Canyon Ultimate AL SLX 9.0 Aero review

Awesome alloy from our value-obsessed German friends

Our rating 
4.0 out of 5 star rating 4.0
GBP £2,299.00 RRP

Our review

Not our favourite spec for this bike, but the Ultimate AL remains an outstanding bargain
Buy if, You want a ready-to-race bargain with top-notch components
Pros: Ride quality, value for money
Cons: Cable rattles, wheels not an ideal match
Skip to view product specifications

Ah Canyon, direct-sales custodian of our hearts. Your Germanic marketing and ridiculous value for money are forever the bane of bike reviewers trying to carry out fair group tests.


We’ve tested Canyon’s Ultimate AL in a few different builds and it’s always done well, and this time we asked Canyon to send us one of its weight weenie specials. While the SLX 9.0 Aero isn’t the lightest build the company offers, it has an impressive spec that includes Shimano’s excellent Ultegra Di2 groupset, some stylish Reynolds carbon clinchers, and the usual decent finishing kit.

This is one bike that doesn’t need to make any apologies for its choice of frame material. Built around a very nice aluminium frame weighing a claimed 1,170g, the Ultimate AL is light for a metal bike, and within spitting distance of decent carbon ones.

Shimano Ultegra Di2 provides the go
David Caudery / Immediate Media
It doesn’t hide its construction, having welds that are prominent and visible, but they do nothing to detract from a smart, purposeful-looking package. We wouldn’t mind a bit more colour — in true German bike maker tradition, the paint job is rather conservative with black dominating.

Canyon makes specific versions of this frame for electronic and mechanical groupsets, with the former lacking the necessary holes in the frame for gear cable outers. It makes it look nice and clean, but it’s something to bear in mind if there’s a chance you might want to switch. While we’re on practical matters, the non-standard 1.25in fork steerer reduces aftermarket stem choices.

The Reynolds wheels supply the ‘aero’ part of this bike’s lengthy moniker, and they’re solid performers

Though this build differs from those we’ve previously tested, the Ultimate AL’s inherent talents were as evident as ever. It’s not one for smoothing out cobbles, but it’s comfortable for a race bike, and the skinny stays and VCLS (Vertical Comfort, Lateral Stiffness) seatpost deliver on their promises. The chainstays may look relatively insubstantial, but with a chunky bottom bracket, the flared ‘Maximus’ seat-tube and stout down-tube, there’s little sense of energy going to waste under hard pedalling.

The Canyon Ultimate AL SLX 9.0

Geometry is racy but not hardcore, with reach on our medium bike a standard 384mm; a 150mm head-tube offers a middling 558mm of stack, so saddle-to-bar drops won’t be as extreme as on some rivals.

The Reynolds wheels supply the ‘aero’ part of this bike’s lengthy moniker, and they’re solid performers. Their 41mm-deep rims are relatively well behaved in crosswinds and braking is powerful, if not quite up there with the best in terms of modulation. We do wonder if they’re an ideal match for this bike though.

Although the Ultimate AL isn’t harsh, its thin-walled aluminium construction makes for a somewhat resonant frame, and our test machine was afflicted by a bit of cable rattle over bumps — not unsolvable, but annoying. Adding clattery carbon rims to the mix doesn’t help, as the result is a bike that never quite shuts up. They also don’t quite feel in keeping with the spirit of the Ultimate AL — despite the name, this is a classic climber’s machine in essence and low-profile rims seem more appropriate.


The Ultimate AL remains a stunning bargain of a bike whether in this spec or another. It’s race-ready out of the box and there are no half-measures on the spec.

Product Specifications


Name Ultimate AL SLX 9.0 Aero
Brand Canyon

Available Sizes S M L XL XXL XXXL
Rear Wheel Weight 1500
Wheelbase (cm) 98
Top Tube (cm) 55
Standover Height (cm) 79
Seat Tube (cm) 50
Chainstays (cm) 41
Bottom Bracket Height (cm) 27
Wheelset Reynolds Assault SLG SE tubeless
Weight (kg) 7.46
Trail 7
Stem Canyon V13 100mm
Shifters Shimano Ultegra Di2
Seat Angle 73.5
Saddle Fizik Antares R5
Rear Tyre Continental Grand Prix 4000s II 700x25mm
Bottom Bracket Press-fit
Rear Derailleur Shimano Ultegra Di2
Headset Type Acros The Clamp
Head Angle 72.5
Handlebar Cabyon H17 Ergo AL 42cm
Front Wheel Weight 1060
Front Tyre Continental Grand Prix 4000s II 700x25mm
Front Derailleur Shimano Ultegra Di2
Frame Material Aluminium
Fork Offset 3.5
Fork Carbon
Cranks Shimano Ultegra 172.5mm, 52/36
Chain Shimano
Cassette Shimano CS-6800 11-28
Brakes Shimano Ultegra
Frame size tested M