One of the best things about Shimano is its offering for all ranges of the bike. From the premium Ultegra and Dura-Ace groupsets to the entry-level Claris and Tourney groupsets, they have something for everyone. Generally speaking, the Sora groupset is often found on lower-end bikes and is a 9-speed groupset, available in both standard double and wide-range triple cranksets.
Tiagra is the next step up in the range, offering a speed more similar to the mid-range groupset. The Tiagra , however, has one-piece brake pads instead of higher quality brake cartridges.
This year, the Tiagra groupset added its own hydraulic brakes and levers, making it more similar to the Where do you live? Show all in Parts. Show all in Accessories.
Show all in Clothing. Show all in Turbo Trainers. Show all in Technology. Show all in Maintenance. Show all in Nutrition. Show all in Sale. Shimano 10 Speed. Show the differences. Excellent value. Based purely on rear mech prices and quality I find. Probably Tiagra? Perfectly functional. Edit; Tiagra also uses the HT11 bottom bracket system which is nice to have at the price.
Big difference is between Sora and Tiagra, Sora you need to reach up on the hoods to upshift, all the higher ranges have the double lever setup. They all work though. Although to answer the original question I ran a Sora groupset quite happily for thousands of miles. Road stuff all just works.
I currently run Ultegra which is very smooth. The speed version of Dura-Ace was at the same time the most anticipated and most predictable product launch of , and the most surprising. Anticipated because it was preceded by a year of leaks, patent and FCC filings and race appearances; predictable because both SRAM and Campagnolo had already introduced speed systems and Shimano has been making speed mountain bike components since ; surprising because there's no mechanical version of speed Dura-Ace, and also because Shimano introduced a speed version of Ultegra Di2 at the same time.
More of that later. Many of the new features of Dura-Ace arise from its main target use case: this is a road racing groupset. Shimano says pro riders were asking for higher top gears because peloton speeds have increased, so you can now choose a chainset with a tooth big ring.
Faster shifting is a marginal gain, but we can see how pro riders would want to be able to get into a bigger gear for a sprint as quickly as possible, or a lower one for a big climb. Having a rear derailleur that will accommodate a tooth sprocket means pro team mechanics no longer have to faff around to provide support riders and sprinters with very low gears for mountain stages.
Previously, mechanics would fit long-cage Ultegra rear mechs so that riders whose job was simply to get over the mountains rather than race up them could save their legs on the climbs. Losing the wiring between shifters and derailleurs similarly makes life easier for pro team mechanics. But Dura-Ace is also popular with affluent recreational riders and there are features clearly aimed at those users too. Increased brake pad clearance will help keep bikes quiet that don't get a pro mechanic once-over after every ride, and the larger shift button offset makes it easier to use the controls while wearing winter gloves.
Shimano's engineers say they've learned their lesson from the transition from to speed cassettes, which left many riders with collections of wheels that didn't work with the new gearing. They've also admitted that the previous Dura-Ace power meter had accuracy issues, as reported by specialist bike electronics journalists like Shane Miller and Ray Maker. Ray has an excellent piece on the new Dura-Ace and Ultegra power meters , in which Shimano explain that the previous problem was that the power meter gubbins technical term were just grafted on to the existing cranks.
This time, the power meter and crank design teams have worked together to ensure the power meter works properly. Dura-Ace Di2 uses a similar shifting design to Shimano's mechanical gear systems, but instead of pushing two levers, you push two buttons positioned next to each other. If you want to move two or more sprockets at a time, rather than swinging the lever further like you do with a mechanical system, you just keep the button pressed down.
Carrying over from the previous Dura-Ace Di2, R boasts extensive customisability of the shift functions through an app — see below for more on that. Buy Shimano Dura-Ace R Di2 if you want the state of the Shimano art and arguably the overall state of the art when it coes to shifting speed and customisability.
Read more: Shimano expert talks new Dura-Ace and Ultegra groupsets. Shimano Ultegra is the company's second-tier groupset, with all the features of Dura-Ace for a bit less money because Shimano uses less expensive materials and surface coatings.
It's long been considered the working-man's performance groupset, though you might argue that this new version, with its substantial price hike over its predecessor, yields that title to In the past Ultegra offered a wider range of options than Dura-Ace.
Now, both groupsets offer the same options and all the same headline technology. And like Dura-Ace there's no mechanical version — yet. Shimano hasn't said definitively that mechanical Ultegra will never happen and there's now a Moria-scale abyss between Ultegra R Di2 and , so we might see a mechanical speed version next year. Shimano isn't saying. In mirroring Dura-Ace Di2's technologies, Ultegra R Di2 gets two new features not previously seen on a Shimano groupset at this level.
Once the world's supply chain returns to normal, it's a good bet you'll be able to pay quite a bit less than that. That'll make these cranks an attractive option if Shiman has ironed out the bugs that affected the previous Dura-Ace power meter cranks.
The other new aspect to Ultegra is a suite of tubeless-ready wheels with full-carbon rims. Like the Dura-Ace equivalents they have 36mm, 50mm and 60mm rims.
This is the previous, speed version of Dura-Ace, which we're keeping here because there are still a few bikes in shops with it. The mechanical and Di2 electronic groups share the same chainset, brakes and other non-shifting components, but with Di2 you get switches on the brake levers, derailleurs with built-in motors and the battery, wiring and control box that ties it all together. The major new feature of Di2 is Synchronized Shift, a technology borrowed from Shimano's mountain bike Di2 components.
Rather than buttons controlling front and rear derailleurs independently, one pair of buttons moves up and down the gear ratios, making shifts at the front or rear derailleur, or both, as necessary.
There are two modes. Press one button and the gear will get harder to turn, press the other button and the gear will get easier. A new junction box is not only very tidy — it can be hidden inside the end of the handlebar — it provides wireless ANT Private connectivity to third-party devices. The system also offers a Bluetooth connection to phones and tablets running Shimano's E-Tube software so you can program the shifting behaviour.
You can personalise the speed of the shifting, the number of sprockets that will be shifted, and even control the rear derailleur with the left hand. An advantage of Di2 is the option of adding additional shifter pods, satellite shifters that can be fitted to the tops or the drops. There's an internal battery, which you can hide inside the seat post. Worried about it going flat? If your budget won't stretch to the electronic version of Dura-Ace, the mechanical version is by no means second best — it's still a superb ensemble.
The group offered one of the widest range of options Shimano has ever offered in road bike components, including a power meter, hydraulic disc brakes, a wider gear range and an increased selection of wheels. The group features new derailleurs too, using design features that originally appeared on Shimano's mountain bike parts to reduce the chance that the rear mech will get damaged in a crash. Just one rear derailleur will handle any gear system you choose, including the new cassette.
With the group Shimano adds a very tidy power meter to its collection. How tidy? You can see in the pic to the right that the electronics are barely visible. The inclusion of hydraulic disc brakes in the Dura-Ace line shows how completely Shimano has embraced road bike discs.
Previously Dura-Ace equipped bikes with discs had to use Shimano's non-series brakes and levers; now they match. If you're using rim brakes, the Dura-Ace calipers have been subtly redesigned so they'll accommodate 28mm tyres. Finally, there's a big range of wheels in the latest Dura-Ace line up.
The new C40 and C60 wheels have 28mm wide carbon fibre rims that are 40mm and 60mm deep, respectively. Buy Shimano Dura-Ace if you're racing or doing mega distances and you want the best mechanical shifting. If you want high performance without the hefty price tag of Dura-Ace, then Ultegra is probably the pick of the range. Since the update, the gap between the two has been narrowed, and the R incarnation looks an awful lot like the current version of Dura-Ace too.
You still get the carbon fibre brake lever as well like you do on Dura-Ace, and the cranks, brakes and derailleurs share the same design as Dura-Ace. Dura-Ace is really aimed at racing bikes, making Ultegra a more versatile groupset. With a range of chainring and cassette options, it can be fitted to all sorts of bikes, from racing cycles to touring and adventure bikes. R component weights are very similar to Ultegra The significant differences are in the shifting, which gets an Ultegra version of the Shadow rear derailleur from Dura-Ace ; the brakes, which have been shaped to make room for 28mm tyres; and the sprockets which now have an option.
0コメント