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


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gnat
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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 » Fri Nov 02, 2018 8:59 am

You do know that one of the main purposes of riding a bike is to get exercise right? (which is coincidentally the top reason I don't ride one :lol: )

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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 » Fri Nov 02, 2018 9:06 am

Heh. Yeah. My office is only about 5 miles from my house, but I'm WAY too lazy to bike up the two big-ass hills between here and there.

I need to mount the sealed batteries - planning to do 2 on each side of the rear wheel, pannier-style. The lead-acid batteries are heavy, but they're too readily available to ignore given how much lithium batteries cost. Rack-mount uninterruptible power supply units typically have 4 12-volt batteries wired to make 48 volts. Plus I'm fat - an extra 15 pounds of battery is NOT going to be the make/break point for the project.

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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 Kalashnikov » Fri Nov 02, 2018 10:01 am

Americans.
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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 » Fri Nov 02, 2018 12:40 pm

5chn3ll wrote:
Fri Nov 02, 2018 9:06 am
Heh. Yeah. My office is only about 5 miles from my house, but I'm WAY too lazy to bike up the two big-ass hills between here and there.

I need to mount the sealed batteries - planning to do 2 on each side of the rear wheel, pannier-style. The lead-acid batteries are heavy, but they're too readily available to ignore given how much lithium batteries cost. Rack-mount uninterruptible power supply units typically have 4 12-volt batteries wired to make 48 volts. Plus I'm fat - an extra 15 pounds of battery is NOT going to be the make/break point for the project.
How cool is that!!?? If you lean back you can probably do one Hell of a burn-out with that dude!

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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 » Fri Nov 02, 2018 5:23 pm

Public Service Announcement: if your suspension fork has magnesium lowers, you'll want to replace those. Axe me how I know.
20181102_172106.jpg

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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 » Fri Nov 02, 2018 6:02 pm

5chn3ll wrote:
Fri Nov 02, 2018 5:23 pm
Public Service Announcement: if your suspension fork has magnesium lowers, you'll want to replace those. Axe me how I know.

20181102_172106.jpg
Any road rash?

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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 » Sat Nov 03, 2018 10:23 am

You are the Hoovie of the bicycle world.
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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 KoB » Sat Nov 03, 2018 11:55 am

5chn3ll wrote:
Fri Nov 02, 2018 5:23 pm
Public Service Announcement: if your suspension fork has magnesium lowers, you'll want to replace those. Axe me how I know.
If you haven’t already fixed this, I’d recommend ditching the suspension fork entirely. A suspension-corrected cro-moly fork will be lighter than the suspension fork and far stronger. Both Surly and Soma make good, solid suspension-correction forks.

You need to get a fork with the correct axle-to-crown length to keep the original frame geometry. You can find tables online that list the correct fork size based on wheel size and fork travel.

For my hybrid — 700c wheels and 50mm of suspension travel — the correct fork had A-to-C of approximately 465mm.
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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 » Sat Nov 03, 2018 6:52 pm

Extreme_Chopper_Bicycle_-_panoramio.jpg
www.kansascityautomuseum.com
Current:
2002 996TT X50, Guards Red
1987 928S4 Guards Red
1987 951 Guards Red

2006 955S Arctic Silver
2006 955S Lapis Blue
Gone but not forgotten: 1999 996 C4 Aerokit Black; 1990 964 C2 Guards Red

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