3000Watts 24V-72V Brushless Kit max speed at 24v?

[fabieville]

Please view the link below and tell me:

what would be the estimated max speed I can get operating this kit on a 24v 30ah lithium-ion battery on a flat terrain with minimal wind on a 26" bicycle with a 160lbs rider?

Also what would be the est. cruising mph on a flat terrain from the same 24v 30ah battery?

Here is the link:
http://www.ebay.com/itm/E-Bike-Mid-Crank-3000Watts-24V-72V-Brushless-Kit-With-OR-Without-Battery-/161801063207?ssPageName=ADME:X:AAQ:US:1123

Here is the specs:
Specifications:
system power : 1800-3000 wats
working voltages : 24V-72V
working current: 20A- 125A
max speed - 100 km/h , 65 mp/h at 48V
controller size: 8x15x4 cms , have 3 speed function and cruise control function.
motor is bruhsless geared
motor weight: 4 kg's
Motor size 130x130x165mm
rpm: 600rpm
torque 100Nm
chainwheel 44T 44T 32T
crank set: ISIS
BB: ISIS
gear reduction: 5:1
the kit is waterproofed, low noise , no over heat, high efficency, high torque.

 

[SjwNz]

maybe around 30Km/h at this voltage. I am running a DIY setup at 40Volts and top speed around 55 t0 60km pulling around 2800watts.

 

[fabieville]

maybe around 30Km/h at this voltage. I am running a DIY setup at 40Volts and top speed around 55 t0 60km pulling around 2800watts.

This setup that u r running is it using the same motor that i described?

also if I don't use the 3 speed switch connection will i get the max speed at the 24v by default without using the switch or do I have to connect the 3 speed switch to get the max speed at the 24v which I am currently operating it at?