ShimanoUltegra CS-6700 10-Speed Cassette(Return to Product Page)

I have the 12-23 and have probably 10,000 miles on it, rarely going 150 miles or more without a thorough cleaning. Works great! I like the 12-23 because I can stay in my big chainring for all but the toughest climbs on my usual routes, and the middle few gears are only 1 tooth difference so I have that nice stair-step up and down the gears so I'm always in a comfortable cadence in nearly all riding conditions. Never feel like I'm in a gear too low or high.

heavy compared to my preferred dura ace unit not available in 12-30

When the road bike had about 16,000 miles on it, the shifting started becoming erratic. The chain would jump between gears on the rear cassette, and cleaning and carefully adjusting the rear deraileur didn't help. I replaced the cassette, the chain (which only had about 4000 miles on it), and the shifter cable, all at the same time. Now the shifting works fine, but I'll never know if it was the cassette, the chain, or the cable that fixed the problem. The cassette is well made and easy to install if you have the right cassette tool and chain whip, otherwise it would be very challenging. The next time I encounter shifting problems, I'll start by just replacing the cable before replacing the more expensive parts.

My old cassette was pretty worn so when I saw the Ultegra was on sale, I jumped on it. Great quality product at a great price....Thanks Bikeworks!

Used it for a hard TT climb where a 23 was too big, the 28t was great.

Finally gearing that is intermediate between Mountain and race. The 12-30 10 speed is perfect on my cross bike for some serious off road and touring rides. Shimano quality is also a big plus - quick shifting and durability is a given. I bought the cassette for a loaded tour and now use it to take on local MTB trails. It has made the cross bike more versatile and fun. I would recommended for adventure rides, steep road climbs and tours!

I've bought a couple of these now and they are pretty hard to kill. I couldn't justify replacing my cassette with the higher end ones that I seemed to kill very quickly. I put these on and honestly I don't notice any difference. They shift very well and have had pretty good longevity so far. I also have one on my cross rig and it has held up easily to a season of mud, dust, muck, and ice.

Bought this Ultegra cassette to go wih my new wheelset. I concur with claim that is better shifting. It is very smooth and precise.

Also, enjoying the new wheelset. They are lighter than my old Mavic wheels. They roll better, ride better and give me the option to go tubeless in future.

This is a great option especially with the extended gearing range of the 12-30T cassette. I run it with a 105 rear derailleur (the newer 5701 series, short cage and older 105 derailleurs won't work) and it works great. It keeps humming along no matter what rain, mud and road salt I throw on it. Obviously you'll get the best results if you keep it clean.

Use this cassette on our tandems and single road bikes

I have a 10-speed road bike with Shimano Ultegra components. The cassette range was 12-25. Both my daughters live in areas that are quite hilly and I started to feel that I needed a little help every once in a while. I decided to try this Shimano Ultegra cassette with a range of 12-30. Switching the cassettes was no problem. Shifting is still perfect. I did not have to increase the chain length or purchase a long cage derailleur. Everything feels great. I sometimes miss the 16 tooth cog but it is not much of an adjustment to make for my pedaling ability. I am extremely happy with this purchase.

I do road bike only for training use and I love it. have the 38-11 and I like how works.

I decided to try a slightly larger cassette at it's made climbing steep hills much easier. This cassette was easy to install and works great with my Di2 system.

used on gravel bike that is used year round in Minnesota with a variety of terrains and climates, Ultegra cassettes have never failed to deliver smooth gear changes regardless of the ice, sand, mud, snow conditions exposed to.

It is a cassette. Not much more can be said it is reliable

Smooth and precise shifts are the norm when used with a SRAM Red derailluer on my road or gravel bike.

Great option for an extra wheelset

11-28 good compromise and does not need longer derailleur cage, Ultegra quite light

almost 1 oz lighter than previous version, so quite light. Dura Ace is a waste of money for 99% of riders in my opinion.

chose 11-28, versatile, no need to change to long cage derailleur, I use with compact in front (road bike) and mid in front (tri bike) hilly here and I am not young.

I was looking for one more lower gear for hills and this did exactly what I needed. As usual Shimano parts work great.