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Silly question regarding 10-speed bar-end shifters

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Silly question regarding 10-speed bar-end shifters

Old 01-21-10, 10:31 PM
  #1  
glittermoomin
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Silly question regarding 10-speed bar-end shifters

Hi there all!

I have a silly novice-type question regarding ten-speed bar-end shifters.

I just purchased a project bike to do up - a gorgeous red Schwinn World ten-speed road-style bicycle - which I'm hoping to convert to an upright commuter ride.

To do this, I'd like to switch out the drop bars for more back-friendly albatross bars, and at the same time, replace the dodgy old-school friction stem shifters with lovely, wonderful, smooth, no-hassle bar-end shifters. I have bar-end shifters on my Trek 520 touring bike, and love them.

My question is this....

I've done online searches for ten-speed bar-end shifters, and the best ones seem to be Shimano's Dura-Ace 10-speed bar end shifters SL-BS79 - https://www.bikesomewhere.com/bikesom...4049/30287?g=1

Okay, here's the silly part of my question..... are "ten speed shifters" designed for ten speed bicycles?

The only reason I ask this, is my Trek 520 has 21 gears, and yet it uses Shimano Dura-Ace, bar end NINE speed shifters. Surely, it would use 21-speed shifters, riiiight? The rear cog of my Trek has nine gears, but the whole bike has 21 gears.

So.... should I be looking for five-speed bar end shifters for my little Schwinn ten speed, because its rear cog has five speeds?

Or.... am I missing something? (Go on, humour me!) I'm just a little flummoxed. Any help anybody could offer would be very very greatly appreciated!

Thankyou so much.
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Old 01-21-10, 10:59 PM
  #2  
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Originally Posted by glittermoomin View Post
Hi there all!

I have a silly novice-type question regarding ten-speed bar-end shifters.

I just purchased a project bike to do up - a gorgeous red Schwinn World ten-speed road-style bicycle - which I'm hoping to convert to an upright commuter ride.

To do this, I'd like to switch out the drop bars for more back-friendly albatross bars, and at the same time, replace the dodgy old-school friction stem shifters with lovely, wonderful, smooth, no-hassle bar-end shifters. I have bar-end shifters on my Trek 520 touring bike, and love them.

My question is this....

I've done online searches for ten-speed bar-end shifters, and the best ones seem to be Shimano's Dura-Ace 10-speed bar end shifters SL-BS79 - https://www.bikesomewhere.com/bikesom...4049/30287?g=1

Okay, here's the silly part of my question..... are "ten speed shifters" designed for ten speed bicycles?

The only reason I ask this, is my Trek 520 has 21 gears, and yet it uses Shimano Dura-Ace, bar end NINE speed shifters. Surely, it would use 21-speed shifters, riiiight? The rear cog of my Trek has nine gears, but the whole bike has 21 gears.

So.... should I be looking for five-speed bar end shifters for my little Schwinn ten speed, because its rear cog has five speeds?

Or.... am I missing something? (Go on, humour me!) I'm just a little flummoxed. Any help anybody could offer would be very very greatly appreciated!

Thankyou so much.
In older times, the "speed" of bikes were based on the total number of gear selections; IE # of rear gears X # of front gears. Thus a 10 speed bike could be a 5 rear X 2 front or maybe a 10 rear X 1 front. I guess the "math" is still true today however most just go with the separate numbers rear and front, IE 9X3 instead of calling it a 27 speed.

Shifter "speeds" are based on the number of "gears" its intended to shift (not the total for the bike). IE: A 9 speed rear shifter is for a bike with 9 rear gears (9 speed bike, 18 speed bike, 27 speed bike). BTW, how do you get a 21 speed bike with 9 rear gears? 9 X ? = 21?
Was it originally a 7 speed on the rear IE: 7X3 = 21 but then was upgraded to a 9 speed rear?

For a 10 speed bike, the rear shifter will be a 5 speed shifter (5X2=10)
You would only use a 10 speed rear shifter if you actually had 10 rear gears.
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Old 01-21-10, 11:13 PM
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i definitely don't trust your counting skills for the total number of possible gears on your Trek 520 (i.e., how many chainrings have you got, multiply this number [probably 2 or 3] by the number of "gears" in the rear, and you'll have your number, which is not going to be 21 if you really have a 9-speed cog int he rear).

however, to your real question, yes, you can use the right-hand 10-speed bar-end to shift the 10 speeds of your rear cassette; the left-hand shifter would ostensibly shift your front derailleur, if you had one. so typically you could have a 10 speed, or a 20 speed (2-front x 10-rear), or even a 30 speed (3-front x 10-rear). i run a similar set-up on my wife's commuter bike.
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Old 01-21-10, 11:29 PM
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Find some old Suntour Barcons on Ebay or somewhere for the simplest and cheapest solution. The elegant solution would be Rivendell Silver shifters. Any of the 7,8,9,10 bar end shifters from Shimano will work, but you would have to use the friction mode because the indexing will not work. Don't ask about converting your Schwinn to indexed shifting because you don't want to know. Good luck with your project!
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Old 01-22-10, 01:18 PM
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Originally Posted by tippy View Post
Shifter "speeds" are based on the number of "gears" its intended to shift (not the total for the bike). IE: A 9 speed rear shifter is for a bike with 9 rear gears (9 speed bike, 18 speed bike, 27 speed bike). BTW, how do you get a 21 speed bike with 9 rear gears? 9 X ? = 21?.
Yeah, the 9 X? = 21 confused me too. If the shifters are 7-speed and the cassette 9-speed, the shifters have to be set in the friction mode to work.

For a 5 cog freewheel there are no current indexing shifters that will work. However, you could use any "speed" and any make or model barend shifters with it since they all have a friction setting.
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Old 01-22-10, 02:33 PM
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For your upgrade in addition to the education on the shifters you'll also need to look at "cold setting", otherwise known as bending, the frame to accept the modern road wheel axle spacing.

There's no better a write up on the why you need it and doing this than at Sheldon Brown's website;
https://www.sheldonbrown.com/frame-spacing.html

And by all means if you want to achieve a simpler look overall with this project there's nothing wrong with considering reducing the crankset to one ring and just run a 9 or 10 speed cluster at the rear. For an upright cruising/pleasure bike 9 or 10 is all you'll really need. To get the most range out of such a setup I'd suggest the wider ratio mountain bike cassete and long cage mountain bike derrailleur. And yes you will need to change the derraileur if you want to have indexed shifting. The old friction shift derraileur isn't designed to move the correct amount in connection with the indexing on the new shifter. At least I'm assuming that you want to modernize up to indexed shifting.
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Old 01-22-10, 05:56 PM
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Originally Posted by HillRider View Post
... you could use any "speed" and any make or model barend shifters with it since they all have a friction setting.
The latest Shimano 10-speed bar-end shifters SL-BS79 do *not* have a friction mode (although many websites say they do) https://www.bikeforums.net/bicycle-mechanics/548931-shimano-dura-ace-bs79-bar-end-shifters-no-friction-index.html
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Old 01-22-10, 07:35 PM
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Originally Posted by Gonzo Bob View Post
The latest Shimano 10-speed bar-end shifters SL-BS79 do *not* have a friction mode (although many websites say they do) https://www.bikeforums.net/showthread.php?t=548931
Thanks for the update. Shimano's own web site doesn't really say but implies they are index only. If so, they are the only ones so any other make or model does offer a friction option.
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