The different components of the Ariel Dash drive system has been chosen keep the philosophy of the e-bike project and also the philosophy of the Company.
Motor
A hub motor was chosen to minimise weight, for better weight distribution and to give direct power delivery to the rear wheel. At only 100mm diameter the Mahle motor is discreet and at just 1,399 grammes is the lightest production e-bike motor available. The motor uses a thru-axle interface giving easy wheel removal for servicing, or in the event of a puncture.
Motor power is the legal maximum at 250W on both models, with the Urban using the Mahle X35+ system and the Adventure featuring the X20 system, giving 40Nm and 55Nm torque respectively.
Battery
Housed in the downtube, the Dash 36V battery (236Wh in the Adventure Mahle X20 system, 250Wh in the Urban Mahle X35+ system) has integral BMS (Battery Management System) and motor control, to minimise wiring, and uses CAN bus digital communication with the rest of the drive and charging system. The 18650 lithium cells, in a 10S/2P formation, reflect those used in the Ariel Hipercar. Range extender batteries are available as an option giving a total of 458Wh (Urban) and 407Wh (Adventure) with an 80-mile Urban range and 95-mile Adventure range. The integrated main battery also powers the LED lights, eliminating the need for further batteries and again minimising complication and weight.
Charging
The charger, which plugs into a standard household socket, connects to the Dash above the bottom bracket on the carbon seat tube via a built in charge point. By communicating over the CAN bus network the battery can be charged at different intensities to make charging more efficient and faster. Charge time, from 0 – 100% is just 2.5 hours and to 75% in less than 2 hours. The optional range extender charges to 80% in less than an hour and is connected to the bike via the same charge point, saving weight and avoiding duplication.
Transmission
The Dash Urban features a single speed, Gates polymer toothed belt drive with a 50T front sprocket and 20T rear sprocket, giving a 2.5:1 ratio. Having evaluated some 20 combinations of sprockets, and cross refenced performance against city topographies, Ariel is confident the ratio gives the best performance for on road and town riding. The one-piece belt is very light, silent, completely maintenance free and extremely durable lasting up to 50,000 miles.
The Dash Adventure uses a 12-speed Shimano GRX gearset as standard with a FC – RX820 170mm 40T chainset and CS-M8100 XT cassette. For mixed terrain use the transmission offers optimal gearing for both on and off-road riding. Shift ramp design provides faster smoother shifting and lightweight cassette construction saves weight.
Source: Ariel Motor Company
Here is the complete series of more detailed articles of the new Ariel Dash e-bike
Ariel Motor Company announces the new vehicle Ariel Dash e-bike
The frame of Ariel Dash e-bike
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