Class 3 The Specialized Turbo Creo SL is a lightweight Class 3 carbon fiber e-road bike made for going fast and long.

Featuring the Gen2 SL 1.2 Motor & Integrated Battery The Gen2 SL 1.2 delivers 43% more torque at 50Nm. Plus you get 33% more power (320W) without compromising the Creo's famously clean, ultra lightweight design. On a bike this light, you are in for a spry and fast ride.

And feel of the motor to suit your riding needs and environment. If you want to learn how to use the tune feature. Check out the existing how to video on the specialized. University youtube channel.

130km range On the Turbo, the SL1-320 battery is claimed to have a 130km range from its 320W/h capacity, to which the range extender adds 65km from its 160W/h battery, for a total 480W/h capacity and 195km/121miles.

One thing that struck me most about the Creo is the ride quality. I've not ridden a Specialized road bike before, so can't compare directly to its unassisted counterparts, but the Creo is an absolute pleasure to ride. It never felt cumbersome, or difficult to climb with.

28 mph With its Fact 11r carbon frame, Roval carbon rims, plus the Class 3 Super Light 240W mid-drive motor that doubles your power up to 28 mph, this ebike is made for thrilling speed.

The Turbo Creo SL EVO is built for gravel and multi-surface riding with 38mm tires stock and a dropper seatpost.

Performance: When you need a boost to merge into oncoming traffic, the extra power the turbo gives your engine can improve its performance on the road. Fuel efficiency: Because turbochargers give your car extra power without increasing the size of the engine, they're typically more fuel-efficient than larger engines.

Turbocharging is able to provide faster speed and better performance without comprising the engine's driving power. Turbocharging is often referred to as “free power” since it can naturally improve how the engine operates rather than draining an engine's power.

Overall, the Creo SL Comp Carbon is an excellent electric road bike. In my eyes, it encapsulates what an electric road bike should be about – being the best version of yourself, rather than rising to 15.5mph and sticking at it with a tap of the pedal.

Specialized has launched the all-new Creo 2, an e-gravel bike that looks burlier than ever with its new 2.2in tyre clearance and standard dropper post. We've had a chance to take the bike out for a spin on the gravel tracks of southern Portugal to test its capabilities.

Highlights

• Range Extender 160wh battery pack costs extra.
• The lightest and fastest electric road bike I've tested to date, the motor is surprisingly zippy and actually supports 28mph speeds without cutting prematurely, it fades out naturally and does not introduce pedal drag.

At a little over 12kg, the Creo is very light for a deep section disc bike with a motor. More importantly, it feels it. A rear-hub motor system creates an imbalance that can make a bike feel heavy.

As well as increasing power, turbos increase torque – an engine's strength – particularly at low revs. That's useful in small petrol engines which tend to produce not much torque at high revs without a turbo. Naturally-aspirated diesel engines, by contrast, produce a lot of torque at low revs.

Benefits of a turbo engine They have greater power density and they are more efficient, the latter of which might mean more to more people. Basically, a turbocharger is connected to an engine to give it more power. This allows smaller engines to put out more horsepower and torque than they ordinarily would.

Performance: When you need a boost to merge into oncoming traffic, the extra power the turbo gives your engine can improve its performance on the road. Fuel efficiency: Because turbochargers give your car extra power without increasing the size of the engine, they're typically more fuel-efficient than larger engines.