Today, Shimano rolls out a new road drivetrain that focuses on performance and affordability. The Tiagra R4000 Series is a 2×11 mechanical drivetrain featuring a new cassette, an ergonomic lever design, and other new features.
And while Shimano introduces this new system today, it’ll say goodbye (eventually) to the Tiagra 4700 10-speed drivetrain.
Shimano Tiagra R4000 Details
With the new Tiagra R4000, Shimano provided the modern performance roadies are looking for. Along with improved performance, it also hits the price points they wanted and saved about 200g along the way.
Cassette (CS-RS400-11) and chain (CN-HG601-11)
New in this drivetrain group is an 11-36T, 11-speed cassette that boasts a 327% gear range. Paired with multiple chainring options, this Hyperglide cassette allows you to find the needed gear ratio for everything from stout sprints to steep climbs.
If you have multiple new chains lying around from the pandemic days, don’t worry, you can still use them. Shimano carried over the HG-X11 direction chain from previous drivetrains as it shifts consistently well and is durable thanks to Shimano’s SIL-TEC treatment.
Crankset (FC-R4000)
Shimano offers two chainring pairings and multiple crank lengths for the new Tiagra crankset. First, the chainrings are offered in a 52-36T combo, or 50-34T. Then, the crank arms vary in length with 165, 170, 172.5, and 175mm offerings.
Front derailleur (FD-R4000)
Lighter and smoother front shifting is promised with the new front derailleur. The Tiagra 11-speed front derailleur features Shimano’s toggle-link construction and an optimized cage design, delivering precise, natural shifting performance.
Rear derailleur (RD-R4000)
Optimized and designed specifically for 2×11-speed road performance, the Tiagra rear derailleur delivers crisp, precise shifts. It is compact and lightweight, but more importantly, reliable for smooth shifting.
Dual control levers/shifters (ST-R4020-L / ST-R4020-R)
Using the advanced ergonomics from their 105 Series levers, Shimano built the new Tiagra levers from the ground up. The dual control levers provide consistent brake feel and crisp shifting. A redesigned lever position and bracket provide the comfort, control, and confidence needed on a long ride.
Tiagra R4000 Compatibility
Here is what Shimano wants you to know before you click “buy” on the new Tiagra R4000 drivetrain.
“To support consistent shifting performance, frame and drivetrain compatibility should meet the following targets:
- Chain: Shimano 11-speed-compatible chain (CN-HG601-11 and CN-LG500 specified for the series)
- Rear hub spacing (O.L.D.): 135–142 mm
- Chainstay length: from 410 mm
- Chainline: 43.5 mm (consistent with modern road front-shifting targets)
- Pitch Circle Diameter (PCD): 110 mm (for the specified crank platform)
- Front derailleur clearance: comparable to FD-R7000-type fit considerations (modern disc-road-oriented cage/clearance approach)
- Front chainring clearance: comparable to FC-RS510-type chainring/crank fit expectations
- Freehub interface: HYPERGLIDE (HG) Spline M and HG Spline L (with 1.85mm spacer) (11/12-speed).”
The new Tiagra R4000 sits just above Shimano Cues U6030 and 105 R7000. Pricing is as follows:
- Rear derailleur: $70
- Front derailleur: $55
- Crankset: $160
- Levers: $240 each
- Cassette: $70
Shimano said they expect to phase out the older 10-speed Tiagra drivetrain by early 2027. See all the details at bike.shimano.com.
