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sl-bs50-8 shimano dura ace bar end shifter compatibility?

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sl-bs50-8 shimano dura ace bar end shifter compatibility?

Old 10-19-15, 11:56 AM
  #1  
spectastic
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sl-bs50-8 shimano dura ace bar end shifter compatibility?

Im about to buy one of these. just got off the phone with a shimano rep. he says there shouldn't be any issues with the 8 speed friction/index shifters. however, i've not had the best experience with shimano reps knowing their stuff, and this one admitted that he's not too familiar with components this old.

I found this note on here: Shimano SL-BS64 8SPD Barend Shifters > Components > Drivetrain > Road Shifters | Jenson USA

it says it's not compatible with 8 speed DA but is compatible with 8 speed ultegra, 105, etc. anyone know what that's about?

Im trying to match an 8 speed shimano bar end shifter with a 8 speed shimano mtb rear derailleur (acera). just want to make sure the pull ratios are the same.
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Old 10-19-15, 12:16 PM
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jensonusa rep had to ask somebody in the office, but he said the 8 speed dura ace used a different pull ratio than the rest of the 8 speed stuff.. so I guess there's that. stupid dura ace.
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Old 10-19-15, 12:29 PM
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Yes, there is a lot of confusion with the old Dura Ace stuff. See: Shimano Dura-Ace Compatibility

Basically, until Shimano went to 9-speed, Dura Ace used a different cable pull than the rest of the Shimano lineup. So these shifters will work fine with your Acera RD. The description should really include the Ultegra designation which differentiates them from being a Dura Ace part.
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Old 10-19-15, 12:37 PM
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Originally Posted by FastJake View Post
Yes, there is a lot of confusion with the old Dura Ace stuff. See: Shimano Dura-Ace Compatibility

Basically, until Shimano went to 9-speed, Dura Ace used a different cable pull than the rest of the Shimano lineup. So these shifters will work fine with your Acera RD. The description should really include the Ultegra designation which differentiates them from being a Dura Ace part.
huh?
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Old 10-19-15, 12:48 PM
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Originally Posted by spectastic View Post
huh?
the sl-bs50-8 shifter is a non-Dura Ace product, thus compatible with other non-Dura Ace components. The OP title is confusing.

The photo shows a sticker emphasizing non-Dura Ace compatibility.
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Old 10-19-15, 12:52 PM
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I'm confused by what you are buying.
A DuraAce 8 speed bar end shifter will not work with anything but a DuraAce 8 speed rear derailleur.
An Ultegra 8 speed bar end shifter, as far as I know all you can buy currently, will work with almost any Shimano rear derailleur except for DuraAce less than 9 speed, MTB 10 speed and 11 speed.
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Old 10-19-15, 01:10 PM
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Originally Posted by spectastic View Post
huh?
The bar-end shifters in your link are NOT Dura Ace, so they will work fine with your Acera RD and pretty much anything else.
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Old 10-19-15, 01:31 PM
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to clarify, I was thinking on buying sl-bs50-8 dura ace bar end shifters. I fumbled around and found the bs64 shifters, and noticed that they're not compatible with 8 speed dura ace. i realize now i should be looking for something 8 speed and NOT dura ace.
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Old 10-19-15, 04:06 PM
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Shimano Ultegra 6480 Triple 8sp Bar End Shifter | Chain Reaction Cycles

US$58

Shimano Tiagra R400 8 Speed Down Tube Shifter | Chain Reaction Cycles

US$38

That's what you want
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Old 10-19-15, 04:33 PM
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Probably want a MTB RD anyhow..

some eras of D-A were a smidge different from their other stuff..

you don't need the bling anyhow.

All the same thing but they called 9 speed bar ends 'D-A' and 8 'Ultegra', but it was just the detent spacing on the right one ..
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Old 10-19-15, 04:50 PM
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Not often mentioned about first gen SIS Dura Ace was that it also used a different cable diameter the every other Shimano SIS system has since.

A little perspective is needed here to understand what was Shimano's deal when SIS first came onto the market. Shimano created some new designs (or at least claimed to be new. Any historian of cycling design knows better) and used some existing stuff with the first gen DA SIS. Since cable pull ratio wasn't a discussed design aspect (as it was not needed to be specific with friction shifting) there was no reason for the DA to be the same as any other system. It was it's own standard. As to the cable diameter that's an easy one to understand from two aspects. One was that the competition, Campy, used a thick cable. So there was a concern that a too skinny cable (as the 1.2mm diameter was considered at first) wasn't going to be tough enough for the pro racers. the second point was that the availability of those too skinny cables (1.2mm) wasn't common place back then. In fact wasn't even a factor when shops ordered cables, only head shape, length and weave were the factors we looked at (and SS material wasn't yet on the radar of most riders).

So to now say that "what was Shimano thinking bring out a system that was so different then every other SIS system?" has no merit. There was no other SIS system. Does this need repeating? One might say "what was Shimano doing by bring out their nest SIS systems with differing design aspects that weren't compatible with the first gen DA?" But to say that would deny Shimano from being able to improve their stuff. Just as with DI stuff the first gen set the market standard but has been surpassed by redesigns and lower cost systems that now do share cross compatibility. Andy.
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Old 09-14-16, 08:29 PM
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Ok I have a good reason to bump this

I tried asking the question before, but I was using the mobile platform and for some reason it got posted in the BMX forum. My question is this: What do the SL-BS50-8 shifters look like? I have a pair, 8s, that are missing the shifter boots that have the model number on the underside (I'm in the process of Plasti-Dipping them, seems to be working nicely) and the sticker and writing is worn off. HOWEVER, the outline of where the sticker used to be is on the LEFT shifter rather than the right. The plastic bezels are grey. That is all the info I have on them, are these the 8s Dura Ace? Seems like there is also less travel per shift than the SL-BS64's that I have on another bike...
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