Electric Bikes Here's a place to discuss ebikes, from home grown to high-tech.

How many Watts ?

Reply

Old 12-08-15, 02:31 PM
  #1  
K2AZ
Member
Thread Starter
 
Join Date: Dec 2015
Location: Glendale,AZ
Posts: 38

Bikes: K2 Attack 2.0

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
How many Watts ?

So I have been looking for a mid-drive Kit. I'm 190 lbs. (looking to get back to 175'is) and going to be 65.(been sitting back a little long LOL ) I will be using a K2 Attack 2.0 for the frame. Frame is a little heavy but so am I !

Will be doing some committing and typical bike paths. Want to be able to do some offroading and trails.

The question is how many WATT'S ?

In my reading it looks to be 750w with a 48v system. But their is a 1000w. But it adds 2+ lbs.

What would you suggest ? Is more better ?

I have always told me boat customers get the max HP that the boat is rated for. Then you can't be unhappy with the speed and power of the boat. Should I use this for my build ?

Randy
K2AZ is offline  
Reply With Quote
Old 12-08-15, 03:58 PM
  #2  
Robert C
Senior Member
 
Robert C's Avatar
 
Join Date: Sep 2006
Location: Salt lake, UT
Posts: 2,037

Bikes: This list got too long: several ‘bents, an urban utility e-bike, and a dahon D7 that my daughter has absconded with.

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 284 Post(s)
750 W is legal in the US, 1KW is not. That may be a consideration.

I really doubt you will see a big difference between the two (all other things being equal). That being said, if maximum power is important to you, I would go with the 1KW.
Robert C is online now  
Reply With Quote
Old 12-08-15, 04:26 PM
  #3  
K2AZ
Member
Thread Starter
 
Join Date: Dec 2015
Location: Glendale,AZ
Posts: 38

Bikes: K2 Attack 2.0

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks Bob
Maybe I will start with the 750w and if I want more I will put this on my Wife's cruiser ? Lol
K2AZ is offline  
Reply With Quote
Old 12-08-15, 06:42 PM
  #4  
350htrr
Senior Member
 
Join Date: Jul 2012
Location: Canada, PG BC
Posts: 3,523

Bikes: 27 speed oryx with over 39,000Km on it, 11,000Km with a BionX assist on it

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 828 Post(s)
If the reason you are going E-Bike is to get back into shape but need some assist sometimes get the smaller motor... Oh and PAS is a must, the kind that gives you a % of how much you are putting into it (pedaling) not just a throttle or a pedal rotation PAS...

Last edited by 350htrr; 12-08-15 at 06:45 PM.
350htrr is offline  
Reply With Quote
Old 12-08-15, 07:22 PM
  #5  
InTheRain
Senior Member
 
Join Date: Feb 2007
Location: Puget Sound
Posts: 1,976

Bikes: 2007 Rocky Mountain Sherpa 30 (bionx), 2015 Cannondale Synapse Carbon Ultegra

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 139 Post(s)
I have ridden the bosch mid drive 350 watt bikes, and panasonic 250 watt and 350 watt motors. They were pretty good climbers. I climbed a hill of about 700 feet in Portland on a 350 watt panasonic. It wasn't easy, but it's something I would have never been able to do without an electric motor. No throttles on these motors. If the 750 watt or 1000 watt mid drives are 2-3 times more powerful, I don't think you'll have any problems with either. I have a 350 watt rear hub direct drive electric kit. It's plenty on the highest level of assist for most conditions. I've climbed some short very steep hills, and with max effort and max assist I'm still going to slow down to 10 mph... but then again, these are hills that I'm not going to be able to climb (at my age, weight, and poor level of fitness) on my regular carbon fiber road bike (anyway I don't think I can, I'm not willing to risk it and possibly crash.)
InTheRain is offline  
Reply With Quote
Old 12-08-15, 07:39 PM
  #6  
K2AZ
Member
Thread Starter
 
Join Date: Dec 2015
Location: Glendale,AZ
Posts: 38

Bikes: K2 Attack 2.0

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks for the input !

Also was thinking about resale. Thinking the kid's would want the "big" power.
K2AZ is offline  
Reply With Quote
Old 12-08-15, 07:41 PM
  #7  
2old
Senior Member
 
Join Date: Jul 2014
Posts: 1,256
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 137 Post(s)
K2, I have a 750w BBS02 and it seems to mate perfectly with Luna Cycle's 52V, 10 ah battery. It has ten (0-9) levels of assist and a throttle which over rides the PAS. The controller was set to 22 amps maximum, so by one level of calculation, it inputs about 1000 watts (22 X 52). It seems perfect for my use, but if you're considering the bigger system read what Karl has to say about it on electricfatbike.com.
2old is offline  
Reply With Quote
Old 12-09-15, 02:17 PM
  #8  
chas58
Senior Member
 
chas58's Avatar
 
Join Date: Jul 2010
Location: Michigan
Posts: 3,062

Bikes: too many of all kinds

Mentioned: 21 Post(s)
Tagged: 0 Thread(s)
Quoted: 526 Post(s)
I go for small and light, but then again I'm not building a boat, and I like to pedal.

I'm a strong rider and I can put out 300+ watts, so a 350 watt system doubles my power. Anything more than that and your pedalling is not going to supply more than a small fraction of the power. 1000 watts is a sweet spot, but at that point your just along for the ride. Yeah, you can pedal, but you won't go any faster by pedaling at that power.
chas58 is offline  
Reply With Quote
Old 12-09-15, 03:29 PM
  #9  
K2AZ
Member
Thread Starter
 
Join Date: Dec 2015
Location: Glendale,AZ
Posts: 38

Bikes: K2 Attack 2.0

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
That is a good point,chas58. Never thought about the power that I can make .
K2AZ is offline  
Reply With Quote
Old 12-10-15, 05:28 PM
  #10  
K2AZ
Member
Thread Starter
 
Join Date: Dec 2015
Location: Glendale,AZ
Posts: 38

Bikes: K2 Attack 2.0

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Think I will stay with the 750 watt.

Weighed the bike today. 38.6 Lbs. So the total will be like 58 to 60 lbs. Don't jnow if this bad or OK ?
K2AZ is offline  
Reply With Quote

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service