The Japanese brand Shimano offers a wide range of groupsets – starting with Claris and Sora, which you’ll find on entry level road bikes. Tiagra is the next step up, followed by Shimano 105 which is typically specced on bikes costing upwards of £1000.
Shimano 105 is considered Shimano’s first performance groupset, and for many people it is the best option in combining performance, value and longevity. Ultegra is next and is very similar to Dura-Ace in terms of performance, though Dura-Ace is lighter. You’ll find Ultegra on bikes from around £1500.
Shimano currently produces Ultegra and Dura-Ace in electronic versions, denoted by Di2, and newer Dura-Ace, Ultegra and 105 models now come with disc brakes.
You can find all of these products from Shimano on Freewheel.co.uk, a great way of shopping online but still supporting local bikes shops
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