Shimano GRX Mechanical Bike

Regular price $5,555

Our best value in a Shimano-equipped ABLE is our GRX 820 build. You save significant cost by foregoing electronic shifting and going with traditional mechanical shifting instead. Shimano is the industry leader for drivetrain reliability and in the tried-and-true mechanical shifting configuration, Shimano is unmatched for “set it and forget it” precision. The GRX 820 drivetrain has been upgraded to accommodate the massive range of their 12 speed mountain cassettes with a 10 tooth small cog and 51 tooth large cog.  This positions GRX 820 with the same gear range as the infamous SRAM AXS 'Mullet' build but at a more affordable price, and the advantage Shimano's unparalleled shifting performance.  

The ABLE is a high-performance off-road machine that tilts more towards the “mountain skinny” side of the gravel segment. It prefers a big tire but keeps a short rear end - in fact, it’s shorter than the ECHO at 420mm. This is achieved by the most striking feature on the bike - the elevated drive-side chainstay.

Getting a chainstay this short with high tire volume is a packaging exercise because the chainring, chainstay, and tire all compete for space behind the bottom bracket. On mountain bikes this problem is addressed by widening the bottom bracket -- but that affects Q factor in a negative way. When we made the decision to make the ABLE 1X-specific it opened the design envelope and ultimately led to the decision to elevate the chainstay. By moving it up and out of the way we could make it extremely wide resulting in an incredibly responsive ride.

While our award-winning ECHO is a Swiss Army knife for a majority of mixed surface riding, when the path gets rambunctious its road-racing genes might seem lacking. We found ourselves on occasion wanting a bike that was equally engineered, but felt more at home on steeper, rockier and more rugged terrain. It was from this desire that the ABLE was born. It’s lightweight, tight, durable and agile. You can point it in any direction and go.

The ABLE begs to be ripped around on singletrack, fire roads, hardpack dirt, and chunky gravel. Proven on the brutal roads of the 2019 Dirty Kanza where ALLIED athletes piloted their ABLEs to overall victory.

Key Features

700x47 (or 650x55) front and 700x43 (or 650x47) rear
2x Downtube, Seat Tube and Top Tube bag (or 4th bottle)
420mm length, elevated on the drive side
Purpose-built for 1x
Geometry optimized for gravel and other off-road riding with a headtube angle of 71 degrees and a trail of 66mm for most sizes, with a stack slightly taller than the Allroad and Alfa Disc

Build Kit

Shimano Ultegra BB-R60 Threaded
Shimano GRX BR-RX810
Shimano XT CS-M8000 11-42
Shimano Ultegra CN-HG701
Shimano GRX FC-RX810-1 40T
FSA Adventure Compact
Arundel Gecko
Shimano GRX RD-RX812
Ergon SR10 Sport
FSA Energy Alloy Seatpost
Shimano GRX RX-ST810
FSA Energy SCR Stem
WTB Resolute 700x42 TCS 120tpi SG2
Industry Nine 1/1 GRCX

Sizing Guide

Crankset 170 172.5 172.5 175 175
Handlebar 40 40 42 42 44
Stem 80 90 100 100 110

Frame Geometry

A. Headtube Angle 70 71 71 71 71
B. Seat Tube Angle 74 74 74 73.25 73.25
C. Head Tube Length 120 143 160 180 200
D. Effective Top Tube Length 531 544 553 576 591
E. Seat Tube Length (c-t) 470 520 540 560 580
F. Chainstay Length 420 420 420 420 420
G. Stack 533 559 575 597 615
H. Reach 376 382 387 396 405
I. Bottom Bracket Drop 70 70 70 70 70
J. Wheelbase 1009 1019 1029 1040 1055
K. Standover Height (w/700x43) 750 780 800 820 840
L. Fork Rake 51 51 51 51 51
Have a Question?

Elevated chainstay

Building a chainstay this short with high tire volume is a packaging exercise because the chainring, chainstay, and tire all compete for space behind the bottom bracket. By moving the ABLE chainstay up and out of the way we could make it super-wide resulting in an incredibly responsive ride.

1x Crankset

A 1x drivetrain is quickly becoming the industry standard for gravel: You’ll always find the right gear at the right time. The ABLE is 1x-specific, which allows us to elevate the chainstay for tire clearance without resorting to a super-wide mountain bike-like Q-factor.

Tire clearance

The ABLE is designed around a 700x42c: This is the tire size we recommend for optimum BB height and steering (remember: tire size affects steering geometry.) But if you ride in really chunky rocky terrain the ABLE can adapt with 650c wheels and tires as big as 47mm in the rear and 55mm in the front.


Four sets of bottle mounts -- one on each side of the downtube, one set on the seat tube, and a top tube mount ideally suited for a bolt-on bag.

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