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Easton EC90 SL cranks (arms only)



Not the cheapest option out there, but you can't fault the stiffness or the looks

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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Easton's new EC90 SL Cranks form part of one of the latest fully customisable chainset options to enter the marketplace. It's pricey against some of the opposition, but you are getting a very stiff set of lightweight cranks.

  • Pros: Super-stiff; light
  • Cons: Quite pricey

Easton has used RaceFace's Cinch technology for these cranks, which gives you a modular system when selecting the front gears for your bike. You buy the cranks and rings separately, with options to be able to run 1x or 2x systems and swap easily between the two should the need arise.

> Find your nearest dealer here

We've got the Easton 52/36 direct mount spider option (review to come) to test with the EC90 SL cranks, and you literally slot them onto the splines on the rear of the drive side crank before screwing on the lockring using a standard bottom bracket tool. You get clear instructions included in the box for assembling everything, so any competent home mechanic shouldn't have any issues.

Unlike most standard chainsets, the spindle is attached to the non-drive side so once this is positioned inside the frame, the drive side is attached by aligning the splines on the spindle with those on the crank and tightening. Any side to side play is taken care of by the pre-load ring.

Easton_EC90_SL_Crankset_with _rings

In use, the cranks are very stiff, helped not just by their hollow carbon fibre construction, but also the larger 30mm diameter axle. Stamping hard on the pedals, I couldn't detect any flex whatsoever, although the Shimano 105 crankset these replaced isn't exactly floppy either.

Size options are the usual 170/172.5/175mm lengths, and give a Q-factor (the distance between the pedal faces) of 149mm including the pedal washers.

When it comes to money, the Eastons aren't exactly cheap. A similar setup that I tested from Praxis, its Zayante Carbon M30 Direct Mount chainset, costs £300 including the rings.

The EC90 SLs are £399.99 on their own, with another £159.99 for the rings and spider. That's an extra £259.98 for a saving of just 27g for the full setup.

> How to trim bike weight on the cheap

It looks a little better when compared to the Campagnolo Record Carbon chainset, which has an rrp of £479.99; the Easton setup is still £80 more, but you are saving over 120g.

The similar RaceFace Next R cranks are around the same price, though they are aimed more at the mountain bike market.

Overall, these cranks deliver everything you could possibly ask for when it comes to performance and looks, but they aren't cheap.


Not the cheapest option out there, but you can't fault the stiffness or the looks

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Make and model: Easton EC90 SL cranks

Size tested: 172.5mm

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?

Easton says, "The EC90 SL crank utilizes the Race Face Cinch technology which allows for direct mount 1x rings as well as direct mount 2x spiders, and industry leading versatility. Increasingly popular 1x setups have many advantages including weight and simplicity, although their major limitation is adaptability. A Cyclocross rider's ability to ride a course, then effortlessly change chainrings to their preferred setup is a major necessity that has, until now, been overlooked. Narrow-Wide chainring design has revolutionized the mountain bike world, effectively eliminating dropped chains and chain guides. Easton refines the design for larger ring applications with improved chain retention while reducing running noise and friction. Finally Easton launches a new line of low friction Bottom Brackets to complete the EC90 SL Crank package."

If you race many disciplines, the option to be able to change rings over makes a lot of sense.

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

Easton lists:

Hollow carbon construction paired with the highest grade aluminium pedal insert and spindle.

Cinch interface with a road specific 30mm spindle.

Road standard Q-Factor of 149mm and will fit every major road BB standard.

1x chainline optimized for increasingly popular 135/142mm rear disc bikes.

Built For - Road / CX / Tri-TT.

Size - 170 / 172.5 / 175mm.

Ring Configurations - 53/39, 52/36, 50/34, w/ Removable Spider.

Single Direct Mount - 40T, 42T.

Weight - 590g (172.5mm 52/36 w/o BB), 442g (172.5mm 40T w/o BB).

Chainline - 2x 43.5mm / 2x Disc 46mm / 1x 47mm

Q-FACTOR (with washers): 149mm.

Spindle Diameter - 30mm.

BB Options - BB86, BSA 68mm, PF30 68mm, BB30 68mm, BBright, 386Evo.

Material - EC90 Carbon.

Finish - Matte Carbon.

Rate the product for quality of construction:
Rate the product for performance:
Rate the product for durability:
Rate the product for weight (if applicable)
Rate the product for value:

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

Light weight and offer loads of stiffness, exactly what you want from your cranks.

Tell us what you particularly liked about the product

Easy to fit and loads of options.

Tell us what you particularly disliked about the product

The price will put some off.

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

Against other cranksets we've tested, it is priced quite high.

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

At the top end of the price spectrum but the overall performance, quality and customisation keep the score up.

Overall rating: 8/10

About the tester

Age: 40  Height: 180cm  Weight: 76kg

I usually ride: This month's test bike  My best bike is: B'Twin Ultra CF draped in the latest bling test components

I've been riding for: Over 20 years  I ride: Every day  I would class myself as: Expert

I regularly do the following types of riding: time trialling, commuting, club rides, sportives, fixed/singlespeed

As part of the Tech Hub here at F-At Digital, our senior product reviewer Stu uses the knowledge gained from putting well over a 1,000 products through their paces (including hundreds of bikes) to write in-depth reviews of a huge range of kit. After first throwing his leg over a race bike back in 2000, Stu's ridden more than 160,000 miles on road, time-trial, track, and gravel bikes, and while he's put his racing days behind him he still likes to smash the pedals rather than take things easy. Although, as he spends a fair bit of his time reviewing ebikes these days he's becoming an expert in letting the motor take the strain. He's also waiting for 23mm race tyres to make a comeback!

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