at 16 pounds) and handles extremely well climbing and descending. Its just stiff enough to punch out amazing power yet still incredibly comfortable for longer distances. Combine that with the durability of Ultegra 6800 (11speed) group, the stability of HED Ardennes LT Wheels and a dependable Zipp cockpit makes this bike very well rounded and competitive. If you have the means I highly recommend picking it up (while they last!)

    This bike is a custom build so if you want to specify cranks,stem lengths or cassette let me know. if you have additional questions or need guidance

    801-736-6396 x 4074



    Red Rocket

    • Familiarity:I've put it through the wringer

    I'm so pleased with my choice. The Ridley Helium is just a great looking ride, a head turner. But It not only looks sweet, it rides that way also. Nibble and responsive, It's a confidence builder on winding, hilly rides.

    I'm so happy with Competitive Cyclist's great service that I bought a Competitive Cyclist jersey. I will be recommending CC for sure.


    Once the mast is cut, is there adjustability...

    Once the mast is cut, is there adjustability with the seat mount? Meaning, can I move it up and down a certain distance.

    Responded on

    Once cut, the mast topper allows for an additional 15mm of vertical adjustment. To go lower, you'd have to cut more of the mast off. We recommend you measure your current saddle height from the center of the bottom bracket to the base of you seat rails. Please let me know if I can help with anything else,

    Hi, i am 6' with a 32 1/2" inseam. Your...

    Hi, i am 6' with a 32 1/2" inseam. Your frame calculator puts me at a 55 cm bike. I have had neck and lower back problems in the past so am keen on a comfortable fit- most of my riding is in the Alps so I am keen to be as comfortable as possible on climbs. What size would I be on this bike? And if not this, what would you recommend for someone with my (brief!) description above? thanks!

    Responded on

    With its integrated seatmast, saddle height from center of bb to base of seat rails is going to be an important measure. Shoot me an e-mail with that measure and your current bike,

    Hi ! I would like to purchase X-small...

    Hi !

    I would like to purchase X-small size of Helium but can't select X-small size on the select option. Is it available to buy X-small size as above same condition (50% off)

    If it is available, How to order X-small size on the web site?


    Responded on

    looks like we are sold out of the XS in the sale frame-however, we do have a 2014 framset available-it comes with a standard seat post instead of the ISP. It would be a $799.00 upgrade for the 2014 frame- still an amazing value. Contact me direct and I can get it set up for you. 801-736-6396 x 4074

    What size is good fit for me?I am 172cm...

    What size is good fit for me?I am 172cm tall, and 78cm inseam.Please let me know a proper size for me.Best regards,

    Responded on

    you would be in a small running a shorter stem. Feel free to reach out to me direct at 801-736-6396 x 4074 or for further sizing questions.

    What is the rider weight limit reccomendations...

    What is the rider weight limit reccomendations for ridley helium sl xl? I am 240 lbs

    Responded on

    Ridley doesn't have a posted rider weight limit for any of their bikes. The Helium is their lightest, climbing oriented frameset, so some larger riders may be better suited on their Fenix frame.

    Hi, I purchased a small Ridley Helium(red)...


    I purchased a small Ridley Helium(red) above yesterday. Is is possible for you'll to switch out the compact crank with a standard 53/39 crank? And switch the cassette to 11-23 before shipping. One of the guys from competitive cyclist indicated this would be no problem.

    Also I will get back with my BB to Seat Rail Measurement today.



    Best AnswerResponded on

    yes, it is definitely possible to change out those items. I will be in touch

    Is it a product of 2013? The painting...

    Is it a product of 2013?

    The painting looks like a product in 2012.

    Is it different from the real product in an appearance?

    Responded on

    The frames are all 2013 frames. The black and white paint scheme is a carryover from 2012. The black and red scheme was new for 2013

    What is a good size for me? I'm 5'11...

    What is a good size for me?

    I'm 5'11 with a little over 33in inseam

    Responded on

    A Medium would likely give you the geo you need. May have to run a bit shorter stem though.

    Avg. ride time: 9h 30m per week
    • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

    Frame-only shows a 68mm English-threaded...

    Frame-only shows a 68mm English-threaded BB, but this lists a PF30 BB. Is this a different frame than the Frame-only offering?

    Responded on

    The tech spec is incorrect, this is the same frame built up with the 6800 groupo. The bottom bracket is an English threaded 68mm.