Advertise on Bikeforums.net



User Tag List

Results 1 to 7 of 7
  1. #1
    or tarckeemoon, depending marqueemoon's Avatar
    Join Date
    Dec 2005
    Location
    the pesto of cities
    My Bikes
    Davidson Impulse, Merckx Titanium AX, Bruce Gordon Rock & Road, Cross Check custom build, On-One Il Pomino, Shawver Cycles cross, Zion 737, Mercian Vincitore, Brompton S1L, Charge Juicer
    Posts
    7,020
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    downtube shifters on Paul Thumbies - Anybody done it?

    I have a mostly-finished commuter and a pair of Thumbies sitting in the parts bin. This is a commuter, so friction shifting, upright position, and cheap are all good things. My lbs has a bin full of used downtube shifters that can be had for next to nothing (vs. $$$ for bar ends), and there are no braze-ons on the frame for downtubes there.

    I do have a Dremel and lots of time on my hands if surgery is needed to shorten the shifters.

    Any pics or advice would be greatly appreciated.

  2. #2
    coffeeeeee p4nh4ndle's Avatar
    Join Date
    Aug 2007
    Location
    somewhere in Pennsyl-tucky
    My Bikes
    all that I ride
    Posts
    238
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    the fillets on the index caps would have to be ground off flat. I also think that the dt levers pull cable in the opposite direction of bar ends, so the cable exits in a different direction, for which thumbies aren't optimized. but hey, it still might work.
    thumbies are good btw, I've got them now on my mtb.
    I'd say, "as good or better than gripshift shifting, maybe not quite as fast as rapidfire, but still good, more durable, and cheaper."

  3. #3
    or tarckeemoon, depending marqueemoon's Avatar
    Join Date
    Dec 2005
    Location
    the pesto of cities
    My Bikes
    Davidson Impulse, Merckx Titanium AX, Bruce Gordon Rock & Road, Cross Check custom build, On-One Il Pomino, Shawver Cycles cross, Zion 737, Mercian Vincitore, Brompton S1L, Charge Juicer
    Posts
    7,020
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by p4nh4ndle View Post
    the fillets on the index caps would have to be ground off flat.
    I'm afraid you lost me here.

    I did think about the cable pull issue and that worries me too. Then I compared the bossed on the Thumbies with the downtube bosses on my Cross Check. They're totally different sizes. Doh! I'm ok with mutilating a cheap downtube shifter, but I'm not willing to do any surgery on the Thumbies.

  4. #4
    Senior Member Grand Bois's Avatar
    Join Date
    Mar 2005
    Location
    Pinole, CA, USA
    Posts
    15,444
    Mentioned
    15 Post(s)
    Tagged
    0 Thread(s)
    Why don't you take your Thumbies to that lbs and see if there's anything in the bin that will work for you?

    I don't think there's a problem wih using downtube shifters instead of bar end shifters on the thumbies. I'm using Simplex Retrofriction downtube shifters as bar end shifters on Ultegra mounts. The mount is the same as on the Thumbies.


  5. #5
    coffeeeeee p4nh4ndle's Avatar
    Join Date
    Aug 2007
    Location
    somewhere in Pennsyl-tucky
    My Bikes
    all that I ride
    Posts
    238
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    nope, you're right. there isn't. I was mistaken.

    regarding caps and fillets: there's a plastic cap that's part of the indexing system for dt shifters. it's usually concave, to fit the profile of the downtube, hence "fillet."
    maybe i didn't use that the right way. oh well.
    I say it'll work. go for it.

  6. #6
    YOU ARE NOW TUNED IN No_Minkah's Avatar
    Join Date
    Jan 2006
    Location
    The City that Works
    Posts
    1,185
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Hey, newb question, but what exactly do Paul thumbies do? I can't figure it out from the Paul website. What are they for?

  7. #7
    Senior Member
    Join Date
    Apr 2006
    Location
    corpus christi,texas
    My Bikes
    canondale silk trail
    Posts
    346
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by No_Minkah View Post
    Hey, newb question, but what exactly do Paul thumbies do? I can't figure it out from the Paul website. What are they for?

    Basicly they are just a mounting bracket. They are used to position barend shifters on top of the handlebars instead of being inserted into the ends of the bars.

Posting Permissions

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