Shimano’s new Tiagra 4700 groupset looks much more like Shimano’s higher end groupsets than its predecessor. Gone is the “dinnerplate” chainset, in favour of a new four-armed design which looks much more like the offerings in the 105, Ultegra and Dura-Ace ranges. It is available in 50/34 compact and 52/36 semi-compact versions with crank lengths of 165 to 175mm as well as a 50/39/30 triple.
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We’ve got in the 50/34 compact version attached to Raleigh’s new 2016 Criterium Sport aluminium bike. Raleigh claims that the £750 Criterium Sport is the first bike available in the UK with Tiagra 4700.
The other major visible change is in the shifters which have lost their gear indicator windows and also look much like Shimano’s higher end groupsets. Gear cables have followed the brake cables under the bar tape, rather than coming out of the side of the shifters – again like the higher-end groupsets.
Gearing remains ten-speed rather than being promoted to the eleven-speed of 105 and above. The double set-up will take a largest sprocket of 34 teeth whilst the triple tops out at 32 teeth. Shimano quotes a smallest sprocket of 12 teeth for this set-up. The Raleigh comes equipped with a SRAM cassette which has a range of 11-32 sprockets. The rear derailleur comes with a long cage to allow it to handle the wider range options.
The front mech has been redesigned with a longer cable arm to provide more leverage and lighter shifting option, which again reflects the design of Tiagra’s stablemates. The new 4700 Tiagra brakes also bear more than a passing resemblance to 105 and Ultegra and Shimano claims lower friction within the calipers, a 30% increase in braking power and better modulation relative to its predecessor.
Overall, despite remaining ten-speed, Tiagra 4700 has much more of the look and feel of Shimano’s higher-end groupsets. We’ll report further once we’ve got out on the road and seen if it matches them in performance.