what is in this bike (an elecTrek)? Voltage for hubs?

General Discussion about electric bicycles.
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DrInnovation   100 W

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what is in this bike (an elecTrek)? Voltage for hubs?

Post by DrInnovation » May 11 2016 9:17pm

Looking to replace my Lashout (it runs fine but I keep having to replace the planetary gear .. guess its my 200+ pounds and 10% grades.. (I'll fix it up and sell it for lighter people or flatlanders..)

Looking for an inexpensive but reliable replacement. Can anyone identify this bike
Image
http://boulder.craigslist.org/bik/5554939266.htm
The owner does not know what is the drive/watt or battery type.. I need something that can climb big hills (but short commute). It look to me like some type of mid-drive. And in general bikes Trek is a decent brand. I


Unrelated.. I'm looking at some hubs as well. All the 1000w seems to be 48v. If just do a hub on an existing bike I'd hope to reuse by current Battery which is LiPo +BMS system, 7s (25.9.. nominal up to about 30..)
In my current commute I normally charge to about 29.5 and discharge to 28 or so.
Could a 48v run on 25-30v? Can one run a 36v hub on 25-30v ? Is so what is the power loss for hill climbing?
Can most 24v hubs handle 30v or so?
Owner of a Crystalyte 4012/409 with 10aH 16s Headway on a old huffy frame. Its not fast but it climbs my daily commute up 8% and 10% grades nicely. Washout frame with a "e-bike" front-drive hub with a home-built 18650-based 20ah-36v. My bigger "E-ride" is a chevy volt.

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dogman dan   100 GW

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Re: what is in this bike (an elecTrek)? Voltage for hubs?

Post by dogman dan » May 12 2016 7:05am

The "48v" hubs will need at least 12s battery. the low voltage cutoff will be too high for any less.

Some bikes/kits can run 36 or 48v. they can run on 10 s minimum.

The trek is likely to be a very old school system. Likely 24v. it should be a worm drive type mid drive, notoriously loud.

I gave away a similar one last year, showing how much I value that kind of bike. But it will climb a hill. That's for sure, like all mid drives can. Just watch out for amp spikes from too high a gear, which blows controllers real easy on this type bike.

I'm just saying, 50 bucks tops, if you buy that thing.

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DrInnovation   100 W

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Re: what is in this bike (an elecTrek)? Voltage for hubs?

Post by DrInnovation » May 12 2016 7:19am

dogman dan wrote:The "48v" hubs will need at least 12s battery. the low voltage cutoff will be too high for any less.

Some bikes/kits can run 36 or 48v. they can run on 10 s minimum.

The trek is likely to be a very old school system. Likely 24v. it should be a worm drive type mid drive, notoriously loud.

I gave away a similar one last year, showing how much I value that kind of bike. But it will climb a hill. That's for sure, like all mid drives can. Just watch out for amp spikes from too high a gear, which blows controllers real easy on this type bike.

I'm just saying, 50 bucks tops, if you buy that thing.
Thanks.. since they want $420 for the trek I'll keep looking. Don't want something in an integrated but easily destroyed controller.
Owner of a Crystalyte 4012/409 with 10aH 16s Headway on a old huffy frame. Its not fast but it climbs my daily commute up 8% and 10% grades nicely. Washout frame with a "e-bike" front-drive hub with a home-built 18650-based 20ah-36v. My bigger "E-ride" is a chevy volt.

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