Shimano has announced the launch of a new Tiagra groupset after stating in 2023 that the all-encompassing CUES family would replace all Shimano groups up to and including Tiagra.
The new group of components looks to answer the questions CUES has failed to address in the eyes of product managers and bike buyers.
New Tiagra R4000 offers 2x 11-speed with two chainring options, accessible gearing and a new more ergonomic lever design to suit a wider range of riders. The emphasis on adjustment could make new Tiagra a great option for juniors.
Shimano also claims like-for-like configurations of the new R4000 with the current-generation Tiagra are more than 200g lighter.
Why return to Tiagra?
As I reported last last year, the reaction to Shimano's push with CUES into the entry-level road bike market was lukewarm at best. I found very few examples of CUES-equipped bikes.
Instead, product and brand managers were happier to continue with the soon-to-be-phased-out 10-speed Tiagra rather than switch to the robust all-road styled CUES.
New Tiagra looks like what we’ve been asking for
Only a few weeks ago, I wrote how I wanted to see a new performance-oriented, entry-level option from Shimano. That was based on what I saw as the lack of innovation for the huge market of affordable road bikes, and from talking to key industry figures.
Well, Shimano obviously thought the same. We now have a range of components with both looks and key specifications to meet the needs of this broad, large range of bikes.
The biggest change from previous Tiagra, and indeed CUES, is the shifters. Shimano says the ergonomic profile means easier reach across a wide range of hand sizes. The design has the same ergonomics as the latest 105, using the same redesigned lever and bracket positioning.
The 2x 11 options include only a single 11-36 cassette, although it’s joined by both a 52/36 pro compact pairing and a more traditional compact 50/34 option.
Styled for the road
Where the new Tiagra scores in my eyes is its styling. Unlike the chunky, robust-looking CUES, Tiagra R4000 carries the same styling and DNA as Shimano’s high-end groups. The 105-alike levers are smoothly styled, while the integrated look of the crankset shares design cues with 105, Ultegra and the flagship Dura-Ace.
The low-profile and compact rear derailleur has classic road-component vibes, especially when viewed alongside electronic derailleurs with built-in batteries, as we now have from Campagnolo, SRAM and Shimano.
The downside is that, although Shimano has announced a new Tiagra today, the existing Tiagra is not set to be phased out until early 2027. So, while we can be excited at the advancements on offer, we won’t see bikes with the new components until the 2027 model year.
I’ve quizzed representatives from many major bike brands and, although all have expressed excitement about Tiagra R4000, none have confirmed models or price ranges we’ll see the groupset featuring on. Understandably, their focus is on current ranges rather than what comes next.
New Shimano Tiagra spec, price and weight details
Rear derailleur: RD-R4000
The new RD-R4000 rear derailleur looks very similar to 12-speed 105, with what looks to be a more compact cage, and the main body having elements of the 105’s low-profile shadow shape.
Rather than it being a full low-profile shadow design, the main cable port on Tiagra is more exposed. At a claimed 275g, it's only 2g lighter than the current Tiagra.
Front derailleur: FD-R4000
The new front derailleur is available in both band-on and braze-on versions, with Shimano’s toggle link action first introduced on mechanical Dura-Ace 9100.
It uses a compact cam-driven mechanism that results in lighter action and reduced lever throw – another improvement for small hands, asserting Tiagra as a great option for kids' road bikes. The new front unit is marginally heavier than its predecessor (95g compared to 91g).
Crankset: FC-R4000 (52-36 and 50-34t options)
The crankset looks much like the latest 12-speed 105 with the smooth flow of the crank spider into the outer ring. I think this is the single biggest improvement over both its predecessor and CUES.
With 52-36 and 50-34 options, it shows Shimano views the new Tiagra as a true performance option, too. It’s available in 165, 170, 172.5 and 175mm length options. The 907g weight (50-34, 172.5mm) is lighter than the outgoing version's 926g.
Shifters: ST-R4020-L (left), ST-R4020-R (right)
The new shifters share the same ergonomics and profile as mechanical 12-speed 105 and are hydraulic disc brakes only. The weight is a claimed 622g a pair – a significant saving over the previous generation's 740g.
The brakes are the existing BR-RS405 hydraulic caliper.
Cassette: CS-RS400-11
The final new component is the 11-36-tooth cassette. Obviously, this is now 11-speed rather than 10-speed – hence a slight increase in weight to 398g from 384g. The compatible chain is the current CN-HG601-11 – a directional super-narrow HG-X11 unit with Shimano’s SIL-TEC treatment on the plate surfaces.
- Rear derailleur, RD-R4000. Weight: 275g. Price: £64.99 / €59.99
- Front derailleur, FD-R4000-F. Weight: 95g. Price: £39.99 / €37.99
- Front derailleur, FD-R4000-B. Weight: 111g. Price: £39.99 / €37.99
- Crankset, FC-R4000, 52-36T. Weight: 917g. Price: £139.99 / €134.99
- Crankset, FC-R4000, 50-34T. Weight: 907g. Price: £139.99 / €134.99
- Shifters ST-R4020-L, ST-R4020-R. Weight: 622g (pair). Price (each): £174.99 / €169.99
- Cassette, CS-RS400-11. Weight: 398g. Price: £64.99 / €59.99
What does Shimano say?
We originally reported on CUES in February 2023, with Shimano’s radical new approach seeing it replace Alivio, Acera and Altus, alongside select Deore components for flat-bar/mountain bike use, and the drop-bar iteration replacing Tiagra, Sora and Claris.
The apparent U-turn on the CUES idea shows Shimano has listened.
I asked about the new Tiagra and it stated: “We developed Tiagra R4000 to meet a clear demand from riders and OEMs (bike brands: original equipment manufacturers) for an accessible, 2x11 mechanical groupset that delivers a true road cycling experience.
"While CUES is highly versatile – designed for All-Road, Gravel, and bikes with wider tires – TIAGRA R4000 remains a dedicated "Pure Road" groupset. This distinction is reflected in its technical specifications, such as optimized chain stay lengths and front derailleur tyre clearance, which are specifically tailored for classic road bike geometry, aesthetics, and performance.”
However new Tiagra has come about, I’m very glad it has. Now it’s over to Shimano’s rivals, SRAM and Campagnolo, to offer an alternative to Shimano’s return to value performance road components.
