Advertise on Bikeforums.net



User Tag List

Page 2 of 2 FirstFirst 12
Results 26 to 32 of 32
  1. #26
    Senior Member
    Join Date
    Sep 2009
    Location
    Central Illinois
    My Bikes
    Trek Speed Concept 9.9, 2011 Calfee Tetra Tandem
    Posts
    912
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    David at Nimble (www.nimble.net) told me that in a few months he will have a new rim that will be strong enough for tandem use. He has ridden and raced tandems so he knows what kind of wheels will and will not work.

  2. #27
    Senior Member diabloridr's Avatar
    Join Date
    Dec 2010
    Location
    Central Coast, California, USA
    My Bikes
    Co-Motion Speedster, Calfee Dragonfly, Ancient Sun Fixie, Trek 5900, Trek 9800
    Posts
    309
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by waynesulak View Post

    For us I want a greater margin of safety than single wheels provide however if I were riding a flat 20 mile time trial on a good road and we were highly motivated I can see taking the risk to buy just a little more speed. The questions are: what is your risk tolerance and at what price speed?
    Actually, for a *FLAT* 20 mile time trial, safety vs. speed would not really be a consideration, since the design must be optimized for aerodynamics, not weight.

    Designing for hill climbs, rolling terrain, crits, etc is whole 'nother proposition.

  3. #28
    Senior Member
    Join Date
    Oct 2009
    Posts
    947
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by diabloridr View Post
    Actually, for a *FLAT* 20 mile time trial, safety vs. speed would not really be a consideration, since the design must be optimized for aerodynamics, not weight.

    Designing for hill climbs, rolling terrain, crits, etc is whole 'nother proposition.
    The number, type, and shape of spokes influences the wheels weight and aerodynamics. To make the wheels stronger with more spokes and/or round spokes will also cost you in aero drag.
    What you say would be true though for wheels like discs and tri spokes.

  4. #29
    Senior Member waynesulak's Avatar
    Join Date
    Jan 2008
    Location
    Ft Worth, TX
    My Bikes
    650B tandem converted from Santana Arriva, Santana Noventa, Boulder Bicycle 700C, Gunnar Sport, Trek TX700,
    Posts
    1,732
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by diabloridr View Post
    Actually, for a *FLAT* 20 mile time trial, safety vs. speed would not really be a consideration, since the design must be optimized for aerodynamics, not weight.

    Designing for hill climbs, rolling terrain, crits, etc is whole 'nother proposition.
    I agree. I should not have said FLAT.

    Wayne

  5. #30
    Tandem Vincitur Ritterview's Avatar
    Join Date
    Sep 2005
    Location
    Northern California
    My Bikes
    BMC Pro Machine SLC01, Specialized Globe, Burley Rock 'N Roll tandem, Calfee Dragonfly tandem.
    Posts
    3,231
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Jason Woznick, Fairwheel
    I’ve done some pretty light tandem wheels, the lightest being a King 145 on Enve 45 tubulars with 28 DB spokes in the rear. This is for a pair weighing about 280 pounds. But again these I wouldn’t recommend for most people.

    I also wouldn’t feel comfortable recommending your wheels [ENVE carbon clinchers] to others. It’s not necessarily a strength issue that I have with them so much as a braking issue. I still really think carbon clinchers with rim brakes is not a good thing on a single bike, but can be really dangerous on a tandem. The King/Enve 45 set we built was tubular rather than clincher and used disc brakes rather than rim brakes.


    Fairwheel has a Flickr site, and some new tubular tandem wheels were just posted in their gallery. This may be the wheels Jason refers to, although the spokes are Sapim CX.



    Chris King/Enve tandem wheelset

    The rear hub is a 28h 145mm spaced King disc hub laced 3x with Sapim cx-speed spokes. The front is a King Classic hub 28h also laced 3x with cx-speed spokes. The cx-speed spokes are stiffer and stronger version on the cx-ray.





    Chris King 145mm Tandem disc hub

    Cool finned disc mount





    Chris King 145mm Tandem disc rear hub, Enve 45mm tubular rim and Sapim cx-speed spokes.





    Chris King Classic front hub, Enve 45mm tubular rim and Sapim cx-speed spokes.

  6. #31
    PMK
    PMK is offline
    Senior Member PMK's Avatar
    Join Date
    May 2008
    Location
    Royal Palm Beach, Florida
    My Bikes
    2006 Co-Motion Roadster (Flat Bars, Discs, Carbon Fork), Some 1/2 bikes and a couple of KTM's
    Posts
    1,119
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Dean V View Post
    The number, type, and shape of spokes influences the wheels weight and aerodynamics. To make the wheels stronger with more spokes and/or round spokes will also cost you in aero drag.
    What you say would be true though for wheels like discs and tri spokes.
    So being curious, where do middle of the spectrum wheel builds fit? Number of spokes / wheel aerodynamic profile / and weight?

    PK
    2006 Co-Motion Roadster, flat bars, discs and carbon fibre fork, size 22 / 19
    2006 Ventana ECDM full suspension mountain tandem
    Some single bikes and a couple of KTM's
    And most important, someone special that enjoys them with me (except the KTM's)

  7. #32
    PMK
    PMK is offline
    Senior Member PMK's Avatar
    Join Date
    May 2008
    Location
    Royal Palm Beach, Florida
    My Bikes
    2006 Co-Motion Roadster (Flat Bars, Discs, Carbon Fork), Some 1/2 bikes and a couple of KTM's
    Posts
    1,119
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Ritterview View Post
    Fairwheel has a Flickr site, and some new tubular tandem wheels were just posted in their gallery. This may be the wheels Jason refers to, although the spokes are Sapim CX.



    Chris King/Enve tandem wheelset

    The rear hub is a 28h 145mm spaced King disc hub laced 3x with Sapim cx-speed spokes. The front is a King Classic hub 28h also laced 3x with cx-speed spokes. The cx-speed spokes are stiffer and stronger version on the cx-ray.





    Chris King 145mm Tandem disc hub

    Cool finned disc mount





    Chris King 145mm Tandem disc rear hub, Enve 45mm tubular rim and Sapim cx-speed spokes.





    Chris King Classic front hub, Enve 45mm tubular rim and Sapim cx-speed spokes.
    I was recently asked to repair a carbon tubular Zipp wheel. This was a rental race wheel from my friends shop. Having seen the Zipp damaged tubular, and damage assessed / repaired carbon clincher rims , I will say the tubulars should be ridden with a delicate touch and reasonable amount of tire (protection) unless the terrain is very smooth.

    Nice wheels, we could not ride them, but nice none the less. I hope the owners get many trouble free miles from them.

    PK
    2006 Co-Motion Roadster, flat bars, discs and carbon fibre fork, size 22 / 19
    2006 Ventana ECDM full suspension mountain tandem
    Some single bikes and a couple of KTM's
    And most important, someone special that enjoys them with me (except the KTM's)

Page 2 of 2 FirstFirst 12

Posting Permissions

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