- Shimano Ultegra 6700 Hollowtech II Double Chainset
zoom Shimano Ultegra 6700 Hollowtech II Double Chainset
Shimano Ultegra 6700 Hollowtech II Double Chainset
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The HollowTech II 10-speed Ultegra chainset offers an ideal balance of light weight and stiffness, making it the perfect choice for both enthusiast and competitive riders.
Top Features of the Shimano Ultegra 6700 Hollowtech II Double Chainset
- Industry leading HollowTech II cold forged hollow crank arms have been evolved to increase rigidity, reduce weight and improve strength
- A wide range of chainring options and crank arm lengths are available to meet the needs of all riders and racing disciplines
- HollowTech II integrated bottom bracket uses a wider bearing placement and larger axle diameter for increased stiffness and efficiency
- HollowTech II integrated bottom bracket seal design has minimal bearing interface ensuring smooth rolling and increased durability
- Weight including bottom bracket 785 grams"
- Bottom bracket cups sold seperately
|Bottom Bracket Type:||Hollowtech II|
HollowGlide hollow outer chainring gives vast improvements in rigidity by virtually removing outer chainring flex and hugely improves shift performance, even under high load.
The chainring teeth have been developed to work in conjunction with the CN7900 and CN6700 chains for increased contact to provide greater efficiency and improved power transfer.
A highlight in the new chainset is it's HollowGlide technology. A hollow-forged outer chainring provides a major reduction in weight while delivering higher rigidity at the same time for optimal power transfer and even better shifting performance.
Your chainset must fit onto your bottom bracket! There are currently four chainset/bottom bracket interfaces that you're likely to come across. If your bottom bracket is made by Shimano and it has splines, then you need an Octalink chainset. If your b/b is NOT made by Shimano and it has splines, it's almost certainly ISIS. There are a very few non-Shimano chainsets with Shimano Octalink interfaces so, to be sure, count the splines - ISIS has 9, Octalink has (surprise, surprise) 8. No matter which brand of b/b you have, if it has a square interface, it will require a traditional square taper chainset. If you have one of the new Hollowtech II systems, you will need to choose the exact chainset that matches your bottom bracket. Most MTB chainsets are now 9-speed compatible but these will work with an 8-speed system.
About the Shimano brand
Shimano are the makers of the world's most well known cycle component brand. Established in 1921 when the first cycle freewheel was forged. Shimano produce drivetrains, wheels, pedals, shoes, cycling clothing and pretty much every Shimano cycle accessory you can think of! Famous for their top end products ridden by the pro's, Dura-Ace and XTR, which cover both road and MTB's. At Shimano, they're doing everything they can to respond to heightened environmental concerns. Shimano are proud to be a producer of bicycle components that help people to enjoy outdoor sports and interact with nature through healthy non-polluting activities. In their 87 plus years of existence Shimano have accumulated a wealth of technology and product development and expertise that serves as the driving force behind their continually evolving product line.
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Magazine reviews for Shimano Ultegra 6700 Hollowtech II Double Chainset
Review from road.cc
Although it's great to look at new and shiny Dura Ace (and Di2) kit, it's always the announcement of the new Ultegra groupsets that generates the most excitement here at road.cc towers. Ultegra has always been the smart choice in the Shimano range: affordable enough to be a serious consideration with first dibs on all that innovation trickling down from the top.
Dura Ace 7900 was a fairly big leap in a market that mostly makes incremental changes, and Ultegra 6700 has stepped up a notch too, taking on plenty of the new technology at a price point that's much more within the reach of the keen amateur cyclist.Ultegra now has the hollowglide chainring of Dura Ace. It also shares the internal lever cable routing, the Carbon lever blade, redesigned hood shape and repositioned pivots on lever and brake. In fact there's not much that it doesn't have, really only the no-trim shifting of the front mech. So what's the performance difference between the two groupsets?
Hand on heart I'd have to say that blindfolded I'd be very hard pressed to tell the difference between the two. There's no real performance advantage to be had by buying Dura Ace kit over the new Ultegra, not one you'll notice out on the road at least. The new Ultegra kit is excellent: shifts are crisp, braking is noticeably better, power transmission is near faultless.
In the end it all comes down to weight: Dura Ace 7900 is about 300g lighter than Ultegra 6700. If you can honestly say you'd notice half a pound more kit hanging from your frame then you need to consider the top-of-the-line groupset. For everyone else, myself very much included, the smart money's with Ultegra. Forget the RRPs for a minute: In the real world 7900 is going to cost you a grand, and 6700 can be had for less than £600. For me it's a no-brainer: if you're a Shimano fan then Ultegra 6700 is definitely the groupset that gives you the most bangs per buck. Here's how we rate the components...
The most obvious difference between 6700 and the previous incarnations of Ultegra is that the new groupset shares the Hollowglide chainring technology introduced with last year's Dura Ace. Essentially this means the big ring is made from two sheets sandwiched together, with a void in the middle. Shimano tell us it's lighter and stiffer – isn't everything? – and it also improves the look of the chainset which has very smooth lines. It might not make you go faster, but you will feel a bit faster! Where the Dura Ace chainring uses two Aluminium plates the Ultegra chainset utilises a composite inner plate. We tested the compact 50/34 version, which runs on the now ubiquitous outboard bearings.
With Hollowtech II crank arms, a Hollowglide chainset and external bearings you'd expect the 6700 chainset to be stiff, and it is. Really stiff. No amount of jumping on the pedals could persuade the chainset to flex, it's an excellent pedalling platform. In conjunction with the redesigned front mech the shifts between the rings are nice and crisp; shifting up to the big ring particularly is an improvement. Shimano have been fiddling with the spacing between the two rings and they've added an extra millimetre of space between the rings on the doubles. That doesn't sound a lot but it means you get a greater range of gears available in the small ring without having to worry about chain rub. The only possible downside of that extra millimetre is that it means you need to buy a double- or triple-specific STI lever, which makes changing from one to the other a costly job. Best to do some some hard thinking if you're unsure.
The chainset is probably the place to talk about the finish, as it's the most obvious component. It's a sort of dark gunmetal grey, and it'd be fair to say that it's divided opinion a bit. My main issue is that the Hollowglide chainring doesn't quite match the spider, more in terms of lustre than actual colour, but some folks just don't like it. I expect they'll come round though, it's a bit different but you could hardly say that the 6700 kit is ugly, far from it.
Ultegra is the new amateur rider's benchmark for performance and price. Almost indistinguishable from Dura Ace in terms of performance, it only loses out on weight – but more than makes up for that in value for money.
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