It's happening, the first pedal assist mountain bike has made its way onto the test bike fleet. And we haven't just dipped our toe in the water here, we've thrown ourselves right in the deep end and have secured what may be the highest regarded e-bike out there, from Specialized, the Turbo Levo FSR 6Fattie.
The not-so-minor details
Specialized Turbo Levo FSR Expert 6Fattie
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Intuitive pedal assist power delivery.
Mobile app negates the need for a bulky display.
Streamlined management of battery and motor.
Can the brakes and drivetrain handle the weight and power?
It’s no secret that Specialized are putting a lot of weight behind these bikes and helping to drive the acceptance of e-bike culture here in Australia, and their global visibility in the internationally booming market is mighty as always. Their message ‘the power to ride more trails’ is being cast far and wide, and it makes a whole lot of sense to many people, we aren’t arguing with anyone who chooses to ride one. Since whisperings of e-bikes began echoing around the internet, we cannot recall one thing in all our years that attracts such a wide variety of feedback, and especially negative attention, than the topic of these bikes. Thankfully we’ve got pretty tough skin! But when it comes down our involvement in the segment, we are all about it. We’ll be reviewing the bikes for what they are, and supporting the communication channels and discussions as we see the benefits for those who would make the most of one, and that is that.
Before we get into looking at what the 2017 Specialized Turbo Levo FSR is, we’ll recall a couple of our recent posts on the topic of electrically pedal assist mountain bikes.
Specialized have been developing electric bikes for a while – their Turbo electric assisted commuter bike is an impressive piece of work – but e-mountain bikes are a different kettle of fish, and the hub-drive motors found on many commuter bikes aren’t appropriate off road. Instead the Levo uses a centre-mounted motor, that has been custom built exclusively for Specialized.
We want to deliver, without bias or prejudice, the answers to a few of the questions that we had prior to our first e-xperience.
In the last few months, we’ve had a couple of discussions about electric assisted mountain bikes which have really captured the essence of the debate over the place of this technology in mountain biking. We have recalled both of these interactions here, without bias.
What is the Turbo Levo FSR?
Specialized don’t do things by halves, when they set out to make an e-bike they were not going to settle for anything less than the best, so we’re not surprised at all to see how much has gone in to the development of this bike. The Turbo Levo FSR is a proper off-road bike with an M4 aluminium frame, 140mm travel forks, 135mm travel out the back and all the same components that you’ll find on a real mountain bike. The wheels are regular too, and removing them for transport or changing a flat tyre is just as you would with a normal bike.
The Turbo range is huge, with Specialized bringing in a whopping eight versions to the Australian market, two hardtails, five dual suspension FSR and one women’s specific FSR, all using the 6Fattie wheels. And being a Specialized the focus on frame geometry was paramount, so the chain stay length is as short as possible, and the steering angles slack and stable for proper shredding.
The FSR rear suspension is based around the same design that you would find on their entire dual suspension range which uses their Autosag rear shock pressure setup system for guess-free setup, and of course they’ve even managed to fit a full-size water bottle in there and keep the cable routing internally despite the added complications of a battery and motor.
How does it work?
There is no throttle to twist or button to push to get moving, the Levo delivers power to the cranks in assistance to yours. What makes e-bikes ride naturally and well off-road on varying terrain and surfaces is the way that the power is delivered in an intuitive manner, in this case it’s quite complicated to explain when the power comes, stops and how much is delivered as it is sensitive to torque and speed. We’ll delve into more of the working of the system in our final review, but in short the battery power is delivered to the cranks when the bike is moving and torque on the cranks is detected. It rewards your smooth and steady pedal stroke with a high cadence, and the power cuts out at 25 km/hr.
Where are all the buttons and displays?
There’s nothing on the bars, no computer in sight, save for a three button pad on the side of the down tube which turns the system on and off and adjust between the three power modes; eco, trail and turbo. All the rest is done via your smartphone, and the Specialized Mission Control App.
What does the mobile app let you do?
The app has loads of functionality and provides you with all the information and enables complete control. Via a Bluetooth connection you can see information about the bike, the motor, battery life and will let you tune the motor to how you prefer it to react.
The app allows you to see huge amounts of information about your bike, the battery, the motor and your ride times and intensities, sent from the bike to your phone via a bluetooth connection. Delving deeper into the functions of the Mission Control app the ‘tune’ modes allow you to tweak how your bike performs in each of its three settings and how quickly the motor kicks in on each pedal strokes. And then there are nice features like the ability to tell the battery how long you intend on riding for, allowing it to dish out the power evenly and tailored for your ride duration.
What type of motor is in there?
You won’t find any third party brands on the Levo, Specialized have developed their own motor, and do all the development from their e-bike dedicated facility in Switzerland. More on that in our upcoming review.
Why the 3″ 6Fattie wheels?
Aside from powerful brakes, the tyres are a component that we’d expect to be up to the task of keeping a 25kg bike under control, and in this case it makes complete sense that the Levo FSR should use plus sized wheels. The 650b (27.5″) diameter wheels and wide 38mm rims are wrapped in huge 3″ tyres. Our first ride on the Levo FSR was on one with regular 29″ wheels and we’re way more impressed with how the bigger tyres with lower pressure play to the strength of an e-bike. There’s a lot less wheel-spinning with this huge footprint too, certainly a factor worth considering with e-bikes under debate in regards to trail damage.
We’ve ridden and rated two of the 6Fattie bikes from Specialized, the Fuse hardtail and the Stumpjumper FSR 6Fattie. Check out those reviews here for more on the concept of the wheel size. Fuse review, Stumpjumper review.
How’s the spec on the Expert model?
The Expert level spec is very high end stuff, for $9999 you’ll end up with a parts spec comparable to the Stumpjumper FSR Expert Carbon 6Fattie which retails for $7200. There is massive 200mm rotors (usually found on big travel enduro and downhill bikes) at both ends to deliver gobs of braking power, and the drivetrain is SRAM’s Xo1 with Praxis cranks and stainless narrow/wide chainring. A neat little chainguide provides added security.
We’re going to ride it, a lot. We want to be able to fully understand how it works, where it shines and where it doesn’t. We don’t need to get into the debate of who they will suit, or where they belong, we’re getting pretty tired of that chat already. But in our upcoming review we’ll hopefully have a whole lot to say about the performance of this bike, just like any other bike review we do at Flow.