We’ve all been there, grinding slowly up a never-ending climb as our cadence slows to a high-torque, barely moving crawl, fruitlessly clicking the shift lever in hopes that an ethereal body will drop out of the sky and deliver an extra cog to lighten the pressure. Airborne deities notwithstanding, SRAM swoops in with its Eagle one-by 12-speed drivetrain. Eagle’s gear range rivals that of a two-by system without the extra weight and worry of a finicky front derailleur. The SRAM XX1 Eagle 12-Speed Rear Derailleur brings the system together, driving precise gear changes across the entire cassette with a titanium spring and carbon fiber outer cage. Similar to SRAM’s one-by 11-speed offerings, this little derailleur holds a heap of technology bent on creating a pleasant riding experience with clean shifts and no unnecessary noise distracting from the outdoor ambiance. The Roller Bearing Clutch, long revered for its nearly unbeatable chain stabilization, gets an update with a repositioned upper pulley and larger lower pulley to accommodate the extra chain length needed to run such a wide range of cogs. Paired with a strengthened clutch, it efficiently manages chain tension to eliminate derailleur bounce and chain slap for a solid, noise-free ride. X-Horizon further boosts this stability by limiting movement across the horizontal axis, with its large upper pulley design maintaining a constant chain gap across the cassette. This effectively reduces shift initiation force and eliminates pesky ghost shifting, so you’ll drop into the right gear with minimal effort the second you want it. Last, but by far not the least, is SRAM’s Exact Actuation technology. Exact Actuation addresses the issue of different gears requiring different amounts of cable pull to shift, which in turn leads to loud cassettes and inefficient shifting. With Exact Actuation, each gear shift requires the same amount of cable pull, resulting in a predictable click and shift no matter where the chain sit…
This is SRAM Eagle groupset that contains GX Eagle cassette and chain with a X01 Eagle rear derailler and trigger shifter.
For Dura-Ace 9100’s redesign, it was only fitting for Shimano to update its ST-R9100 11-Speed STI Shifters alongside the reworked front and rear derailleurs. When it unveiled Dura-Ace 9100, Shimano subsequently gave a nod of solidarity to double cranksets and mechanical shifting for road. Rather than stubbornly refusing to let traditional standards die, Shimano demonstrates these technologies’ ability to transition into the future. Sure, a few of us at Competitive unabashedly love the soul of mechanical shifting, but with the crispness, precision, and sinewy curves of the new R9100 Shifters, the system makes the argument for itself. Shortening up the lever stroke and updating the internal shifting unit were first on the list for the shifters’ upgrades, and Shimano succeeded admirably at what it does best: creating incredibly reliable, functional componentry. Quick taps deliver smooth, effortless shifts along the cassette and crankset compared to 9000, whether you’re mashing down on the pedals in a race or out for a Sunday hill climb with your ride crew, which places Dura-Ace 9100 at the zenith of mechanical shifting. Shimano waved its meticulous wand over the brake levers as well, achieving improved hand/lever interaction by carving the lever blades into a more sinuous, contoured shape. This shape enhances braking leverage in a decidedly European style not previously seen from the more utilitarian brand, giving you the ability to shave, rather than dump, speed on serpentine descents from the hoods as well as the drops. Further, the brand cleaned up the hoods, sculpting them into a smaller, more organic shape that enhances both rider comfort as well as the groupset’s already classy aesthetics.
The SRAM RED Rear Derailleur has been designed to deliver the performance advantage you ve come to expect from SRAM. With WiFLi, the rear derailleur lengthens its cage and gets a slight variation in geometry to accommodate an 11-32 cassette. The new range of gears is wider than the standard triple chainring system and saves well over 250 grams. We ve paid rapt attention to the finer details, like adding a hollow titanium anchor bolt and even refining tooth geometry of the jockey wheel. The result is that the chain runs through the new RED Rear Derailleur smoother and quieter than ever before.
CAMPAGNOLO ATHENA SILVER Power Shift/Brake Lever 11-speed Ergopower
The SRAM X.0 Rear Derailleur can read your mind. Just think about shifting and BAMyoure in the right gear. SRAM routed the cable directly into the X.0 Derailleurs actuation mechanism to ensure precise and quick shifting without excess friction or weight. The X.0s shifting pawl is always engaged for Zero Loss Travel, and 1:1 Actuation moves the derailleur one gear for every unit of cable pulled or released. The result? Quick, effortless, and reliable shifting, time and time again.
Product Features
In the never ending conundrum of one-by gearing choices, we’ve spent many a day opting for ten-tooth speed only to end up grinding over merciless grades and wishing that an extra climbing gear could somehow fly out of the sky and save us in our time of knee-breaking need. With a massive gear range across 12 cogs, SRAM’s Eagle drivetrain swoops in to save the day and provide nearly the range of a two-by system in a simple one-by setup. The SRAM X01 Eagle 12-Speed Rear Derailleur ties the system together, driving precise gear changes across the entire cassette with a titanium spring and durable, forged aluminum body. Similar to SRAM’s 11-speed offerings, this little derailleur borrows a boatload of technology from its flagship XX1 sibling to create a budget-friendly, clean-shifting ride experience. The Roller Bearing Clutch, long revered for its nearly unbeatable chain stabilization, gets an update with a repositioned upper pulley and larger lower pulley to accommodate the extra chain length needed to run such a wide range of cogs. Paired with a strengthened clutch, it efficiently manages chain tension to eliminate derailleur bounce and chain slap for a solid, noise-free ride. The X-Horizon feature further boosts this stability by limiting the derailleur’s shifting movement across the horizontal axis, with its large upper pulley design maintaining a constant chain gap across the cassette. This effectively reduces shift initiation force and eliminates pesky ghost shifting, so you’ll drop into the right gear with minimal effort the second you want it. Last, but by far not the least, is SRAM’s Exact Actuation technology addresses the issue of different gears requiring different amounts of cable pull to shift, which leads to loud cassettes and inefficient shifting. With Exact Actuation, each gear shift requires the same amount of cable pull, resulting in a predictable click and shift no matter where the chain sits in the cassette. This also means an overall quieter,…
Adding functionality and convenience to your Shimano Di2 drivetrain, the Dura-Ace Di2 SW-R150 Remote Satellite Shifters give you the ability to shift the rear derailleur in an upright position when you’re resting and climbing. This is especially useful for preserving energy on long uphill grades where you need to shift without lowering into the drops. Separate buttons give you one-click controls for up and downshifts of the rear derailleur. It connects to the E-tube drop bar STI shifters of your Di2 drivetrain. The Remote Satellite Shifters come with connector cables, mounts, and tie-downs for a clean and secure attachment.