Shimano has a new drivetrain on the market, but it's not exactly what we'd been expecting from them. It's not wireless, 13-speed, or AI-controlled - it's an 1x8-speed drivetrain called Essa.
Essa is compatible with Shimano's current 8-speed systems: Acera, Altus, and Tourney TX. With 409% gear range, it's certainly less than their 12-speed variants' 510%, but the gearing could still be optimized for mountain biking. The RD-U2000 derailleur's short little cage can handle up to a 45-tooth sprocket, and the CS-HG400-8 cassette has a range of 11-45 teeth.
The gear range falls short of most 11-speed systems, which check in around 418% (Shimano) or 420% (SRAM). The range is larger than other 8-speed systems, like Microshift Acolyte.
This is not a CUES drivetrain, so it doesn't utilize the newer Linkglide tech we've been a fan of. It instead relies on the Hyperglide tooth profile, and will use an 8-speed chain from that lineup. You can use a Revo grip shift, shifter/brake lever combo, or a standard Rapidfire shifter with the derailleur - I'd strongly recommend the third option.
Aftermarket pricing is available, though it's hard to imagine the parts being regular stocked at every local bike shop. The breakdown is as follows though, in case you're keen to put a groupset together.
Cassette
CS-HG400-8 $34.99
Chain
CN-HG40
$12.99
Crankset (no BB)
FC-U2000-1 $39.99
Derailleur
RD-U2000
$43.99
Rear Shifter
SL-M315-8R $33.99
That means that for around $160 USD, you can have a robust little drivetrain with maybe just enough mechanical advantage to climb everything you want to.
This isn't the only new product wrapped up in this little release, we also have some new shifters for the Cues family of drivetrains. These new shifters are focused at the smaller-handed members of the mountain bike world, with reduced reach and improved ergonomics.
It can be hard to set the controls up on a kid's bike in a way that actually works for little hands, so it's nice to see the effort made on the brand side to address the challenge.
There are three models available, suited to 9, 10, and 11-speed CUES drivetrains.
ESLU40509RAP
9 Speed
$22.99
ESLU605010RA1P
10 Speed
$28.99
ESLU605011RA1P
11 Speed
$32.99
No news yet about any newfangled 12-speed offerings, electric shifting, or the like. We've been waiting for something new on that front, and it seems we'll continue to do so for a little while yet.
I had a full Advent X drivetrain. The short version, is that it was not reliable for me. I had less than 300 miles on mine when I tossed it. Specifically I think something went wrong with the clutch. Shifting got INCREDIBLY stiff/difficult. I'd tried to service the clutch, the shifter had already been replaced, and faced with needing to buy another derailleur, I decided to bail.
I really wanted to like it, I like less speeds, and the weight/price of the Advent X cassette was great for what it was.
I went to Deore 11speed (the super heavy ~650g steel 51-11t cassette), with an XT shifter, and things have been better since then (although the shimano derailleur clutch needs fairly frequent servicing).
I've been running 8spd Microshift Acolyte for over 2 1/2 years now. Bombproof and cheap, 12-46, and it has a clutch, unlike this set-up.
Dérailleur, cassette, shifter and chain cost under £65!
I decided to get a wide range Deore 10sp cassette and mated it to a Saint shifter. SOOOOO much better.
Maybe I just had a dud, but I don't get the hype about the Microshift stuff.
My other bikes have/had X01 eagle 12spd and XTR 12spd. EX shifting isn't as precise but punches way above it's weight.
And more than 12 gears we just needed some bigger cogs. I loved 11 speed and can't say a 46t cog ever stopped me going up something, nor has a 10t cog done me a bit of good. I do appreciate the 51t ... but now we can have them on regular old hg freehubs.
So much this.
These wide range cassettes for 8-11 speed drivetrains are awesome for a whole segments of users, except one thing.
They often weigh a TON. I’m far from a weight weenie (my Banshee weighs 40lbs), but I’d totally be interested in a 9/10/11 speed XT class cassette that uses microspline, still has good range (10-45t, 10-48t, maybe 10-51t, all of those would be fine options), and that didn’t weigh 650g+.
Right now Garubuk is one of the only options for that, with their cassettes weighing in around 300-330g, and costing ~$300.
Sort of works, but the jump between the easiest two cogs is fairly large (37 - 46). Plus it would be nice to have it use the 10t (that requires either microspline, or XD) for more total range.
Maybe one of these days I'll give it a try.
The Shimano 11sp M6000/7000/8000/9000 generation of rear derailleurs are not officially supposed to work with 10sp, but in mine and many others' experience it works well enough. And while officially only rated for a 46t max cog, it will get to 48t with minimal issues and many have been able to stretch it to 51t depending on your rear derailleur hanger geometry and chain growth on your rear suspension design.
Super helpful. I wasn't able to determine this at the time, so I replaced the whole shebang.
But I've still got the Advent X cassette sitting on the shelf in the garage. I'll totally try this at some point in the future.
Any idea of other brands 10 speed shifters work?
This is how I set up my 10sp 11-46t Deore cassette with 11sp SLX derailleur and Saint 10sp shifter. Buddy of mine has the same setup but uses an 11sp XT derailleur instead. It's a great setup, and if you have an Advent X cassette already you can use the same premise (and I did this with the Advent X groupset I have, swapping Shimano/Microshift parts in/out to experiment, but I just thought the Shimano stuff was better in general).
Compared to SX/NX Eagle, or Deore 11s, its over 200g lighter though .
Shimano: Never mind, here's another drivetrain which is not compatible. Enjoy your extra SKU's people!!!
I wonder why not? Different development teams each doing their own thing? What a mess.
"9th gear, sir"
"Granny gear, no worries!"
Maybe some random words of encouragement like, "Good on ya!?" "You little ripper!" "Time to crack open a tinny!"
I run 10-42T SRAM cassette with 30T chainring on Shimano 11s XT and feel that's the perfect balance of range and longevity. Any steeper and I should hike the bike with this gearing. (27.5 rear wheel, 170mm cranks)
cogs : 11-13-15-18-22-27-35-45T
Jumps: 8% 5% 22% 23% 30% 29%
Wow, those last two jumps are big.
Correct me if I'm wrong but -
What we feel is having even jumps in gear ratio, not in tooth count%. Gear ratios are # of front teeth/# of back teeth. Since these are back teeth, it's the difference in the reciprocal of these numbers which matter
The gap from 11 to 13 is 1/11-1/13 = 0.014
The gap from 35 to 45 is 1/35-1/45 = .006.
So even though the last jumps are the biggest in tooth count, the jump in gear ratio is the smallest. In between, the jumps are mostly around 0.010 but not exact (hard to do b/c they gotta span a huge range, and they can't have fractions of on tooth)
Personally I like having smallest jumps near the lowest gear - I'm probably doing seated spinning where cadence matters, vs on the top end I'm probably standing anyway
But as @tacklingdummy says, they've optimized this cassette for city use, not MTB. That probably is the correct choice for the price range.
And so I see I fell into one of the common PB commenter mistakes: assuming oneself to be the target audience of every product ever released.
Given that the jumps are actually decreasing throughout nearly the entire range (I did the math again to correct myself earlier - the gaps are [0.0140 0.0103 0.0111 0.0101 0.0084 0.0085 0.0063]), the entire low range is already the tighter-spaced end, so I don't necessarily think this is optimized for city use as @tacklingdummy says
Anyways, I'm glad we're fortunate enough to have so many products to choose from
yes, but a clutch good chainring tooth profile is still better.
Great for MicroShift cuz otherwise this would likely eat right into their market (still might do it tbh). But if it only has 'decent' spring tension, I'd rather have MicroShift's clutch system. Or just CUES/Deore
sunrace.com/product/rdm900-md
sunrace.com/product/csm993-9az
With 170 cranks I need a 50 cog, (with 29 rear wheel). I could go 45 but then I'd need 175 cranks, (or a 27.5 rear wheel).
The big drop in chain width and strength happens when you go above 8 speeds so there's that too.
Nice work Shimano, keep whoever is coming up with the this stuff on staff please!
If that's what you expected from Shimano, you haven't been paying attention for a long time. They don't roll like that, never really have. The closest thing I can think of to just chucking shit at the wall to see what sticks is the DualControl MTB brifters from 15 years ago!
The claims from microshift were: easier gear changes (less force required), compact derailleur for smaller wheels, and a clutch for the rough stuff....
After buying the set.... the mech is considerably bigger than a Zee derailleur, more force required at the thumb to change to an easier gear with more stroke required, and the clutch requires an allan key.... and at the same time did very little.
Overall it did everything worse than a Zee setup and cost just about the same (Deore shifter/cassette etc....)
I had high hopes, but were crushed in every conceivable way.
14-16-18-21-24-28-33-39-45-51T
I'd buy that in a heartbeat.
My 6yo uses the indicators to figure out which way she is shifting relative to how it "feels" in terms of effort.
Never been an issue in all the years I've been on an MTB. And 1993 was quite awhile ago.........
It's also why SRAM spent so much time trying to replicate the trigger shifter feel on AXS. Yes, you can adapt to Blip buttons and other styles of shifter operation, but it takes time.
For new riders, there are a lot of other muscle-memory type things they are focusing on - braking, turning, balance, pedaling, situational awareness, traction, etc.
The worst is the Dura AceDi2, I hate those. And also hate batteries.
Problem is they-re limited to HG & XD drivers. So spinout is still a real risk if you're HG & depending in where you're riding. I'm climbing extended tech single-track with 11spd. 28T ring & 11/46 SR cassettes - and find that I'm giving up little to nothing, compared to my 12spd 30T & 10/50.
I love the more even steps between cogs, and have found the SR cassettes to outlast any Shimo unit I've worn out. Tho chain-grade makes a huge difference here, too.
If you're shopping - give SR a shot. It's not a cheap experiment - but doubt you'd be disappointed. Newer cassettes have extended their grannies to 51T cogs. Tho they're all HG as near as I can figure.
BTW - I'm running GX drivetrain w/X01 chains on both my HT & FullSus 11spds. Absolutely no issues with the derailleur & 11/46 range. Both units are rock solid & reliable shifters acriss that range. Haven't tried the 51T options. Wish my GX 1x12 worked as well