Downtube Shifters and different brazeon mount types

[mikeg]

Hi all,

Cutting a long story short in converting a tange DB alloy frame bike from down tube to STI shifters, I have found out there are 2 types of brazeon mounts, the square type which the fit available cable housing stop adapters, and the type that is on this frame, a keyhole shaped brazeon mount.

Now the DT shifters that are on this keyhole type are Shimano 600 friction levers (for 6 speed), and if I don't complete the conversion intended, then I would like to substitute the DT shifters with indexed 6/7 speed type.

And to my question:

Are there indexed type DT shifters that will fit the keyhole type of brazeon mount?

Mike

[edit] Also the thread on the keyhole type is different (doesn't appear to be metric) and slightly smaller in diameter

[GaryF]

I can't recall the keyhole brazeon mounts. I suppose a photo is not possible?

I have some 6 speed Shimano shifters that work with the square based brazeon's and indexed Suntour and Campagnolo that work with square based brazeon's but i've never seen the keyhole type 6 speed brazeon.

My guess would be that the the 6/7 speed down tube shifters only attached to the square based bosses.

[mikeg]

I can't recall the keyhole brazeon mounts. I suppose a photo is is not possible?

I have some 6 speed Shimano shifters that work with the square based brazeon's and indexed Suntour and Campagnolo that work with square based brazeon's but i've never seen the keyhole type 6 speed brazeon.

My guess would be that the the 6/7 speed down tube shifters only attached to the square based bosses.

I do have a not very good phone camera shot of the braze-on, but not enough post count

Mike

[mikeg]

I can't recall the keyhole brazeon mounts. I suppose a photo is is not possible?

I have some 6 speed Shimano shifters that work with the square based brazeon's and indexed Suntour and Campagnolo that work with square based brazeon's but i've never seen the keyhole type 6 speed brazeon.

My guess would be that the the 6/7 speed down tube shifters only attached to the square based bosses.

I do have a not very good phone camera shot of the braze-on, but not enough post count

Mike

Have just taken same better resolution photos

and increase the post count while I am at it

Mike

[stryker84]

Or send them to a moderator (I forget which ones) to help you in posting them.

[mikeg]

I can't recall the keyhole brazeon mounts. I suppose a photo is is not possible?

the style is probably not called keyhole, but the shape somewhat keyhole shaped.

Mike

[mikeg]

Lets see if I can now post some images of the braze-on!

Did not work this was post no 11

Mike

[mikeg]

Lets see if I can now post some images of the braze-on!

Mike

Mike

[edit] Hooray, finally!!!

[Minority]

Hi Mike,

I am fairly sure that the indexed DT shifters I had to go with some Shimano RSX stuff were that style mount. I'll check when I get home tonight.

[GaryF]

Hi Mike,

I am fairly sure that the indexed DT shifters I had to go with some Shimano RSX stuff were that style mount. I'll check when I get home tonight.

Mike, thanks for the photo's - I haven't seen them before. I'll be interested in what Minority turns up.

[Minority]

Sorry Mike,
Obviously my memory is failing along with the rest of the body!

I would think you could carefully file the Shimano shifter to fit the "keyhole" protrusion, but not as standard.

Good luck with your hunt!

[MichaelB]

Hi Mike,

I am fairly sure that the indexed DT shifters I had to go with some Shimano RSX stuff were that style mount. I'll check when I get home tonight.

Mike, thanks for the photo's - I haven't seen them before. I'll be interested in what Minority turns up.

These look very similar to the style of braze-ons that I have seen on a late 90's Steel Cinelli frame.

Some people think that you can get adjusters to suit these so that you can use the modern day shifters - is this true ?