Review 2020 Pirez E3

Reefrunner

New Member
Apr 25, 2020
1
0
Australia, Brisbane
The Bike:
Annotation 2020-05-24 182036.jpg


Manufacturer: Pirez
Model: E3
Model Year: 2020
Price Paid: A$3,995
New/Used: Brand New
Score (out of 10): 6

Review: A good off-road recreation EMTB for your average punter. A very comfortable ride across all types of terrain, urban pavement / road, intermediate to advanced single tracks loose gravel and rocky terrain. Well-constructed for fun singletrack sessions, and excellent torque sensing. Very good value at $3995. Limited range of 25-35km’s for a 96kg rider, the battery is undersized for this motor and has stalled in hard climbing due to massive voltage sag, and this ebike is quite heavy at 27kg and with high rolling resistance energy efficiency is poor on the E3.

Rider stats, mid fifties, 6’ 4” 95kgs

Torque sensing is excellent on this bike, the ISIS 10 spline cranks with the torque sensor means that torque is delivered very progressively, it measures crank torque so the harder you pedal the more the motor gives you. This means control on low speed technical steep sections, and allows you to wind it up on the road to 55km/hr. This also means that the ride is quite engaging as it mimics the riders input, and after an hours riding, my legs start to feel it as the motor amplifies the torque that you put into the circuit.

Brakes are good dual piston metal pads 180mm rotors front and rear allow for good stopping power on steep advanced slopes and from high speeds. 10spd allows sufficient low range for singletrack climbing and high range for speed on roads, however, going through the range is tiring. Reasonable quality groupset but definitely not top end. This bike comes in one size, at 6’ 4” the geometry is quite upright, anyone under 5’ 8” might struggle.

The bafang ultra motor is very good. There are two riding modes, Sport and ECO which is about half power. Have only used ECO PAS5 in off road and there is adequate torque to climb the steepest singletracks in my area which are intermediate – advanced. Urban riding ECO and PAS5 is more than adequate, on the flats top speed of 47km/hr. Urban riding in Sport mode, you can reach speeds of 55km/hr+

Battery and Range. At 48V 672Wh while this compares favourably with other more expensive EMTB’s on the market, however this is weak and inadequate for a ultra motor at 1500W. Riding in ECO PAS5 it is ok, for a 96kg rider cranking hard in SportPAS5 generates huge torque 160Nm. For example, a speed run peddling hard over the M1 gateway bridge 3.25km and 129m elevation (return trip) means high current draw on the climb and a massive voltage sag of 24%! Over 600km’s of riding data, the range of this bike for a 96kg rider;

  • Urban riding in Brisbane roads / pavement entirely in ECO PAS4&5 achieved a range of up to 35kms 2hrs average speed 18km/hr
  • Off road riding, ECO PAS5, elevation 500m+ 1h 45m the range is up to 30kms but it really depends on how hard you are riding
  • Urban riding in SPORT PAS5 achieved a range of up to 25kms 1h 15m average speed 23km/hr. Note the E3 has a top speed of 55km/hr+
  • Climbing steeper hills in SPORTPAS5 mode, I have had the motor shut down three times due to volt sag below zero the controller shuts the motor down (high torque / current demand), normally on the steepest pitch. Basically, this battery cannot handle maximum torque / current demand that this motor needs.
It would be great if you could get a 52V 900-1000Wh battery option and I would pay for the extra capacity and range up to 50kms. The Ultra motor is designed for 48-60V so a 60V battery would ultimately be the way to go. I can’t see why this is not possible as there a few inches above the battery downtube to expand the case for more cells. The downside is more weight but you could live with that.

My 24kg BBSHD 52V 910Wh hardtail can do 50kms in PAS5, and in medium or low PAS 70-100kms. The E3 comparatively has only half that range at 25kms, it has a smaller battery at 48V 672Wh, it is heavier, it has wider tires 2.6 vs 2.2 higher rolling resistance, the motor is 1kg heavier, stator almost twice the diameter which demands higher peak current, so overall much less energy efficient than the BBSHD. To be fair though the BBSHD is set up as a long-range commuter, whereas the E3 is purely an off road ebike.

Options are limited in Australia for value and performance, all the best stuff seems to be in North America I wish we could get Luna Cycle bikes here as well as buy direct from China without the freight cost.
 

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