Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

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5chn3ll
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Re: Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

Post by 5chn3ll » Thu Dec 13, 2018 9:26 am

Update: about 70 miles on the bike since the lipo upgrade. Since switching to the seatpost mount for the battery, nothing has shaken loose in the past 2 rides. The suspension seatpost makes a HUGE difference when you're smacking into imperfections in the road at 30+ MPH instead of 15-20...your butt will thank you. I thought it was a bit of a luxury upgrade, but in hindsight (heh...hindsight), it was some of the best money I spent.

Understeer: You will hit the wall with the front end.
Oversteer: You will hit the wall with the rear end.
Horsepower: How hard you will hit the wall.
Torque: How far you will move the wall.

Gone hunting with Alec Baldwin and Dick Cheney. Back soon.

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Re: Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

Post by FRUNKenstein » Fri Dec 14, 2018 11:26 am

5chn3ll wrote: Thu Dec 13, 2018 9:26 am it was some of the best money I spent.
. . . "best money I spent" being a relative term, of course.
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5chn3ll
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Re: Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

Post by 5chn3ll » Mon Dec 17, 2018 4:25 pm

I am forbidden in at least one jurisdiction from using "best money I spent" and "a relative" in the same sentence.

Dammit, I just did it.
FRUNKenstein wrote: Fri Dec 14, 2018 11:26 am
5chn3ll wrote: Thu Dec 13, 2018 9:26 am it was some of the best money I spent.
. . . "best money I spent" being a relative term, of course.

Understeer: You will hit the wall with the front end.
Oversteer: You will hit the wall with the rear end.
Horsepower: How hard you will hit the wall.
Torque: How far you will move the wall.

Gone hunting with Alec Baldwin and Dick Cheney. Back soon.

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5chn3ll
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Re: Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

Post by 5chn3ll » Tue Mar 19, 2019 12:01 am


Understeer: You will hit the wall with the front end.
Oversteer: You will hit the wall with the rear end.
Horsepower: How hard you will hit the wall.
Torque: How far you will move the wall.

Gone hunting with Alec Baldwin and Dick Cheney. Back soon.

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32wildbilly
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Re: Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

Post by 32wildbilly » Tue Mar 19, 2019 7:25 am

5chn3ll wrote: Tue Mar 19, 2019 12:01 am
Vid made me feel like The Blair Witch Project without the up the nose shots.

Estimated top speed possible? Range? Did you do anything to improve brakes? When will you begin to market them? 8-)
Never gonna make you cry...

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5chn3ll
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Re: Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

Post by 5chn3ll » Tue Mar 19, 2019 9:29 am

Brakes: The Dew Deluxe came with standard rim brake, but also had the lugs for discs. I installed Shimano mechanical disc brakes a few years back; when I added the electric front wheel, I had to replace the caliper on the front fork with a low-profile caliper.

In addition to being more reliable in the wet than rim brakes, I was able to use a "standard" 26" mountain bike wheel instead of a 700c wheel - the slightly different diameter would be a major problem for rim braking, but the disc is the same regardless of which wheel it's used on - so I can swap the motorized wheel between all of our bicycles.

On the kickstand, the bike does a little over 40MPH; with my ungainly and decidedly non-aerodynamic organism onboard, top speed drops to about 35MPH. On battery only, I pull away from stoplights at least as fast as other drivers; if I pedal, I can blow everyone else off the line. With my input, the bike accelerates to top speed in about 10 seconds. I've commuted home through the

In order to make room for the 2-leg kickstand, I gutted the front derailleur. All three chain rings are still installed, but I'm running on the center ring. The rear cassette is 8-speed; with the motor, that's still plenty of gearing options.

I'm planning to make a 2WD version out of my full-suspension mountain bike - as soon as I finish replacing the lightweight magnesium fork I exploded with a stout, triple-tree-style steel fork that will not snap. I'm also hoping to double up on the brakes, at least the rear wheel - using both the rim and a disc will help with the 50+ pounds of additional gear the e-bike components add, and gravity is always trying to kill you when downhilling.

Range is a tough question...at a sensible 15MPH, assisting the motor with pedaling, a couple of hours is easy. At 100% throttle, going uphill and downhill, with the amount of rolling and wind resistance produced by a full-sized 5chn3ll, range diminishes drastically...but there is still a lot of additional capacity that can be stuffed into the single battery case I currently have mounted on the bike simply by upgrading to cells with better energy density. It's not unlike my Corvette - it averages between 20 and 4 MPG depending on my lack of self control.

Understeer: You will hit the wall with the front end.
Oversteer: You will hit the wall with the rear end.
Horsepower: How hard you will hit the wall.
Torque: How far you will move the wall.

Gone hunting with Alec Baldwin and Dick Cheney. Back soon.

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32wildbilly
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Re: Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

Post by 32wildbilly » Tue Mar 19, 2019 9:48 am

5chn3ll wrote: Tue Mar 19, 2019 9:29 am Brakes: The Dew Deluxe came with standard rim brake, but also had the lugs for discs. I installed Shimano mechanical disc brakes a few years back; when I added the electric front wheel, I had to replace the caliper on the front fork with a low-profile caliper.

In addition to being more reliable in the wet than rim brakes, I was able to use a "standard" 26" mountain bike wheel instead of a 700c wheel - the slightly different diameter would be a major problem for rim braking, but the disc is the same regardless of which wheel it's used on - so I can swap the motorized wheel between all of our bicycles.

On the kickstand, the bike does a little over 40MPH; with my ungainly and decidedly non-aerodynamic organism onboard, top speed drops to about 35MPH. On battery only, I pull away from stoplights at least as fast as other drivers; if I pedal, I can blow everyone else off the line. With my input, the bike accelerates to top speed in about 10 seconds.

In order to make room for the 2-leg kickstand, I gutted the front derailleur. All three chain rings are still installed, but I'm running on the center ring. The rear cassette is 8-speed; with the motor, that's still plenty of gearing options.

I'm planning to make a 2WD version out of my full-suspension mountain bike - as soon as I finish replacing the lightweight magnesium fork I exploded with a stout, triple-tree-style steel fork that will not snap. I'm also hoping to double up on the brakes, at least the rear wheel - using both the rim and a disc will help with the 50+ pounds of additional gear the e-bike components add, and gravity is always trying to kill you when downhilling.

Range is a tough question...at a sensible 15MPH, assisting the motor with pedaling, a couple of hours is easy. At 100% throttle, going uphill and downhill, with the amount of wind resistance produced by a full-sized 5chn3ll, range diminishes drastically...but there is still a lot of additional capacity that can be stuffed into the single battery case I currently have mounted on the bike simply by upgrading to cells with better energy density. It's not unlike my Corvette - it averages between 20 and 4 MPG depending on my lack of self control.
I find your review Impressive and sometimes hilarious! 35 mph is fast on a bike!
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Re: Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

Post by gnat » Tue Mar 19, 2019 10:29 am

5chn3ll wrote: Tue Mar 19, 2019 9:29 am if I pedal, I can blow everyone else off the line.
What about a Viggen? Could you take a Viggen? :lol:

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5chn3ll
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Re: Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

Post by 5chn3ll » Tue Mar 19, 2019 10:39 am

Nobody beats a Viggen.

Understeer: You will hit the wall with the front end.
Oversteer: You will hit the wall with the rear end.
Horsepower: How hard you will hit the wall.
Torque: How far you will move the wall.

Gone hunting with Alec Baldwin and Dick Cheney. Back soon.

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Re: Ebike Conversion - My K2 Attack 2.0 w/ 48v 1000 watt front hub motor and 4x sealed lead-acid batteries

Post by 32wildbilly » Tue Mar 19, 2019 11:58 am

5chn3ll wrote: Tue Mar 19, 2019 10:39 am Nobody beats a Viggen.
You guys mean Vegan...right? :roll: :lol:
Never gonna make you cry...

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