Rimac leverages supercar know-how in Greyp G12S electric bike
In 2013, the company responsible for the 1,088 hp Rimac Concept One all-electric supercar rolled out an electric vehicle of the two-wheeled variety in the form of the Greyp G12. At Salon Privé 2015 earlier this month, Croatia-based Greyp Bikes premiered its successor, the Greyp G12S, which retains many of the innovative features of the G12, but boasts a more powerful battery pack, new suspension and revised geometry.
The G12S features a very similar look to the first model, but a keen eye will spot the bulkier shock absorber in the rear or the single disc brake in place of the twin setup of the G12. Greyp points out that there are a lot more changes under the hood though, as some improvements are meant to be experienced rather than seen.
For starters, the 19-inch frame has been completely redesigned. Once again made from 25CrMo4 steel alloy tubes, it required a new geometry to accommodate changes in the electrical components that are hidden behind the carbon fiber panels. Instead of the two battery modules in the G12, the G12S hosts only one unit that packs more power for less weight. As it is now positioned lower in the frame, it helps bring the center of gravity closer to the ground.
The 84 V battery has a nominal capacity of 1.5 kWh (up from the 64 V, 1.3 kWh unit of the G12) and can be fully recharged in 80 minutes from a typical household outlet. Designed and manufactured in-house by Rimac Automobili using Sony Lithium Ion cells, the battery pack is controlled by a new bespoke management system and promises a minimum lifespan of 1,000 charge cycles.
This power pack feeds an electric motor installed in the rear wheel hub. With the three riding modes setup carried over from the G12, the motor produces a peak power of 12 kW in Power mode, down to 250 W in Street mode. The bike boasts a range of up to 120 km (74.5 miles), but the rider can add some extra muscle power to the mix by pedaling.
A nice trick up the G12S’ sleeve is the regenerative braking which, according to Greyp, renders the brakes almost redundant in most cases, while the motor recharges the battery with up to 2 kW of power. Should the situation require emergency braking, the G12S is equipped with radially-mounted Shimano four-piston hydraulic calipers on both wheels.
With an electronically limited top speed of 70 km/h (43.5 mph) in Power mode, this extra stopping power will probably come in handy sooner or later. In Street mode the G12S is limited to a 25 km/h (15.5 mph) maximum speed, corresponding to the limit that distinguishes electric bicycles from electric motorcycles in the eyes of European Union law.
Like its predecessor, the 48.5-kg (106.9-lb) G12S is meant for both on- and off-road riding and Greyp has made sure it will be up to the task by kitting the bike out with brand new adjustable Rockshox suspensions. These include a Vivid R2C rear shock and Boxxer RC forks that now feature 200 mm (7.9 inch) of travel, compared to the 180 mm (7.1 inch) of the G12.
One of the most noticeable features of the G12S is the 4.3-inch color touchscreen display with an integrated finger scanner. In similar fashion to the previous model, it can be programmed for multiple users’ thumbprints, but also allows different fingers of the same person to be assigned to different riding modes.
Greyp is already accepting orders for the G12S, with prices starting at €8,330 (US$9,400). An on-line configurator guides the customer through the process of personalizing their ride with several preset color options available, complemented by a custom palette for complete freedom in combining colors for the side panels, rear suspension spring and wheel decals. For a little extra cash, the G12S can be factory-equipped with Maxxis Hookworm 2.5 x 26 inch off-road tires and mudguards.
You can see the G12S in action in the video below.
Source: Greyp Bikes