Words Lester Perry
Images Jamie Fox
RRP $11,500
Distributor Specialized NZ
The Specialized Turbo Levo SL debuted in 2020. With its discreetly integrated battery and motor system, it looked more “normal” than the competition’s eBikes at the time. The Levo SL set the standard for eMTB aesthetics and was a lighter, more agile alternative to the standard Turbo Levo, Specialized’s full-powered bike that launched five years earlier.
Now in its second generation, we’ve seen an evolution in suspension, updated geometry and improved motor efficiency. I’ve spent roughly two months with this bike, changing its many adjustments and razzing it around my local—and some not-so-local—trails.
Chassis
The SL2 Comp Alloy is the gateway into the SL lineup. With its alloy frame, it’s what I’d call the heavyweight of the SL range; the frame comes in at a kilo heavier than the carbon equivalent, so although there’s not a vast difference between the two, a kilo is a kilo. Considering the motor and battery are identical to those of its higher-end carbon brothers, the Comp Alloy would be an excellent platform for future upgrades; decreasing its weight (although not by a drastic amount) and adding to the overall ride experience with better components.
With a 160mm front suspension fork and 150mm travel in the rear, the Levo SL2 strikes a healthy balance of brawn and butterfly. There’s enough travel and the geometry is designed to not hold you back on the nastiest of descents, yet the bike is light and nimble enough to pick your way through tech, rapidly change direction, and even bunny hop or manual through sections with surprising ease.
This bike could be viewed as a couple of different bikes, able to be configured in a number of ways thanks to the breadth of adjustment available: the head angle is adjustable between 63 degrees (slack), 64 (stock), and 65 (steep). Adjusting this is almost as easy as replacing a headset bearing; remove the stem, headset top cap, compression ring and bearing, and lift out the upper headset cup. No tools are required. Drop in the supplied ‘adjustment’ headset cup; depending on its orientation, you’ll either get down to 63 degrees or up to 65.5 degrees. Refit the headset components—and job done. There’s no need to touch the lower headset cup at all.
The bike has a mullet wheel configuration, a 29-inch wheel up front, and a 25.7-inch out the back. Thanks to a flip chip on the Horst pivot (near the dropouts) that lengthens the chainstays by 10mm, the rear wheel can be swapped out for a 29-inch if you want more roll-over capability without nuking the machine’s handling. The bottom bracket is adjustable to a minor degree by flipping its off-centre lower shock mounting hardware and raising the bottom bracket by 5mm from stock. It’s a scant amount but will offer a smidge more clearance for the pedals and motor housing over technical terrain, although I haven’t found this to be needed in the stock ‘low’ setting. It’s worth noting that each adjustment made will affect all geometry numbers. Specialized have a chart in the manual explaining what the numbers look like with different adjustment configurations.
I toyed with the head angle a little, riding with it in the stock 64 degrees to begin with, then in the steeper 65 degree setting. The stock 64 degree setting was a good middle ground for most trails, although it felt a fraction slacker than ideal on flat or mellow trails. So, I fitted the adjuster cup, setting it to 65 degrees. The one-degree steeper head angle increased the manoeuvrability on anything mellow and tight, but it wasn’t as stable on choppy descents. I never felt the need to slacken the bike to 63 degrees, but if I were headed somewhere to ride steeper, faster trails, say Queenstown or Nelson, the slacker setting would be ideal. The stock 64 degrees seems to be the perfect middle ground for general riding.
Given all the adjustment options, this bike can adapt to optimally align with your riding style and the trails you ride.
Genie Shock
This latest iteration of the Levo SL features the Specialized developed, Fox-manufactured, Genie shock. This unit launched to fame on the latest Specialized Stumpjumper, claiming a coil-like feel and a tuneable mid- and end-stroke.
By making the main air spring larger, they’ve enabled the shock to maintain small bump sensitivity and relatively linear progressivity through the first 70% of its stroke. With 30% of the stroke remaining, the shock closes off most of the total air volume, essentially creating a smaller volume air spring active for the end of the stroke, causing a much steeper ramp-up and drastically increasing bottom-out resistance. On a bog standard air shock, in most cases (depending on the bike design), you sacrifice small to medium bump compliance and sensitivity to achieve decent bottom-out resistance, and vice versa. Bottom-outs increase once you soften the shock in a quest for buttery small bump and mid-stroke sensitivity. The Genie manages to deliver small bump sensitivity while maintaining super end- stroke ramp-up, and bottom-out resistance.
After my first ride on the Genie, I was amazed at how linear the shock felt, and it certainly delivered on the coil-like claims with a buttery smoothness. Although it performed well, I wanted a bit more support to push against while pumping and jumping, and felt it was moving through more travel than was necessary, causing it to wallow at times. Mid-stroke tuneability is in the shape of plastic volume bands fitted in the air can, much like many other shocks. They’re simple to fit and equally easy to remove. Let all the air out of the shock, pick off the snap ring that holds the air can on, slide it back, snap the two halves of a volume spacer together over the shock body, slide the air can back into place, refit the snap ring, air it up and hit the trails—all you need is a small pick—or in my case, a tiny screwdriver from my son’s tool kit that worked as one—a shock pump and five minutes.
Once I slid the air can off, there were no bands to be found, which explained the overly linear feel. I fitted three bands of a possible four, aired back up to 33% sag, and confirmed my choice with some front-yard testing. It wasn’t until I hit the trail that the extra support really brought the bike to life, increasing how playful and lively the bike was on the track.
The end-stroke is also tuneable by adding circular chips to the shock’s interior air chamber. It’s a slightly more involved procedure, but it can still be done without removing the shock from the bike. The end-stroke ramp up and bottom-out resistance was fine for me in its stock setup, so I didn’t change anything here.
Once dialled in, the shock performed like the literal magic carpet Specialized intended. Thanks to the Genie’s effectively softer-than- normal spring rate early in the stroke, the small bump sensitivity was impressive, and there’s an amazing amount of traction on offer, it’s really noticeable how well the rear wheel tracks across bumps while pushing through a rough section or corner, compared to many other bikes.
Spec highlights
Fork: Fox Float 36 Rhythm | grip damper 160mm travel. The fork is stout enough to handle the heft of the bike, and did an adequate job, but could benefit from better damping and adjustment. A worthy upgrade, or step up through the SL range to get these benefits. Brakes: SRAM Maven bronze | 200/200mm rotors. Mavens get the big tick from me, the power and consistency are amazing and they add a level of confidence to an eBike that I don’t think can be gained by any other single component. Drivetrain: SRAM GX eagle shifter, chain and cassette, coupled with a SRAM X01 derailleur. Does the job admirably. Once it eventually wears out, I’d replace this with a SRAM T-type system as it’s far superior on an eBike.
Crankset: SRAM S1000, 165mm length. Short cranks are the best on eBikes, and 165mm is a great choice.
Wheels: In-house Specialized alloy rimmed set. They do the trick but, considering that the bike had hardly any use when it turned up but the rear wheel already had a small flat spot in it, I’d say that much like many OEM specced alloy wheels, these rims are on the softer side.
Tyres: Front—Specialized Butcher | grid trail casing | gripton t9. Rear—Specialized eliminator | grid gravity casing | gripton t9/t7. No complaints here. Reality is that, with the extra weight of an eBike, most tyres perform pretty well. Good to see a heavier Gravity casing specced on the rear, although with their softer compounds, the square edges are worn from the knobs quite quickly.
Cockpit: We get some plain Jane—but effective—alloy parts here. The handlebar has 20mm rise and a comfortable shape—no real complaints, but an easy place to upgrade.
Seatpost: X-fusion manic 170mm. This post fits the price point well, there’s no noticeable play in the post and it’s nice and smooth, but the return is a bit slower than ideal.
Motor unit
At the heart of the Levo SL2 is the new SL 1.2 motor, Specialized’s latest—and a noticeable improvement on the previous SL 1.1 generation. It offers a quieter, more natural-feeling ride, delivering 50Nm of torque, up from 35Nm previously, with 320 watts of power. Although there’s enough power and torque to get you through most scenarios, the light weight comes with the feeling that the motor is not doing all the work, you’ve got to play your part too.
The SL2 has a 320Wh battery, and a 160Wh extender is available. The SL series bikes are lightweight in all aspects of the driveline, compared to the standard non-SL Turbo Levo models, which are powered by the Specialized 2.2 motor pushing 90Nm, with a 700Wh battery. The range extender can also be used on the full-powered bikes.
The burning question everyone has regarding eMTBs is; “how long does the battery last?” The answer inevitably is always; “it depends”. There are so many variables at play that it’s hard to compare even the same bike between riders, let alone different riders on different bikes. I’ll put a stake in the ground, though, and you can make some assumptions from there. Fully kitted, I’m pretty well bang on 80kgs, and my local trails are either up or down; there’s a minimal amount of flat ground, so I’m either climbing or descending.
The climbs are pretty steep, and there’s sporadic pedalling down most of the descents. On a ride where I used Turbo most of the time while climbing the gravel road climbs (some very steep) and Trail mode everywhere else, I can get 1:45 to two hours out of the battery. The variance in time is solely down to how hard I’m riding; a solid, fast pace, and I’m looking in the vicinity of 1:45, but a little less effort on the climbs and I can get to two hours. On the same ride, if I backed the assistance down and asked a bit more of my legs, 2.5 hours or three at a stretch, may be attainable. For rides made up predominantly of flat sections, if I stuck to Eco mode, I think I could hit the 3.5 hours Specialized claim is achievable. The truth is, though, I don’t want to ride like that, so I budget my rides at 1:45 hours ride time and go from there. Once the battery is down to 10% charge, the bike will slide into Eco mode to help you limp home.
The power delivery is very natural; there are no surprises or sudden accelerations, and the motor simply does what it should and multiplies your power with a smooth ‘acoustic bike’ feel. There is a slight lag when initially putting effort into it, and this took a little time to adjust to, but I soon adapted to it. The SL1.2 motor rewards a cadence of around 75-90rpm for those looking to get the most out of each pedal stroke, so if you’re one to rely on the torque of a motor to get up a pinch, rather than shifting to a lower gear—this bike’s not for you.
Mission Control App
I didn’t faff with the app too much; I just synced up my phone with the bike, pushed some assistance settings to ‘max’ and got stuck in. I wanted to ride this like a standard bike and not get bogged down with tweaking, tuning and apps. It’s nice to have the ability to fine-tune assistance levels simply, and if a user wanted to maximise battery efficiency, one could nerd out with the settings. Software updates for the bike are done via a connected app, no need for cables.
MasterMind TCU
An upgrade over the SL gen 1 is the use of the MasterMind TCU (Turbo Control Unit). The screen is seamlessly integrated into the top tube and comfortably readable at a glance. Modes and screens on the TCU are controlled via the simple-to-use handlebar remote. It’s a nice touch to be able to micro-adjust through assistance levels in 10% increments if you want to get specific assistance while out on the trail, rather than relying on the pre-programmed three settings.
The ride
The Levo SL2 is the first lightweight, low-powered eBike I’ve ridden. So, my observations are compared to full-powered eMTBs and regular old pedal bikes.
Taking the SL2 for its first ride, my immediate thought was; ‘damn, this actually handles like a normal bike!’ My main gripe with full power bikes in the past has been that they don’t suit my riding style, they’re fun in their own way, but their weight means they’re more like a cruise liner than a jet boat… and it’s a jet boat I want! Precise, nimble, manoeuvrable, responsive, confident and playful are the current acoustic bike marketing buzzwords, I guess. Unfortunately, most of these boxes can’t be ticked on a full- power, full-weight eBike – as mentioned, their characteristics align closer with the cruise liner.
Descending on the SL2 takes the best from an acoustic experience and couples it with the best from an eMTB. The SL2’s higher weight than a normal bike combined with its capable suspension gives insane stability and predictability while descending but, being lighter than a full-powered eBike, combined with its balanced geometry, means it’s drastically nimbler and more precise down a hill than its overweight brethren. The ability to change lines and unweight through sections really sets this lightweight bike apart.
The more I rode the SL2, the more I was amazed at how well it corners. I didn’t need to change any components or make any adjustments at all to make it perform; I just got on and rode. Even in its stock setup, it handles turns exceptionally. Balanced geometry is a piece of the turn- shredding puzzle, and so too is the lower centre of gravity of an eMTB, but the traction on offer sure makes a difference, too; part of this will be thanks to the weight of the bike (over an acoustic one), but the suspension is up to the task. The SL2 is a leap above any other eBike I’ve thrown a leg over in the cornering department, and it is better than some trail bikes I’ve reviewed.
Jumping on the SL2 is great, and surprisingly so. The weight is nice and balanced, and it is predictable taking off everything from lumps and bumps to larger, steeper lips.
The bike cruises along flat trails where there’s no need for high power similar to a full-fat one, just more nimbly and playfully, not weighed down by additional motor or battery heft.
Compared to high-powered eMTBs, the SL2 didn’t give me superpowers to tackle super steep climbs—you know, the ones where you can barely keep the front wheel on the ground, even with your weight right over the front. Instead, the SL2 meant I could make it further up super steep pitches than I would on a trail bike, before I ran out of steam but, unlike a full-powered bike, I definitely felt like I needed to use my own strength, rather than just chopping into Boost mode and have the bike ‘pull’ me up the hill.
Without the power, torque or battery capacity of a full-fat eMTB, the SL2 still takes some effort to ride, and I found I can still get a similar workout to a regular bike while riding it, just covering more ground and not blowing myself up to maintain higher speeds. Riding a full-powered eBike I find I’m still getting a decent cardio workout, and it’s quite normal to be sitting up at high heart rates for long periods, but most of the time (unless I’m sitting in Eco mode), it feels like there’s not much leg strength necessary. The SL2 hits a sweet spot and, thanks to coupling it to my Garmin, I could see my own power input and proof that I was pushing similar watts to a normal bike, just going faster for them.
The SL2 let me ride how I like to ride. It’s light enough to be playful, but hefty enough to offer the composure and stability only extra weight can give while descending. Until this bike, I wouldn’t have considered owning an eBike as my only mountain bike but, after a couple of months aboard the Levo SL2, I may have found the bike that would make me switch sides.
