Helium is a noble element, which is the purest, simplest form of matter that you can get without breaking down into subatomic particles. So it's appropriate that, for the Helium SL 10 Complete Road Bike, Ridley opted for a simple, traditional, and proven kit with just a sprinkling of new pieces of tech that are actually effective enough to warrant their inclusion. No marketing gimmickry here, just stuff that works and that's been proven to work. Like its noble namesake, the Helium SL isn't interested in participating in the chemical reactions of passing fads, and it will continue to shrug off the hype machine's products du jour for years to come. Helium is also 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 the use of a sophisticated carbon selection, utilizing a strategic placement of unidirectional 60, 40, and 30 ton high modulus carbon fiber, whereas the Helium only uses 30. The SL also incorporates a nano resin to improve the compatibility of the resin and carbon, which decreases weight and increases durability. While we were building the bike, we found ourselves questioning the strange seatstays and seatposts that have become all the rage in bicycle innovation. The 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. 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...