The Shimano Ultegra CS-6700 10-Speed Bicycle Cassette is crafted with a rigid alloy sprocket carrier for a more lightweight, durable profile that enables smooth, more efficient gear shifting.
This innovative upgrade on Shimano’s classic 660 and SL versions features reduced weight, ni-plated Hyperglide sprockets with improved teeth shaping and revised ramps for smoother, quicker and more accurate shifting.
For more information on how to keep your bike running smoothly, click here to see PBK's expert advice on taking care of your chains and cassettes.
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Where reviews refer to foods or cosmetic products, results may vary from person to person. Customer reviews are independent and do not represent the views of The Hut Group.
I recently bought two of these Cassets from ProBikeKit and after only a month or so of use both are completely rusted. I have had the same Ultegra and Dura Ace Cassets on both my road and TT bikes for years with no issues. I decided to rebuild the drive train on both and have had both cassets rust out on the same timeline with the same quality care, (no water, and I haven't even had a chance to wash the bikes yet since they have not been ridden but a couple hundred miles) It is really strange I would say. it is almost as if these are fake Shimano Cassets the way they rusted through so fast. I will be putting my originals back on.
Upgraded wheelset needed another cassette. Perfect upgrade that does wonders for a great ride.
The best price on a proven part.
This is a very good cassette with excellent build quality. I would recommend this cassette for anyone who wants low gears.
Can't find a better price for the Ultegra 6700 cassette. Shipping a bit slow to the U.S., but we'll worth the wait. Great product, good shifting. Wonderful company.
Great buy as usual and great service
Have used 11-28 and 12-30 Tiagra, 105 and Ultegra cassettes on two bikes over the past few years. I definitely like the Ultegra cassette the best. Shifting performance definitely improved with the Ultegra cassette and the difference in weight in the driveline is noticeable. For the small price difference, Ultegra is definitely the way to go for a replacement cassette unless you're trying maintain a super tight budget.
Still using the original after 13,000 miles and 2 1/2 years. Know it should be replaced based upon that, but no sign of any necessity to do it yet.
This is a lower gearing then my last cassette and it makes a big differance. The cassette shifts smooth and quite, I have about 200 miles on it and found no problems.
It's a Shimano ultegra cassette so yeah its good! I got the 12-25 to replace my 11-25 and I really like it. Having the 16T is great and shifts smoother through the bottom. I really don't miss the 11T I just spin up the 12T and get in a tuck when going downhill and I am going about the same speed.
I've run ultegra cassettes for years and they are just asas good as dura ace but cost half the price. Smooth and quiet. Can't go wrong. PBK shipped it out fast and I received it in a reasonable amount of time considering I'm in the USA.
Awesome cassette that enables my legs to last much longer on climbs. I can now big ring a lot of things and no need for more shifting!
This is for sure a little piece of excellent engineering. It is substantially lightweight comparing it to the top of the line similar products. Easy to clean, very quit shifting operation… at a bargain price. Love it !!!
I love the smooth,fast and quiet shifting. It also runs very quiet. Overall a great product, especially at PBK's low price.
Living in the Prairie State of Illinois, it's more important to me to have a road cassette that lets me dial in my cadence than to have a wide range of gears or shave off the last few grams. The CS-6700 12-23 is one the few Shimano/Sram 10 speed road cassettes that includes an 18 cog, which turns out to be pretty important for performance and longevity. Each shift from 19 to 18 to 17 increases your workload by 5.5 to 6%. Moving from 19 to 17, you need to work nearly 12% harder for a single shift. More practically, your cadence at 20 mph changes by 10 rpm vs only 5 rpm with the 18. When you replace a cassette, it's usually due to the wear and tear on few, highly used cogs. Whether you run a standard (53t) or compact (50t) chaining, you'll spend a lot of time in the 17-19 range if you typically ride at 18-22 mph and pedal at 80-95 rpm. That 18 can extend the life of the cassette by reducing time spent in neighboring cogs. A trade-off to the tight cluster is losing the 11 cog. With a 50 tooth chainring, the 12 cog can get to about 33mph at 100 rpm. Rarely do I need more torque or speed than that. But for those occasional sprints and descents, the 11 would add another 3 mph at the same cadence, offering a bit more speed before spinning out. This Shimano cassette runs as smoothly as the SRAM PG-1070 on two of my bikes with otherwise Sram Rival drivetrains, so no compatibility problems. Overall, it's a great solution when finding the right rhythm is more important gearing up for climbing or racing
Nice step up from 5700. Clean shifts, quiet run. Best price & great service from PBK - as usual.
I think the Ultegra cassette is a great value compared with the more expensive cassettes. Keep a good chain on and change it out before it gets stretched and your cassette will last a long time.
Great product at excellent price. The only reason for 4 stars instead of 5 is the prolonged shipping time
With CN6701 this cassette is a great combo. Smooth/easy sailing with chain and shifters. I shouldn't have waited so long to upgrade. Thanks Probikekit for your prices too, nothing was close
This is one of the best all-round lightweight cassettes out there. The Ultegra cassette is more durable than the top of the line Shimano Dura Ace, and at a negligible weight penalty. Your price can't be beat. Thank you. Skyman