Instead of telling gravel riders what they needed, we asked them what they wanted. Shimano spent two years listening and countless hours speaking with gravel enthusiasts from all over the world. We took to dirt and gravel roads, narrow singletrack paths, creek crossings, and mountain passes to test ourselves and our notions of drop bar cycling. We pinned on race numbers and packed up bikepacking bags. We choked on dust and reveled in mud. And the result of all that riding and all those new friendships? First, Shimano’s Gravel Alliance and now, Shimano GRX, the world’s first dedicated gravel component series.Choice. Shimano’s new GRX line is all about choice. Shimano doesn’t want to pigeonhole the way you ride, or decide for you what the best solution is for your riding style. While we’ve long been fans of double chainring drivetrains, we also recognize the value of a single chainring system. With GRX, Shimano offers both, each with gearing options that allow you to tailor your drivetrain to suit your tastes.With two different derailleur cage lengths, Shimano GRX ensures stable shifting and chain retention across a wide range of gearing options. Looking for maximum range while maintaining road cassette progression? Go with GRX’s 800 series 2x11 RD-RX810 or Di2 RD- RX815 rear derailleurs, designed for close ratio clusters, with 48/31 chainrings and an 11-34 cassette. Paired with 700c x 40mm tires, it delivers a top gear similar to a road bike with 25mm tires and a 50 x 11 gear. And on the low end, with its 31 x 34 combination, you get a gear that early mountain bikers would envy. It is the lowest gear currently on offer for premium road drivetrains (aside from Shimano’s own GRX 2x10 30-36 offering), perfect for climbing loose, dirt and gravel surfaces.Want to drop some weight, simplify your shifting, and still maintain a versatile range? Consider the 1x11 GRX option with either Shimano’s 11-40 or 11-42 cassette and a 40 or 42-tooth equipped crankset, shifted by a RD-RX812 or Di2 RD-RX817 wide ratio rear derailleur. You’ll lose a little, absolute top speed, but still love the 1:1 low gear ratio. If you live in an area without sustained or steep climbs, you might love the smaller gear steps of that same 1x11 front chainring with an 11-34 cassette. Options abound.What about when the weather turns autumnal and you contract a case of cyclocross fever? GRX 1x11 can quickly transform from gravel fun to CX focused with the change of a cassette.No matter the option you select, GRX rear derailleur offerings feature Shimano’s SHADOW Plus chain stabilizer that can be turned on or off depending on conditions. SHADOW Plus revolutionized the mountain bike world and now it’s been tuned for gravel and rough road riding in GRX. With a quieter drivetrain, SHADOW Plus helps you engage with your surroundings and enjoy time outside.Today’s gravel riders demand more of their bikes and of themselves. Shimano GRX gives them the options they need to Explore Beyond, tailoring their drivetrains to suit their needs and exceed their expectations. We’ll see you out there!Designed for riding on rough roads, through gravel and mud, to be able to carry on in comfort, stress-free, to wherever you want, to allow you to achieve that unique sense of accomplishment. The first groupset designed for Gravel riding Explore beyond. Introducing SHIMANO GRX.Game-Changing Innovation.Even on the roads less travelled, our new GRX tech will keep things smooth, silent and safe – with you always in control.Designed from the ground up for gravel adventure.Mix and match components to customise your bike for a wide range of terrains – and ride the way you want!Key Features:Adjustable chain stabilizer prevents chain slapping and drops,Switch stabilizer ON/OFF to match the terrain,Gravel-tuned clutch tension,Silent and uninterrupted rear shifting on rough terrain,Smooth and reliable mixed surface shifting,Compatible with current road DUAL CONTROL LEVER,Top sprocket: Max. 11T/Min. 11T,Low sprocket: Max. 42T/Min. 40T,Total capacity: 41T.
With an integrated chain stabilizer mechanism, the Shimano GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain.Adjustable chain stabilizer prevents chain slapping & dropsSmooth and reliable mixed surface shiftingCompatible with current road dual control leverTop sprocket: Max. 11T/Min. 11TLow sprocket: Max. 42T/Min. 40TTotal capacity: 31TWith an integrated chain stabilizer mechanism, the SHIMANO GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features an ON/OFF switch for the chain tensioner. Its compatible with current road dual control lever and gives you precise shifting every time.
With an integrated chain stabiliser mechanism, the Shimano GRX RX 815 Di2 Rear Derailleur provides a quieter experience and shifting security and precision on mixed terrain.Adjustable chain stabiliser prevents chain slapping and dropsSwitch stabiliser ON/OFF to match the terrainSilent and uninterrupted rear shifting on rough terrainLow sprocket: Max. 34T/Min. 30TSuitable for use with double chainsetsFor rides on smooth surfaces, the derailleur features and ON/OFF switch for the chain tensioner allowing you to adapt to the type of surface ahead. The adjustable chain stabiliser prevents chain slapping and drops and gives you silent and uninterrupted shifting on rough terrain.
This superb 11 speed model allows for smooth shifting, so you'll always have a gear for tackling ever inch of the mountain. Additionally, it comes in low and high direct mount options available to select.
This front mech features a tough alloy construction, which makes it ideal at handling all the abuse that comes with blasting across the mountain at speed. Shimano has also equipped this model with a side-swing side-pull design that decreases problems with tyre clearance and reduces cable friction. Technologies: Side Swing: Side swing, side pull front derailleur decrease problems with tyre clearance and reduces cable friction. Designed specifically with modern trail bikes in mind, Shimano side swing technology front derailleurs increases tyre clearance, while cable routing resulting in the lightest shifting action yet. Wide Pivot Link: Wide pivot link design for greater torsional rigidity improves shifting response and service life.
This front mech features a side-swing side-pull design, which decreases problems with tyre clearance and also reduces cable friction. This makes it ideal for use with modern trail bikes, as its side-swing technology results in the lightest shifting action yet. One final highlight is its wide pivot link delivers greater torsional rigidity, improves shifting response and also offers a longer service life. Part Numbers: Low Clamp Side Pull Low Clamp: FDM3120MBX4; Low Clamp Side Pull Direct Mount: FDM3120D4; E-Type Side Pull E-Type: FDM3120E4; High Clamp Side Pull High Clamp: FDM3120MX4 Technologies: Side Swing: Side swing, side pull front derailleur decrease problems with tyre clearance and reduces cable friction. Designed specifically with modern trail bikes in mind, Shimano side swing technology front derailleurs increases tyre clearance, while cable routing resulting in the lightest shifting action yet. Wide Pivot Link: Wide pivot link design for greater torsional rigidity improves shifting response and service life.
Acera mountain bike rear derailleur with light action operation and over-size pulleys for a wide gear choiceOversize 13-tooth tension and guide pulleys to reduce noise and wearExtension spring and low-friction fluorine-coated link pivot bushing result in a light shifting actionTop normal spring for use with Rapidfire shiftersIG and HG chain 7- and 8-speed compatibleFor use with 28 to 34 tooth low rear sprockets total capacity 43 teeth
This MTB front mech features a tough alloy construction with a reinforced steel chain guide, which makes it more than ready for any off-road ride. Developed with modern trail bikes in mind, Shimano has kitted out this version with Side Swing technology, which increases tyre clearance while its cable routing results in the lightest shifting action yet. Part Number: Direct Mount: FDM4100D4; E-Type: FDM4100E4; Low Clamp: FDM4100MX4 Technologies: Side Swing: Side swing, side pull front derailleur decrease problems with tyre clearance and reduces cable friction. Designed specifically with modern trail bikes in mind, Shimano side swing technology front derailleurs increases tyre clearance, while cable routing resulting in the lightest shifting action yet. Wide Pivot Link: Wide pivot link design for greater torsional rigidity improves shifting response and service life.
This front mech features a robust alloy construction, which makes it perfect at withstanding all the abuse that comes with blasting across the mountain at speed. Shimano has also kitted out this model with a side-swing side-pull design that decreases problems with tyre clearance and reduces cable friction. Technologies: Side Swing: Side swing, side pull front derailleur decrease problems with tyre clearance and reduces cable friction. Designed specifically with modern trail bikes in mind, Shimano side swing technology front derailleurs increases tyre clearance, while cable routing resulting in the lightest shifting action yet. Wide Pivot Link: Wide pivot link design for greater torsional rigidity improves shifting response and service life.
This rear shifter features Shimano's renowned Vivid Indexing technology, which is light to the touch and provides a constant amount of shift lever force across all 11 sprockets. Coming kitted out with 2-way Release technology, this rear shifter can be released using your thumb or index finger for greater control on every MTB ride. Please note: An inner cable is included with this rear shifter but outer cables are available separately. Included: Complete with Optislick inner cable. Part Numbers: I-Spec EV Right With Display: SLM5100IRD; Band On Right With Display: SLM5100RD; Band On Right No Display: SLM5100R; I-spec EV Right No Display: SLM5100IR Technologies: 2-Way Release: 2-way release allows shifting from various riding positions; the upper lever still performs the same shift function, but it can now swing in either direction allowing it to be released by the thumb or index finger. Vivid Indexing: Light to the touch but positive and crisp, Vivid indexing provides a constant amount of shift lever force across all 11 sprockets.
Shimano M5100 Deore 11Sp Shadow+ Rear DerailleurThis 11 speed MTB rear mech is specifically designed to bring even more adventure to your outdoor lifestyle. It features a rock-solid alloy construction, which makes it perfect at withstanding all the intensity that comes with shredding the trails. Shimano has also equipped this model with Shadow Plus technology, which features a super low profile design and an optimised slant angle for super light shifting action on the toughest of rides.Features: Material: Alloy Pin Bushing Finish: Fluorine-coated link pin bushings Use: MTB Speed: 11 speed Cage: SGS Long Cage Profile: Low Pulley Tooth Count: 13T Cable Routing: Direct cable routing Links: Wide links Max Low Sprocket: 51T (1x 12-speed) Capacity: 40T capacity SGS cage Part Number: RDM5100SGSTechnologies: Shadow Plus: Shadow plus features a super low profile design and optimised slant angle for super light shifting action. Shadow Plus uses a chain stabilising switch that when on will reduce chain bounce in rough terrain maintaining more stable drive and shifting.Single Tension Spring: Prevents contact with the chainstay resulting in a silent ride.Direct Cable Routing: Direct cable routing prevents snagging from any trail side hazards.13T Pulleys: 13T pulleys and decreased derailleur tension prevent high chain tension in low gears.Springs: Strong return spring for a positive shifting feel. Top normal spring uses the spring to select higher gears.A 2-year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).Buy Shimano Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
This MTB front mech features a shifter pod design with 2-way release for cost-effective Dyna-Sys 2 speed shifting performance. Its 2-way release allows shifting from various riding positions, which means that it can be released in either direction using your thumb or index finger. Shimano has also kitted out this version with vivid indexing, which provides a constant amount of shift lever force across all sprockets. Item Top Features Continued: Adjustment: Multi-position adjustable handlebar clamp, barrel adjuster Includes: Complete with Optislick inner and SP41 outer cables Part Numbers: Band On Left No Display: SLM5100L; I-Spec EV Left No Display: SLM5100IL Technologies: 2-Way Release: 2-way release allows shifting from various riding positions; the lever still performs the same shift function, but it can now swing in either direction allowing it to be released by the thumb or index finger. Pod Design: Pod design allows the use of these shifters with any brake lever. Multi-position Adjustable Handlebar Clamp: Multi-position adjustable handlebar clamp for custom lever positioning. Barrel Adjuster: Barrel adjuster for fine gear tuning. Vivid Indexing: Light to the touch but positive and crisp, Vivid indexing provides a constant amount of shift lever force across all sprockets.