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Description
Shimano 105 Di2 R7100 12-speed Disc Brake Groupset - 170mm 50/34TLooking to upgrade your drivetrain? Then look no further. The new Shimano 105 Di2 R7100 groupset brings Di2 shifting to a new affordable pricepoint. With functions and tech inherited directly from their DURA ACE and ULTEGRA drivetrains, 105 Di2 is the culmination of years of research and development. Thanks to a shared Di2 platform, sophisticated ergonomics, 105 optimised gear combinations and an exceptional brake system, Shimano 105 Di2 marks a new
Looking to upgrade your drivetrain? Then look no further. The new Shimano 105 Di2 R7100 groupset brings Di2 shifting to a new affordable pricepoint. With functions and tech inherited directly from their DURA-ACE and ULTEGRA drivetrains, 105 Di2 is the culmination of years of research and development. Thanks to a shared Di2 platform, sophisticated ergonomics, 105-optimised gear combinations and an exceptional brake system, Shimano 105 Di2 marks a new era of affordable performance.
Going electronic also lets you shift lightning-fast under load – such as when climbing or sprinting, customise how you shift and change gear without performance loss. Wireless shifting brings a clean cockpit free of shift wires and ports. While the internal Di2 battery is concealed in the seat post or frameset.
The new 12-speed cassette is the same width as Shimano's previous 11-speed cassette, so the space between each cog is narrower. This means shifts so smooth you’ll barely notice them.
Key Features:
- Wireless Di2 Shift Levers for a cleaner cockpit with 3 year battery life
- Lightning-fast precision shifts at the touch of a button
- Revised STI ergonomics
- 10% extra brake pad clearance
- Battery life of up to 1000km between charges
- Fully customiable shifting via the Shimano E-TUBE app
- Total Weight (approx):3,067g
Groupset Includes:
- Shimano 105 Di2 ST-R7170 hydraulic disc STI Brake/Shift Levers (left + right)
- Shimano 105 Di2 FC-R7100 105 double 12-speed chainset, 170 mm 50 / 34T
- Shimano 105 Di2 RD-R7150 105 Di2 12-speed rear derailleur
- Shimano 105 Di2 FD-R7150 105 Di2 12-speed front derailleur, braze-on
- Shimano 105 Di2 CS-R7100 105 12-speed cassette, 11 - 34T
- Shimano CN-M7100 SLX/Road chain with quick link, 12-speed, 126L
- Shimano SM-RT70 Ice Tech Centre-Lock brake disc rotors (160/140mm) with internal lockring
- Shimano Di2 E-tube SEIS battery
- Shimano Di2 EW-EC300 charging cable - 1700 mm
- Shimano Di2 EW-SD300 E-tube Di2 electric wires (900/1200mm)
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4.8 ★★★★★
Based on 6 reviews
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Product Reviews
★★★★★ 5
Guided tour through a difficult work
Format: Paperback
For the non-expert reader of Plato, this is a very good text for working through Timaeus. Actually, it may be useful to expert readers as well, but I wouldn't know about that, being firmly situated in the non-expert camp. Though some scholars may take exception to certain parts of Cornford's translation and interpretation, for those of us trying to get through it for the first time and on our own, this is still an exceptional guide. By the way, for an alternative translation and interpretation, the reader may want to check out Kalkavage's translation (Focus Philosophical Library), it is very good (I would rate it 5 stars also) and has some extremely helpful appendices for understanding references to music, astronomy, and geometry.
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Reviewed in the United States on January 6, 2013
★★★★★ 5
Cornford's Plato Cosmology/Timaeus
Format: Paperback
This is an excellent and invaluable reference book for Plato's Timaeus. If you are reading Timaeus you MUST have this book. It contains line-by-line commentary, and also, most valuable, some very helpful illustrations (example: illustration of the human body as Timaeus explained it). I would, however, balance this book with other books that attempt to place Timaeus within the rest of Plato's works. I recommend, for example, Peter Kalkavage's Timaeus. There, he attempts to link Timaeus and Republic.
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Reviewed in the United States on February 8, 2011
★★★★★ 5
An Excellent Choice
Format: Paperback
Excellent introduction, notes and translation.
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Reviewed in the United States on June 8, 2017
★★★★★ 5
Five Stars
Format: Paperback
Professor Cornford's translation with running commentary is definitive.
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Reviewed in the United States on November 5, 2015
★★★★★ 5
Plato's dialogue about the physical world
Format: Paperback
The two biggest topics in the Timaeus are astronomy and the elements of bodies, which are constructed using triangles and the tetrahedron, octahedron, icosahedron, and cube. I would like to see a translation of the Timaeus that uses it as a way to introduce all the astronomy that appears in the dialogue. Introducing the astronomy does not mean just talking in words about spheres or the zodiac or the ecliptic, but actually explaining how these were used by astronomers. Cornford has much to say, but to someone who has not learned any Greek astronomy his commentary will be opaque and hard to use. I didn't know the astronomy well enough to readily understand Cornford's explanations. I plan to learn more classical Greek astronomy, perhaps using Evans'
, and then read Waterfield's translation of the Timaeus
.
Before reading this you should have read the Republic and know some classical Greek natural philosophy, mathematics, and astronomy. Although Cornford's commentary makes the dialogue staccato, I am glad for it because I wouldn't otherwise have understood much of what Plato says. The Timaeus and the Parmenides are the two dialogues of Plato that one needs commentary to understand; the Parmenides demands the commentary because so much of what is happening depends on the original language, and the Timaeus demands the commentary because of all the things the reader is supposed to be familiar with.
The following is a list of topics I kept while reading the dialogue: theory of Forms 27d-28a, 51a-52a; harmonics 35b-36b; time 37c-38e, 39b-e; vision 45b-46c, 67c-68d; space 52b; surfaces 53c; weight 62d-63e; sound 67a-67c; physiology 70c-79e, 80d-86a; antiperistasis 79e-80c.
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Reviewed in the United States on December 12, 2015
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