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Thread: The Bicycling thread

  1. #106
    Debbie's Servant Lee's Avatar
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    May 2003
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    SW Iowa
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    Quote Originally Posted by wildbears View Post
    Our next ride may be a recumbent Terra Trike Tandem with electric assist.

    As these are low to the ground with low visibility, we would restrict our riding to bike trails.

    This model decouples for easy transport.
    I was not able to find the electric assist tandem on the Terra Trike site.
    Lee
    2016 R1200RS
    MOA # 30878
    Past BMW Bikes: 2011 K1300S, 2003 K1200RS, 1991 K75S, 1987 K75T, 1984 R100RT

  2. #107

    TerraTrike with Electric Assist

    TerraTrike has two models that come with electric assist now, but these are singles.

    It might be that you could kit one of these with a TerraTrike single up front. TerraTrike does offer kits to make a single into a tandem. Not sure about using one of these electric assist models.

    Or you could go aftermarket at a good bike shop.

    https://www.ebikekit.com/blogs/news/...version-system

    Electric assist on a tandem may only provide modest assist but enough to keep the "stoker" from being overtaxed if the other rider tires out.

    I was recently left in the dust by a pair of octagenarians on TerraTrikes singles, one with assist. In my defence, it had been a long day.

  3. #108
    Registered User
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    Sep 2015
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    Birmingham, AL
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    I own a bicycle shop, specializing in tandems & recumbents. About 30 days ago I converted a CaTrike to "e-assist", using a Bafang kit. This is a mid-drive unit, and replaced the front crankset. You lose the double/triple crankset, giving you a 1x setup. However, the Bafang offers 1-3-5-9 levels of assist (IIRC), plus a "throttle" to help you up the hills when your assist isn't enough. To put the Bafang on a tandem, you'd need to remove the front BB/crank and convert your tandem to same-side drive, again losing at least one, probably 2 chainrings from the back crankset. If I were to convert a tandem, I'd drop the rear crankset to a single drive ring, install an 11-speed cassette on the rear wheel (you can use an 11/40 11-sp cassette on a "10-speed" road wheel), and install the battery on the front down tube.

    Bafang kits add about 15 pounds to the weight of a bike, but you do remove a pound or so by removing the extra chainring(s) and front derailleur.

    YMMV
    J Goertz
    BMW MOAL
    2015 BMW R1200RT
    2012 Triumph Bonneville SE

  4. #109
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    Any safety concerns for the e-bikes? I ride a roadie mostly on park land, one circuit about 16 miles. This season, more than once, saw e-bikes scooting along at a pace way faster than the rider seemed capable of controlling. I thought, " How is that rider passing me on this hill?" Then I saw the battery bulge.

    Safety is always on my mind not because of my age but because of liability. Also the laws posted everywhere saying, "No motorized vehicles." Trails are multiuser sometimes with horse traffic in a few areas. Not unusual to see skate boarders, inline skaters, lots of dogs on the retracting leashes, joggers, cross country skiing on wheels, all of which are mostly on the weekends.

    Personally cycling seems great aerobic with human motor. Don't know how e-bikes fit in to cycling. Not to mention ear buds. Saw a rider using iPhone too. Is cycling insurance in our future?

  5. #110
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    Great question! I wish I could answer it definitively. However, state legislators are wrestling with how to treat these machines -- are they bicycles or low-powered motorcycles? I've resisted them in my shop, only do this conversion because the owner of the bike bought the Bafang kit for me to install. The owner needs the e-assist to ride, as he's battling stage 4 cancer and is beaten down by treatments.
    J Goertz
    BMW MOAL
    2015 BMW R1200RT
    2012 Triumph Bonneville SE

  6. #111

    Recumbent tandem conversion to electric...

    Quote Originally Posted by jgoertz View Post
    I own a bicycle shop, specializing in tandems & recumbents. ....
    Good info.

    Thanks.

    I would be doing most of the work with the wife and I riding together.

    The electric assist will allow more time and distance together.

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