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Shimano GRX ST-RX810-LA dropper post lever, left hand



The best way to control your drop-bar dropper, bar none
Allows dropper actuation without affecting your grip
Free stroke and reach adjust
Only £30 more than standard lever
Different hood design to GRX 400/600-series
Expensive as a standalone upgrade
269g Recommends

This product has been selected to feature in recommends. That means it's not just scored well, but we think it stands out as special. Go to recommends

At every product is thoroughly tested for as long as it takes to get a proper insight into how well it works. Our reviewers are experienced cyclists that we trust to be objective. While we strive to ensure that opinions expressed are backed up by facts, reviews are by their nature an informed opinion, not a definitive verdict. We don't intentionally try to break anything (except locks) but we do try to look for weak points in any design. The overall score is not just an average of the other scores: it reflects both a product's function and value – with value determined by how a product compares with items of similar spec, quality, and price.

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The Shimano GRX ST-810-LA lever is the cleanest, best-performing way to control your drop-bar bike's dropper post. Building on the tried and trusted GRX design and mechanicals, it's an expensive but a worthwhile upgrade for the long term.

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Anyone who's ridden a bike with a dropper post off-road immediately appreciates their value – being able to get your weight low and back dramatically improves stability, safety and control on technical descents.

With the advent of much greater tyre clearance, drop-bar bikes are being ridden up, down and along ever-more technical trails: enter the drop-bar dropper-post remote lever.

2020 Shimano GRX ST-RX810-LA GRX dropper post lever, left hand 1.JPG

Dropper posts on drop-bar bikes aren't new. For years I've ridden an externally-cabled 27.2mm mountain bike post, with a short length of zip-tie sticking from the actuator housing at the top of the seatpost collar. Rough terrain ahead? Reach down, pull on the ziptie, get cracking. This works fine, but does require taking a hand off the bars – not optimal.

Amongst the Gravelati there are hacks of SRAM DoubleTap front shift levers and other such shenanigans, but there was no bolt-on solution from the big players - unless you've just won the lottery, in which case the RockShox Reverb AXS dropper post can pair with an AXS front shift lever for wireless dropping.

2020 Shimano GRX ST-RX810-LA GRX dropper post lever, left hand 3.JPG

The ST-810-LA is for a 1x cable-actuated setup – if you want a dropper and a front mech you have other external switch options, such as the PNW Components Coast Suspension Dropper, while Wolf Tooth Components and Shimano's own PRO also offer drop-bar switches. These are all bar-clamped, though, and require some shifting of hands to actuate.

The GRX ST-810-LA is the only dropper lever in the GRX range, either 10 or 11-speed, and there's no Di2-compatible option, in case you were wondering. Being at the higher end of the spec it includes both free stroke (how soon the pads bite) and lever reach adjustment.

What's included

In the box you get an inner cable (thankfully non-coated) and the ferrules/barbs/olives needed for SM-BH90 hydraulic hose (not included). The bleed procedure is identical to other GRX levers.

2020 Shimano GRX ST-RX810-LA GRX dropper post lever, left hand 2.JPG

There's a hefty amount of cable pull (8.3mm to be exact), and this has no problem actuating my non-Shimano Tranz-X post. One point of note is that the cable head end goes in the shifter, so you need a seatpost that clamps at the post end.

Many mountain bike-specific posts feature a clamp at the lever end, where it's easy to install and adjust, so the reversed cable orientation might be an issue. Solderless barrel nipples ('knarps') that simulate brake cable heads are easy to find, at least, though if your post takes a smaller cable head it might take a bit of filing.

Alternatively, if you use a PRO dropper, compatibility isn't an issue.

> 26 of the hottest 2021 Shimano GRX bikes

The look and feel of the 810-LA is pretty much identical to the mechanical GRX levers, apart from the hood cover where the 810 gets a ribbed instead of smooth handgrip area. To be honest, I felt no difference between the two over some pretty darn muddy, wet and rowdy rides, though the look doesn't match.


The RX810-LA performs brilliantly, with plenty of power and modulation, whilst the grippy surface and contours of the lever give confidence in all weathers.

After a good few month's riding the dropper actuation is as smooth as new, with maybe a bit more lever throw required as the cable beds in. There's enough throw overall I haven't needed to retension, and I don't expect to anytime soon either.

> The best dropper posts you can buy for your mountain or gravel bike - tried and tested

It's no exaggeration to say that having dropper control and full grip is a game-changer for confidence and safety. You find yourself using the post a lot more. You don't pause when spotting obstacles, and at high speed it's sometimes nice to get your body a bit lower in the bike. These are not times you want to be fumbling for a small switch somewhere on the bar.


Now £210 is not a small amount to pay for convenient control if you already have a left lever, and the £30 premium over standard is more palatable as part of an initial GRX setup.

You can bag the 810-LA for as little as £145 online so shopping around can help dramatically. If you are speccing a 1x build from new it's a complete no-brainer to go for the 810-LA over a separate dropper switch.

As investments go the 810-LA is a pretty safe bet. The great design and build mean the chances of it breaking or wearing out are very low, and once you have such control you'll wonder how you ever did without. Highly recommended.


The best way to control your drop-bar dropper, bar none test report

Make and model: Shimano GRX ST-RX810-LA dropper post lever, left hand

Size tested: One size

Tell us what the product is for and who it's aimed at. What do the manufacturers say about it? How does that compare to your own feelings about it?

Shimano says: "For a streamlined cockpit and easy access to the seat dropper post lever, SHIMANO's RX810-LA dual control lever integrates the brake lever and dropper lever for fast and effortless operation."

Tell us some more about the technical aspects of the product?

Shimano lists:

Integrated cable pulling system

8.3 mm cable stroke

Control dropper post from shifting lever

Anti-slip brake lever


SERIES GRX 11-speed

Color Series color

Average weight 263 g

Brake lever specifications_Brake fluid_SHIMANO Mineral Oil SHIMANO Mineral

Brake lever specifications_Brake hose color (kit) Black

Brake lever specifications_Recommended brake caliper BR-RX810

Brake lever specifications_Servo wave mechanism

Brake lever specifications_Brake hose (Kit) SM-BH90-JK-SSR

Brake lever specifications_Funnel bleeding

Brake lever specifications_Hose joint Straight

Clamp band Steel

Clamp band_Inner diameter 23.8-24.2

Shifter type Single lever for adjustable seat post

Shift lever_Release Resin & Steel

Shift lever specifications_Front speeds 1

Shift lever specifications_SL outer casing_Lever side OT-SP41

Bracket cover color Standard

Rate the product for quality of construction:

Usual high Shimano quality.

Rate the product for performance:

Can't fault it; smooth and consistent.

Rate the product for durability:

It's Shimano – it'll be fine.

Rate the product for weight (if applicable)

Standard for a Shimano GRX lever.

Rate the product for comfort (if applicable)

The grip is very good.

Rate the product for value:

At RRP, aftemarket, it's a hefty bill. Buy online and discounts are meaningful.

Tell us how the product performed overall when used for its designed purpose

Can't fault it – perfect.

Tell us what you particularly liked about the product

Ease of installation and predictability.

Tell us what you particularly disliked about the product


How does the price compare to that of similar products in the market, including ones recently tested on

There's literally no comparison, as no other manufacturer makes a dropper post integrated lever. If you're comparing with AXS wireless, though, it's a bargain!

Did you enjoy using the product? Yes

Would you consider buying the product? Yes

Would you recommend the product to a friend? Yes

Use this box to explain your overall score

As a solution for cable-actuated droppers, it's a home run. It's only available as a top-spec 810-level option, though, meaning you're mixing with 400 or 600 and the cover look is different, but that's really the only issue. It's a fantastic nine.

Overall rating: 9/10

About the tester

Age: 47  Height: 183cm  Weight: 77kg

I usually ride: Sonder Camino Gravelaxe  My best bike is: Nah bro that's it

I've been riding for: Over 20 years  I ride: A few times a week  I would class myself as: Expert

I regularly do the following types of riding: cyclo cross, general fitness riding, mtb, G-R-A-V-E-L

Living in the Highlands, Mike is constantly finding innovative and usually cold/wet ways to accelerate the degradation of cycling kit. At his happiest in a warm workshop holding an anodised tool of high repute, Mike's been taking bikes apart and (mostly) putting them back together for forty years. With a day job in global IT (he's not completely sure what that means either) and having run a boutique cycle service business on the side for a decade, bikes are his escape into the practical and life-changing for his customers.

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casparbc | 3 years ago

Yes , best way to control a dropper , but why the hell didnt they make it so you can clamp the cable at the lever..... 99,9 pct of all dropper tdy need clamping at the lever , and now you have to remove bartape and lever in order to change cable and/or sevice your dropper....For this reason Ill stick with a standalone lever.....


KiwiMike replied to casparbc | 3 years ago

Clamping the cable at the lever end would have meant a complete redesign of the lever mechanism, instead of simply omitting the locking cam from the existing front mech lever. Given the size of the market and the fact they can easily do a clamp at the post end, that would be why. If the other is worn that needs swapping regardless. If the inner has failed and you have tight internal routing I can see that you'd need to lift the bartape to push the outer through the frame - but TBH that's a 5-minute job, and how often do inner cables fail? 

kil0ran | 3 years ago

How does it work? Does the whole lever swing inwards?

barongreenback replied to kil0ran | 3 years ago
kil0ran wrote:

How does it work? Does the whole lever swing inwards?


That was my question too!  A bit of a glaring omission  1

I was sceptical about dropper posts until I got my first mtb with one and now I'm a convert.  It's a great addition to have a little bit of extra control, especially as a taller rider where my high centre of gravity can make things a little more difficult.

KiwiMike replied to kil0ran | 3 years ago
1 like

Exactly the same as if it were a front shifter. It's the same mechanism, except Shimano leave out the ratchetty bits inside, so it just springs back once released. 

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