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Shimano 4.5mm Type-A Shifters / Downtube Braze-ons - What are my options?

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Shimano 4.5mm Type-A Shifters / Downtube Braze-ons - What are my options?

Old 11-09-11, 07:09 PM
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Shimano 4.5mm Type-A Shifters / Downtube Braze-ons - What are my options?




Right now, I'm using the Shimano Z408 shifters that came with the bike, which work well. Inevitably at some point I will decide to change them out.

I know I could hack up a pair of cable stops if I wanted to use bar-end shifters. I can also tap the M4.5 to M5.

But what about that little tab and the lack of a square for most shifters to fit around? I like downtube shifters, and I have a bag full of nice (shiny) ones.

Curious to see if there's an easy solution. Thanks.
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Old 11-09-11, 07:47 PM
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How about the cable stop pieces that fit the down tube bosses? Run the cable housings from the barcons into the stops. There was a thread about the adapters for the square bosses to use other shifters a while back.

Bill
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Old 11-09-11, 08:10 PM
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Originally Posted by qcpmsame
How about the cable stop pieces that fit the down tube bosses? Run the cable housings from the barcons into the stops. There was a thread about the adapters for the square bosses to use other shifters a while back.

Bill
Yeah, I'm pretty sure I can make cable stops work. What about just normal shifters?
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Old 11-12-13, 06:06 PM
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Anyone have SIS 7/8 speed shifters for this braze ons?
Namely the Shimano 600 SL-6400 7/8 Shifter.

Last edited by avhed; 11-12-13 at 06:17 PM.
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Old 11-12-13, 08:40 PM
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Won't fit. Unless you want to grind away some at the braze-ons and then re-tap the threads to 5mm, you're stuck with either changing a set of cable stops to fit and then using STI's or bar-end shifters, or using nice Type -A's like Shimano 600 6207's. In order to use SIS DT shifters, you gotta grind. Sad, but there you have it.
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Old 11-12-13, 09:03 PM
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find the correct friction shifters.
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Old 11-19-13, 08:55 PM
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Originally Posted by Bianchigirll
find the correct friction shifters.
I am still using the original
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Old 11-19-13, 09:01 PM
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Originally Posted by Bianchigirll
find the correct friction shifters.
I am still using the original SL-7210 I purchased in 1980.

For those not actually following this thread, this is what I am after: The SL-6400-FAI for the original M4.5

Attached Images

Last edited by avhed; 11-26-13 at 06:57 PM.
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Old 11-26-13, 07:05 PM
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Last edited by avhed; 11-26-13 at 07:17 PM.
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Old 11-26-13, 07:12 PM
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There are a more SIS Shifters that fit the M4.5 :
The second picture above is the SL-1051 FAI
The third is the SL-7401 that has a different cable rate pull than my 600 rear derailleur needs.
The fourth is a 600EX that is only a 6 speed shifter. I need a 7.

The first pic is to show where on the shifter the size is marked M.5 or M4.5
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Old 11-27-13, 06:35 AM
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The only shifters that fit on that frame are the shimano style from the early '80s, I have tried and so have hundreds of others. There are a few threads on modifying housing stops so you could use barend or 'brifter' type shifters but otherwise you need to find a pair of the old Golden Arrow (early 105) Abursque (early 600) Dura Ace or Deore, and a few others.

I am not sure anyone remembers why shimano did this. I believe by the late 70's most things like shifter bosses, derailleur hangers, and threadings (especially BBs) were becoming standardized in the industry, then along comes this. I suspect it was an early attempt by shimano for their Shimano Total Integration (STI) scheme, where by only shimano parts work with shimano parts. Most of their big developments aside from improving performance were to make sure you only use shimano parts on your bike. SIS? You break your 105 RD there is no upgrading to CampI if you want to keep tha5t indexing. Shimano Linear Respnse was a way to not only inprove brake performace but ensure your brakes didn't feel right is you tried to use CampI levers w/ shimano calipers and vise/versa. OOOPs sorry I'll get off my shimano bashing soap box.
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Old 11-27-13, 07:10 AM
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Same issue I am having with my Ross. I converted it to flat bar so Im just using a cable stop until I can find the right set of 600 shifters.
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Old 11-27-13, 12:31 PM
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To the best of my knowledge, NONE of the indexing shift levers used 4.5mm screws or were made to fit the Shimano-specific braze-ons. In fact, Shimano even made an adaptor set (including 5mm screws) to make Shimano-specific lever sets fit the 'Italian' square braze-ons that became industry standard for everyone (including Shimano after 1986). Could be wrong, but if they are out there I've never seen 'em.

If you're willing to modify the braze-on itself, check out this thread from last July. While not as pretty as a modern braze-on, the end result works and is hidden by the DT shift lever or cable stop:
https://www.bikeforums.net/showthread...to-later-style
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Last edited by rccardr; 11-27-13 at 12:37 PM.
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Old 12-04-13, 07:56 PM
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Velobase shows one shifter model per Shimano line in 1986-1991. (600, 105, Dura ace, & Ultegra) all pictured in post #9 of this thread.
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Old 12-04-13, 09:12 PM
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Yes, I see the pictures (one of which clearly shows an M5 bolt, not a 4.5) but I've never actually seen any 4.5 bolts or older mount style used on a Shimano DT shifter after the 6207 series of Shimano 600. Velobase notwithstanding.

And I've seen a LOT of DT Shimano shifters.
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Old 12-10-13, 07:09 PM
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Originally Posted by rccardr
Yes, I see the pictures (one of which clearly shows an M5 bolt, not a 4.5) but I've never actually seen any 4.5 bolts or older mount style used on a Shimano DT shifter after the 6207 series of Shimano 600. Velobase notwithstanding.

And I've seen a LOT of DT Shimano shifters.
I assume they were made for guys like me who got M4.5 put on a custom frame in the early 80s and wanted to upgrade.
I was not mass production.

Last edited by avhed; 06-19-14 at 09:02 PM.
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