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Looking to upgrade thumb shifter's on 21 speed mtb!!

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Looking to upgrade thumb shifter's on 21 speed mtb!!

Old 03-21-14, 07:25 PM
  #1  
LeMansGTi
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Looking to upgrade thumb shifter's on 21 speed mtb!!

So, I have a 21 speed mtb and the plastic red interior gear piece broke.
Just like in this pic.


It is a sram trx shifter, here is a picture.


So, I was looking for something that pretty much would be a straight bolt on without really having to upgrade anything else.

I have a shimano Tourney TX rear derailleur. Which I actually replaced last year.



Yes, I do not have high end parts, but the bike has held up rather well with the "abuse" I have put it through. haha

Thank you!!
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Old 03-21-14, 07:33 PM
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They would be high end but well worth it in my opinion, Shimano XTR. I installed them on my 21 speed with Jag Wire Pro cables, so smooth, so quick and precise.

I screwed up, I was 27 speed. 9 speed cassette.

Last edited by 02Giant; 03-21-14 at 07:37 PM.
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Old 03-21-14, 07:45 PM
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Originally Posted by 02Giant View Post
They would be high end but well worth it in my opinion, Shimano XTR. I installed them on my 21 speed with Jag Wire Pro cables, so smooth, so quick and precise.

I screwed up, I was 27 speed. 9 speed cassette.
Thank you but a lot more then what I am willing to spend.
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Old 03-21-14, 10:01 PM
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A set of Shimano SL-M310 shifters would work and you can find 'em new for around $25-30 online.
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Old 03-22-14, 06:25 AM
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Shimano EF-51 or EF-65 shifters/levers. The levers will work with either V-brakes or Cantis, but must be set before you install. It looks like you only need shifters, and there is probably an equivalent without levers.
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Old 03-22-14, 06:46 AM
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Tourney trigger shifters, set costs $15 shipped on Amazon, complete with cables and housings. Its all I use on vintage MTBs, including my own.

Simple, reliable, friction front (which I prefer), indexed rear.


Amazon.com: Shimano Shifters SL-TX30 Tourney 3x7 Pair: Sports & Outdoors
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Old 03-22-14, 08:01 AM
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i recommend shimano shifters as a replacement

in my experience
sram has built their empire on making the cheapest possible entry level products
using plastics that almost always break if the parts are regularly used

higher quality sram stuff is probably better
but i have never tried it
because i formed my negative opinion of them when they only made gripshifts
and they continue to make products that reinforce my prejudice
and
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Old 03-22-14, 09:31 AM
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Originally Posted by wrk101 View Post
Tourney trigger shifters, set costs $15 shipped on Amazon, complete with cables and housings. Its all I use on vintage MTBs, including my own.

Simple, reliable, friction front (which I prefer), indexed rear.


Amazon.com: Shimano Shifters SL-TX30 Tourney 3x7 Pair: Sports & Outdoors
What do you mean by "friction" front exactly?

Thank you
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Old 03-22-14, 09:33 AM
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Originally Posted by Wilfred Laurier View Post
i recommend shimano shifters as a replacement

in my experience
sram has built their empire on making the cheapest possible entry level products
using plastics that almost always break if the parts are regularly used

higher quality sram stuff is probably better
but i have never tried it
because i formed my negative opinion of them when they only made gripshifts
and they continue to make products that reinforce my prejudice
and
Would any shimano shifter set work as long as its a 3 and 7 speed?

Do the shimannos have a metal gear inside or plastic as the sram?
I would assume regardless of brand, all lower end models and even middle priced models would have plastic inside the housing, no?

thank you
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Old 03-22-14, 09:40 AM
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7 speeds. non indexed thumb shifters work fine , I have 2 set up tat way

+ another with the lever on the bar ends.

no plastic detents to fail ..
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Old 03-22-14, 09:50 AM
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Originally Posted by LeMansGTi View Post
Would any shimano shifter set work as long as its a 3 and 7 speed?

Do the shimannos have a metal gear inside or plastic as the sram?
I would assume regardless of brand, all lower end models and even middle priced models would have plastic inside the housing, no?

thank you
Kind of a moot point, since you don't want to spend much.
A non indexed FRONT shifter can actually be an advantage, since you can "TRIM" the adjustment better to prevent chain rub in the gear combinations you aren't supposed to use.
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Old 03-22-14, 08:20 PM
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@LeMansGTi, there are two kinds of shifting: friction and indexed. Indexed is more modern & some people call it "click shifting" where the chain moves 1 cog with each "click". Prior to indexed shifting there was friction shifting where you do not feel or hear "clicks". You push/pull the shifter lever and the cable tightens or loosens and the derailleur moves the chain however much you push/pull. Sort of like the difference between a manual and an automatic transmission in a car. Hope this answers your question about the front shifter being friction.
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Old 03-23-14, 12:37 AM
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never_recover
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Wow thanks for the pointer, these look great, didn't know them...

They look like they would have similar ergonomics as my Paul thumbies + Dura-Ace bar-ends...

Much much better than the usual trigger shifters because the triggers are *above* the bar so you don't bang your knees climbing out of the saddle...

If only they would do a 10 speed road version...

Oh and I agree that the value of low-end Shimano parts is ridiculous, this is one of the main reasons I'm a long-time Shimano fan (you can buy *any* Shimano part and know it won't be complete junk)...

Originally Posted by wrk101 View Post
Tourney trigger shifters, set costs $15 shipped on Amazon, complete with cables and housings. Its all I use on vintage MTBs, including my own.

Simple, reliable, friction front (which I prefer), indexed rear.


Amazon.com: Shimano Shifters SL-TX30 Tourney 3x7 Pair: Sports & Outdoors
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Old 03-23-14, 12:45 AM
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Apparently there is a TX-50 version which looks great...

Shimano Tourney TX50 Thumb Shifter Plus - Pair - 7-Speed | Evans Cycles



Much better (for me) than the usual triggers:

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