Shimano CS-6700 Ultegra Bicycle Cassette (10-Speed)

Cassette was as expected for Ultegra level quality. I was trying to decide between XT 10-32 cassette and this Ultegra 10-30 cassette. I am replacing an older Dura Ace 10-27 cassette. Looking for additional lower gear range. Dura Ace is super light. The XT was the heavier than the Ultegra. Decided to stay with Ultegra since I have Ultegra road group. Did not disappoint. Flawless shifting and smooth transition gear to gear. You will need cassette chain whip and cassette locking tool to remove and install the new cassette. Otherwise is very easy to install.

Here's a scenario: You go down to your LBS and pick up a bike off the shelf. "Wow, this is a great deal!" They tell you its a 105 bike and you are super excited to get a bike with great kit for a great price. You get the bike home and go for a few rides then a few weeks later start looking through specs to find out how you can make the rig faster (without training harder) Your local bike shop probably didn't bother giving you a full run down of every component so you go bike them on the Makers website and then you have this epiphany! "This isn't a full 105 bike or Ultegra (or what have you)" The brakes are actually a cheap Tektro variant, the crankset is probably something by FSA and the cassette in likely Tiagra. Now you know why your bike was so well priced. If you're smart you take the FSA crank off right away and post it on Ebay. hopefully you get $40-$50 and that can be plopped down for a new Ultegra crank that is super stiff and provides instant response. After that you tackle the rear Cassette and the jump from that Heavy Tiagra to Ultegra is immense. This Ultegra Cassette is fantastic. If you live where there are hills (10-15 degrees and up), you'll love this cassette. you'll be the guy laughing on group rides when your buddies on their fast racing bike with 11-21 cassettes or 12-23 cassettes are killing themselves out for the saddle crawling up big hills while you sit down and enjoy a nice casual stroll up the hill.

Of course the new chain slipped over the 2 very worn low sprockets (Dura-ace from 2008!) and this new cassette was the solution. works perfectly

I picked up the Shimano CS-6700 Ultegra 10-speed cassette to use on my Wahoo KICKR Pro trainer, and it’s been a perfect fit. Installation was simple — it mounted right onto the freehub body with no compatibility issues. The shifting is incredibly smooth and precise, just like you’d expect from Shimano’s Ultegra line. Noise levels are low, even during high-power intervals, and the gear spacing feels natural for indoor training. It’s also held up well through a lot of sweaty sessions — no skipping or uneven wear so far. If you’re running a 10-speed drivetrain and want your indoor setup to feel identical to your outdoor bike, this cassette is an excellent choice. Smooth, durable, and worth the few extra bucks over the lower-tier models.

Gearing is tight but feels good. Had to change the chain because of width. Everything syncs with the shifting.

I really like this cassette and it's a good upgrade to me from the 105 for this series. Genuine part and reliable crisp shifting

I was forced to switch to a double front from a triple due to a frame failure on my old bike, and even though the used bike I bought featured a compact crankset I still found it impossible to negotiate my old climbs without risking heart explosions and strokes. I also found that I could never quite find the right gear on the flats or gentle slopes--I was always slightly overtaxed or under-challenged with the 11-25 that came with the bike I bought. Then, I saw this setup on Amazon, and even though it was slightly more than I like to pay for a cassette, it was worth every penny! Not only am I back on the 12% grades, I also find that I have plenty of great gear combinations for all terrains. The big question everyone seems to grapple with on this item is if their rear derailleur can handle the 30 tooth cog. For me it was a simple swap out--no adjustments were necessary on my Shimano Ultegra short cage derailleur at all. I would point out that chain length is critical here. My first stab at it had the chain just slightly too long, and the idler cog did touch the cassette when set to the 30 tooth ring. I watched a couple of youtube videos on proper chain length, followed their suggestions, and everything fell into place perfectly. I couldn't be happier with this purchase.

perfect fit on hard to find item

さすがアルテ。高級感があります。ショップの対応も丁寧で、安心でした。また利用したいと思います。

Bien reçu ma cassette a vélo ,livraison rapide bon matériel ça changé mon vélo pour la montée formidable .Merci

3 words..:Great, Great, Great!!! Ok...some more words...buttery smooth. Wonderful! This fixed my very annoying chain skip and gave me a really excellent excuse to upgrade!

Just what I required as I struggled to find the same elsewhere. I didn't want to change the gearing on bike excellent

Cassettes are usually awkward to remove but easy enough to fit with the right tools. The Ultegra 10sp 11 to 28 tooth version is reasonably robust & light weight.