Advertise on Bikeforums.net



User Tag List

Results 1 to 14 of 14
  1. #1
    Bike ≠ Car ≠ Ped. BarracksSi's Avatar
    Join Date
    Jul 2007
    Location
    Washington, DC
    My Bikes
    Some bikes. Hell, they're all the same, ain't they?
    Posts
    13,857
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    New B&M generator-powered rack light

    While looking around for the 4DLite Plus for this thread, I saw this:

    http://bumm.de/index-e.html?docu/323e.htm

    They call it a Toplight Line, with a "LineTec" lens for its two LEDs. I think it's supposed to give better dispersion side-to-side but, more importantly, instead of appearing as a single point of light, it looks like a bar of light, which should help onlookers better estimate your distance and speed.

    I like my Selectra ( http://bumm.de/index-e.html?docu/320e.htm ), but this new one looks pretty cool. I'll see if I can get a hold of one in a couple months or so.

  2. #2
    Senior Member
    Join Date
    May 2009
    My Bikes
    S5 VWD
    Posts
    3,447
    Mentioned
    3 Post(s)
    Tagged
    1 Thread(s)
    Why go with a generator? Wouldn't rechargeable batteries be simpler, lighter and provide less drag?

  3. #3
    Scott n4zou's Avatar
    Join Date
    Jun 2006
    My Bikes
    Too Many
    Posts
    2,393
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by v70cat View Post
    Why go with a generator? Wouldn't rechargeable batteries be simpler, lighter and provide less drag?
    Batteries are not required; no need to worry about recharging them, purchasing new batteries when your old ones are worn out, and it's better for the environment.
    Drag is not very much even when using bottle type dynamos. After a few minutes of riding you forget the very slight drag imposed by the dynamo.
    [SIGPIC]http://www.bikeforums.net/image.php?type=sigpic&userid=57360&dateline=1197386754[/SIGPIC]
    It's easier to pick a Yankee tourist than a bail of cotton.

  4. #4
    your nightmare gal chipcom's Avatar
    Join Date
    Sep 2005
    Location
    The Cracker Factory
    Posts
    24,352
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by v70cat View Post
    Why go with a generator? Wouldn't rechargeable batteries be simpler, lighter and provide less drag?
    not having to mess with batteries is simpler.
    weight isn't much of an issue unless you are racing
    drag on modern dyno-hubs isn't worth worrying over, unless you are racing
    generator power is more Murphy-proof than battery power

  5. #5
    Genetics have failed me Scummer's Avatar
    Join Date
    Jun 2007
    Location
    Zorneding, Germany
    My Bikes
    Pedalforce CX1 & Trek Madone 5.9
    Posts
    2,830
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Darn it. Just after I purchased a XS plus for me and my wife a few weeks ago.

    And yes, a hub generator is definitely the way to go for multi-day touring rides.
    Gelato aficionado.

  6. #6
    Senior Member
    Join Date
    Jul 2008
    Location
    Minneapolis, MN
    Posts
    3,927
    Mentioned
    9 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by n4zou View Post
    Batteries are not required; no need to worry about recharging them, purchasing new batteries when your old ones are worn out, and it's better for the environment.
    Drag is not very much even when using bottle type dynamos. After a few minutes of riding you forget the very slight drag imposed by the dynamo.
    Back light also turns on automatically when you turn on the front dynamo light - one less switch to hit.

  7. #7
    Bike ≠ Car ≠ Ped. BarracksSi's Avatar
    Join Date
    Jul 2007
    Location
    Washington, DC
    My Bikes
    Some bikes. Hell, they're all the same, ain't they?
    Posts
    13,857
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The weight issue is negligible, too. If you want to get wild about it, you can get a dynohub built with a carbon rim.

    But, that's not relevant -- what's relevant is the weight of the lighting system. The weight of the dynohub (minus the weight of a regular front hub) and the weight of a typical battery pack seen on most worthwhile lights are basically the same, so, I'd say that the weight question is moot.

    http://www.supernova-lights.com/en/dynamowheels.html

    Quote Originally Posted by Scummer View Post
    Darn it. Just after I purchased a XS plus for me and my wife a few weeks ago.
    Yeah, that Toplight XS is what I had in mind to get (after browsing Peter White's and Harris Cyclery's pages), but the guy at the shop while I was in Germany last Christmas pulled a Selectra off the shelf and handed it straight to me. Three LEDs and a bigger reflector trumps one LED.

  8. #8
    Senior Member
    Join Date
    Jul 2008
    Location
    Minneapolis, MN
    Posts
    3,927
    Mentioned
    9 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by BarracksSi View Post
    The weight issue is negligible, too. If you want to get wild about it, you can get a dynohub built with a carbon rim.

    But, that's not relevant -- what's relevant is the weight of the lighting system. The weight of the dynohub (minus the weight of a regular front hub) and the weight of a typical battery pack seen on most worthwhile lights are basically the same, so, I'd say that the weight question is moot.

    http://www.supernova-lights.com/en/dynamowheels.html



    Yeah, that Toplight XS is what I had in mind to get (after browsing Peter White's and Harris Cyclery's pages), but the guy at the shop while I was in Germany last Christmas pulled a Selectra off the shelf and handed it straight to me. Three LEDs and a bigger reflector trumps one LED.
    Welll...it may be negligible in terms of real speed, but I recently from from the 28 spoke wheel on my stock, entry level Sequoia to a $150 dynamo front wheel. Granted, you can spend more money and definitely get a lighter wheel, not to mention a lighter dynamo hub. But my bike is definitely not as sprightly and light as it used to be.

  9. #9
    Bike ≠ Car ≠ Ped. BarracksSi's Avatar
    Join Date
    Jul 2007
    Location
    Washington, DC
    My Bikes
    Some bikes. Hell, they're all the same, ain't they?
    Posts
    13,857
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Probably the most complicated part of a generator setup is the wiring installation. But, the time spent doing that -- maybe 15-20 minutes, not in a hurry at all -- more than compensates for the time I've spent switching out batteries and checking them... and sometimes re-recharging them because they've sat dormant long enough to lose charge while the dynohub bike gets ridden more often.

    It doesn't make for good forum discussion, though, because it's literally set it and forget it -- I can come back in five years and say, "My lights still work and I haven't touched a battery." Boring.

    Anyway... the new light looks pretty neat, doesn't it? There aren't many images out there, just some PR stuff from Eurobike.

    http://www.eurobike-show.de/eb/press...e=detail&lg=en
    http://www.pd-f.de/component/option,...lection_id=528

    Oh, cool -- they're coming out with their own "Power Supply Unit":
    http://www.eurobike-show.de/eb/press...e=detail&lg=en
    http://bumm.de/index-e.html?docu/361e.htm
    Attached Images Attached Images

  10. #10
    Senior Member
    Join Date
    Jul 2008
    Location
    Minneapolis, MN
    Posts
    3,927
    Mentioned
    9 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by BarracksSi View Post
    Probably the most complicated part of a generator setup is the wiring installation. But, the time spent doing that -- maybe 15-20 minutes, not in a hurry at all -- more than compensates for the time I've spent switching out batteries and checking them... and sometimes re-recharging them because they've sat dormant long enough to lose charge while the dynohub bike gets ridden more often.

    It doesn't make for good forum discussion, though, because it's literally set it and forget it -- I can come back in five years and say, "My lights still work and I haven't touched a battery." Boring.

    Anyway... the new light looks pretty neat, doesn't it? There aren't many images out there, just some PR stuff from Eurobike.

    http://www.eurobike-show.de/eb/press...e=detail&lg=en
    http://www.pd-f.de/component/option,...lection_id=528

    Oh, cool -- they're coming out with their own "Power Supply Unit":
    http://www.eurobike-show.de/eb/press...e=detail&lg=en
    http://bumm.de/index-e.html?docu/361e.htm
    I definitely agree that the power supply unit is really, really, really cool.

    I, personally, have more of a "wait and see" attitude about the tail light.

  11. #11
    Junior Member
    Join Date
    Sep 2009
    Posts
    7
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yeah a generator is a good way to go, even if it's a sidewall dynamo. I've had both AXA and B&M; both are good. But it helps if you get tires with a sidewall tread strip (although it's not necessary with the B&M 'cause it can be fitted with a wire brush-type wheel). My tires are 1.5 Marathons, so a dynamo is the perfect solution for on-demand lighting. I've toured through many countries this way; tens-of-thousands of kilometers on both diamond frame and recumbent, which both have the same setup. I've always had the DToplight Plus with condenser and B&M headlight.

    Battery lighting is impractical because I tour mostly at night, and charging would be a problem sometimes. Having battery-powered front-and-back strobes for auxiliary is good though. They last forever. Plus I can switch-on the front steady beam for extra light when needed.

  12. #12
    Senior Member
    Join Date
    Aug 2006
    Posts
    1,952
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    These things CAN'T be as bright as a new LED, though - do they even push 200 lumens?
    =======================================
    Cervelo P2C Dura-Ace 2008

  13. #13
    your nightmare gal chipcom's Avatar
    Join Date
    Sep 2005
    Location
    The Cracker Factory
    Posts
    24,352
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by agarose2000 View Post
    These things CAN'T be as bright as a new LED, though - do they even push 200 lumens?
    They put out plenty of output for 'normal' night riding. But of course more light never hurt anyone, so you can always supplement with battery powered lights. When I commute on my Superbe I also run a P7 and a PBSF, in addition to the dynamo powered B&M head/tail lights. Redundant systems are never a bad thing.

  14. #14
    Bike ≠ Car ≠ Ped. BarracksSi's Avatar
    Join Date
    Jul 2007
    Location
    Washington, DC
    My Bikes
    Some bikes. Hell, they're all the same, ain't they?
    Posts
    13,857
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    After seeing lights like these "in the wild", I figured that they were bright enough, whether they had an LED or a filament bulb.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •