Much better than the Tiagra cassette that came with my Tarmac. It shifts quicker and it's lighter. The cassette and chain combination is also very quiet. The 12-30 cassette works fine with my 105 short cage derailleur except when I'm in the large chain ring (52T) and large sprocket (30T). When I back pedal the chain skips down to the smaller sprockets. All other gears are perfectly fine when pedaling forward and back. I'm not a mechanic so I need to figure out how to solve this one or I just have to live with it. Merlin has the best price on the Internet for this cassette and chain.
More than just a bit of bling, this is the highest quality, cleanest shifting cassette and chain before you disappear into the 'silly money' stratosphere. The cassette is incredibly light, but there's nothing insubstantial about it. Not cheap, but if you want serious, light kit, this is the biz.
Good value package deal for the annual service items, usually manage 5000 miles from one of these
The Ultegra 6700 cassette and chain is everything you would ever need from a draivetrain. Durable, light and precise.
Cassette and chain arrived as per description, fitment was very easy onto Shimano RS80 wheels I purchased at the same time.
Shifting appears very smooth and fast (upgrade from 105).
Definitely a great value cassette and chain package.
Easy to fit and install. Looks great, changes are smooth and quiet, sure it will be reliable. See no reason to spend a lot more to save fractions of weight when this is such a good price.
Very good value combination of essential transmission spare parts. Excellent quality Ultegra 10 speed parts. Very prompt delivery by Merlin - thanks again.