Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 12-14-07, 06:48 PM   #1
marqueemoon
or tarckeemoon, depending
Thread Starter
 
marqueemoon's Avatar
 
Join Date: Dec 2005
Location: the pesto of cities
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)
Quoted: 0 Post(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.
marqueemoon is offline   Reply With Quote
Old 12-14-07, 08:33 PM   #2
p4nh4ndle
coffeeeeee
 
p4nh4ndle's Avatar
 
Join Date: Aug 2007
Location: somewhere in Pennsyl-tucky
Bikes: all that I ride
Posts: 238
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(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."
p4nh4ndle is offline   Reply With Quote
Old 12-14-07, 08:45 PM   #3
marqueemoon
or tarckeemoon, depending
Thread Starter
 
marqueemoon's Avatar
 
Join Date: Dec 2005
Location: the pesto of cities
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)
Quoted: 0 Post(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.
marqueemoon is offline   Reply With Quote
Old 12-14-07, 08:53 PM   #4
Grand Bois
Senior Member
 
Grand Bois's Avatar
 
Join Date: Mar 2005
Location: Pinole, CA, USA
Bikes:
Posts: 16,684
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 86 Post(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.

Grand Bois is online now   Reply With Quote
Old 12-14-07, 09:51 PM   #5
p4nh4ndle
coffeeeeee
 
p4nh4ndle's Avatar
 
Join Date: Aug 2007
Location: somewhere in Pennsyl-tucky
Bikes: all that I ride
Posts: 238
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(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.
p4nh4ndle is offline   Reply With Quote
Old 12-19-07, 07:37 PM   #6
No_Minkah
YOU ARE NOW TUNED IN
 
No_Minkah's Avatar
 
Join Date: Jan 2006
Location: The City that Works
Bikes:
Posts: 1,185
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(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?
No_Minkah is offline   Reply With Quote
Old 12-19-07, 11:18 PM   #7
carlton
Senior Member
 
Join Date: Apr 2006
Location: corpus christi,texas
Bikes: canondale silk trail
Posts: 347
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(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.
carlton is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 11:51 AM.