Shimano Ultegra CS-R8000 Cassette
Shimano Ultegra CS-R8000 Cassette
The feature packed R8000 cassette is built on a rigid alloy sprocket carrier. This helps improve shifting performance while reducing weight. The R8000 cassette ensures accurate and quick shifts, even with the most demanding of gear changes.
- Hyperglide EV sprockets have been designed to ensure accurate shifting and reduce wear
- Hyperglide EV sprockets enable the cassette to be lighter
- Wide gear range to meet the demands of all riders, from road to gravel
- Designed for use with 11-speed HG-EV chains
- Weight: 232g (11-25)
- Note - 11/34 is HG800 (same quality as CS-R8000)
- 11-25T - 11-12-13-14-15-16-17-19-21-23-25T
- 11-28T - 11-12-13-14-15-17-19-21-23-25-28T
- 11-30T - 11-12-13-14-15-17-19-21-24-27-30T
- 11-32T - 11-12-13-14-16-18-20-22-25-28-32T
- 12-25T - 12-13-14-15-16-17-18-19-21-23-25T
- 14-28T - 14-15-16-17-18-19-20-21-23-25-28T
Calif_RoadieReplaced an old 11-32 that had been on there for about 3 years and the teeth were getting worn. This and a new chain has it running smooth again!. Merlin did a great job getting the items to us (Calif)
DavidExactly what you would expect from Shimano Ultegra, smooth gear change, well made, delivery as notified.
Scott LewisCompatible with the Shimano medium cage rear derailleur this offers important insurance on long, steep climbs.
Mr HamwoodIf you like Shimano componentry and climb lots of hills , the 34t version of this cassette is for you. It combines all of the quality Shimano provides with the lightness other manufacturers are unable to achieve in a 34t cassette.
Mr VreekenShimano Ultegra cassettes are in my opinion the best cassettes that a competitive cyclist can buy. Best of both worlds, with great lifespan and reduced weight over lower spec cassettes, without paying the exorbitant price of a Dura Ace cassette.
Mr WongConquer the toughest hill climbs on your road bike with this massive 34T cassette. Check your deraileur range and chain length before installing, deraileur extender may be needed.
ShaunGood price. As good as Dura Ace
DustinThe Ultegra cassette is a workhorse! Lightweight yet still durable enough to last 6000+ miles, especially when you stay on top of chain replacement. Shifting is noticeably smoother than the 105 model and the materials are for the everyday rider.
MJGQuality cassette from Shimano which most of the pro's use in preference to Dura Ace. Big range of ratio's and a great price from Merlin. These last and are 100% reliable.
Mr BROWNMassive range with the 11x34 cassette when paired with the medium cage mech. This upgrade may make you slower but your knees will thank you.
GarryLight and fast, and doesn't cost an arm and a leg like Dura-Ace.
Mr MachellTypical Shimano quality, and makes buying Dura Ace pointless. Great value
Mr ChuaNot much to say about these cassettes. Cheaper than Dura Ace almost the same weight.
Mr OsbournLoving the range this 11-34t cassette gives me with my 52/36 chain rings - plenty of range for up and downhill. I always huffed and puffed up some of the more challenging hills here in South Wales with the 11-28t and 11-30t cassettes I've tried before. The larger 34t big sprocket gets me up most stuff without completely draining my legs, so I'm going quicker for less effort - it feels that way at least.
AndrewThis cassette has been and will continue to be my go to for all my road bikes. Always smooth and quiet shifting. My only word of warning would be to be very careful of cross threading the lock ring. The threads are pretty fine and it would be easy to do some damage if you weren't careful.
Mr kongjunIt weighs a little more than 6800. I think the shift is good and the durability is better.
CarlA lighter and nicer looking cassette than the R7000 equivalent. Was considering wether to get the 11-28, but it's better to have gears you don't need than not have the gears you do. If you're wondering if you should get the 11-34, you probably should.
altofiendWorking perfectly. Not much to say that hasn't already been said!
John BGreat price for this and the chain in the bundle! Always reliable chain and cassette at the Ultegra level. Go Dura-Ace if you want to save some weight and sacrifice some longevity, but these work great for my racing.
frankGood quality gearing from Shimano. Easy to fit, pre oiled, ready to roll. Make sure you have a Shimano socket and chain whip to put on / take off!
BowenShifts as well as DA! A little more weight for a lot less money
RVHNo issues. I've been using 10sp Shimano cassettes for years and they shift flawlessly. 11-34 version comes with a spacer for use with 11sp freehub (other gear ranges do not), so don't lose/forget it when swapping cassettes.
stuzz552Went for the ultegra version for my good wheels to save a bit of weight over the 105 version which I also use. TBH, I can't see or tell them apart as both are excellent at shifting. If you want to save weight of around 30/40 grams then go for the Ultegra if not then get the 105 R7000
Mr PearceNice upgrade from the 105, combined with the Ultegra chain it provided a noticable difference in gear shifting.
Mr McNamaraVery good quality cassette. Im running this with Dura Ace for a bit of cost saving and not at all disapointed. I bought the 11-30 for a bit more high end for climbing and love it. The ratio spread on 11 speed is excellent, far nicer than the old 10 speed 11-28 cassettes.
DarrenGreat product from Shimano. Bought this to replace the one I had on the bike, like for like 11/25 as the other cassette had done over 20 k approximately and was showing signs of wear...
AndrewAs with most Ultegra components, this cassette is undoubtedly of high quality and specification, but with a high price tag. To my knowledge, Shimano only produce this range of gears in the Ultegra line of components. The cassette dismantles easily which was my intention: to create a hybrid cassette by removing the 15, 13 and 11-tooth sprockets from my current 11-34 R8000 cassette, and replacing them with the 16, 15 and 14-tooth sprockets from this. My plan has worked well - no longer do I wonder why I need a 50/11 ratio when I'm 100 miles into a ride! Service from Merlin has been flawless in all experiences I have had with them. Their online prices are generally very competitive, delivery efficient and packages secure. My recent contact with customer services resolved an error I made with an order immediately and with courtesy. Many thanks.
Mr scottChuffed with this as makes my 10 speed ZIP wheel usable, may be a touch heavier but well worth that price. good value as well.
Mr WONGDefinitely an upgrade in terms of weight and ease of cleaning compare to existing 105 cassette. Good value.
CharlesI changed over from a 11-28T because I rarely used the two smallest cogs. I'm also enjoying the closer grouping as I shift to the smaller cogs. Before I'd find myself either feeling I was spinning too much or grinding.
TimBrought the 11-30 to accompany the mid compact chainset as this suits all my riding conditions.
Mr bigwoodBig difference from the 105. Love it
marcusGreat 11 speed cassette. Lighter than 105 and cheaper than Dura Ace, a very good compromise.
Mr PuttickRepaced a Dura Ace 11-28 which lasted less than a year. This is heavier but will be more robust. I was worried that 30 teeth would be a problem but its good; close but works perfectly. On my winter bike, which has Ultegra gears, it is perfect. I think that if I wanted 32 teeth (which I dont) that would fit too. Seems significantly better value than Dura Ace.
Mr HollandNeeded the 11-34 for the bigger/lower gear range for my off road bike plus it's on 2 spiders where the 105/SLX isn't, so less chance of chewing my hub. Fits on a 10 speed MTB hub too, no problem. Merlin's price was even cheaper than the Germans and £14.00 cheaper than the UK's major online retailer...bargain.
MurrayNew CS-R8000 cassette is certainly an improvement on the old model, competitively priced. Nice and shiny too!
Mr AB RASHIDI upgraded from CS-5800 11-28T to this one. Little bit lighter than the earlier and climbing now not a big hurdle for me. Thanks to the 11-32T cassette.
StevenBullet proof and gives a silky change.
Mr RICEWhat can I say this is the go too cassette that is great for training and all around riding and gives good crisp shifting. Mine is 28-12 and only has one hole closer to the bottom which is okay cause I wanted it mainly for climbing.
Dr LewisThe 34 and 30 tooth sprockets are handy on poorly surfaced climbs. Works with my 6800 gs series mech. Yay!
BrendanI bought the 11-34 cassette to help my aging legs on 20%+ hills. Once I worked out what the extra spacer was for all was good. Paired with 105 5800 rear derailleur without any issue.
TorstenMatched with the semi compact crankset this cassette provides ideal range of gears for the flat bunchie while giving you spinning options when the gradients starts to head upwards
Mr ArslanVery very light. I bought 11-28 version, and can`t believe how durable but light it is.
Mr DunnThis 8000 is even smoother running than the previous Ultegra
PaulLight and cost efficient
JohnGreat product, great price! I climb a lot a hills here in Northern California, few years ago I went with a 11-32, the 11-34 makes the really steep hills a bit easier.
RobertArrived quickly well packaged and as per order. Installed on my bike and working well. Shifting gears is now a dream.
DavidCan`t fault the Ultegra cassettes, clean shifting and excellent durability. Bought this to replace a 6800 cassette which is only just starting to show signs of wear after 5 chains and 10000km. I wouldn`t consider any other product.
Neil SarreTop quality cassette. The 32 being very helpful for an older cyclist with knee issues to spin up the hills
BrendanFinish appears even nicer than 6800. Shifts beautifully with my di2 setup. Recommended.
Mr WeekesAgain smooth and precise. Lighter and an improvement on 105 cassette. Recommended.
Joel LExcellent value. I run the Dura Ace 9100 cassettes and now I`ve added a few of the Ultegra R8000 cassettes to my stable. I have multiple wheelsets and run numerous cassettes. The Dura Ace cassettes are great and a fraction lighter than the Ultegra. However, for the price of the Ultegra you`re getting almost 3-1 in terms of price. In terms of function, I`d say only the most discerning of individuals could pick the difference between the DA and the Ultegra in a "blind" test. It`s not discernably louder, shifts cleanly and crisply and in my opinion cleans up easier and appears brighter than the DA when clean. I`m a few rides in and there`s no meshing issues with the older chains. The functionality is spot on, which is why I keep coming back to Shimano Ultegra. On a cost per use basis, this is as good as it gets.
Mr FieldhouseFirst time out big improvement from the Ultegra 6700, quicker and smoother changing will definitely be putting on my other bikes also not as expensive as the Dura Ace
JonathanDid about 2500 miles on this and the Ultegra chain, rode it all through winter too. With regular cleaning and maintenance, I hadn't noticed that it had worn until the bike shop told me it needed replacing... Typical Shimano quality, smooth and silent shifting 90% of the time.
RobertAlways a great way to save a few bucks without sacrificing performance vs. Dura Ace
Mr RYANUltegra R8000 presents a host of real improvements over the already excellent 6800 series groupset, performing just as well as Dura-Ace 9100 at the cost of a 260g weight penalty.
TonyLove the 14-28 ratio for Winter, no annoying gaps in cogs
Mr ByardA bit expensive but seems to be quieter with smoother shifting especially under load.
AndrewWant an 11-30 cassette, but don't care for the cost of titanium and carbon? Same tooth design as Dura Ace, but all metal, and bomb proof