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Those look like a pair of Paul's Thumbies. You can also just buy bar end shifters and attach them to the bars as well. This will likely be a lot cheaper provided the bar ends fit in the bullhorn you're using.


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The answer is yes. That was a complaint about the setup from many riders that often your would accidentally shift while trying to break. The problem is worse when you are trying to brake while the front end is jumping all over the place. I had a friend with the setup on a Kona Stinky Primo back in the day and I tried it on one shuttle run. I decided it ...


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This does not answer your question, but it's too long for comments. Summary: take it to another bike shop. Details This is an internally geared hub (IGH). I cannot tell what make it is; the ones I know of are Sturmey Archer, Shimano Nexus and Alfine, and SRAM. The whole bike has been left to molder - the chain has rust, and the tires are flat. The chain ...


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You are correct that 2x8 refers to 8 speed cassette or freewheel and a crank with 2 speeds. The one that can be confusing is 18speed which can be an older 3x6 or a more modern 2x9. The other concerns is mountain or road drivetrain and Shimano, Sram or Campagnolo compatible. You can search this site for compatibility questions that may match your specific ...


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A friction shifter allows you to continuously move the derailleur. The point of this on a front shifter (the left) is to trim the front derailleur. Trimming the front derailleur is when you tweak the position of the front derailleur to account for the change in chain angle with shifting, e.g. eliminate the chain rubbing on the cage of the derailleur. There ...


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It sounds like you have a broken or worn shifter. Grip shifters have small plastic teeth inside them. The teeth loosely mesh so that it will move when twisted but tight enough to maintain the selected gear. These shifters are still common and relatively inexpensive generally around $10 US.


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The Alvio M4000 is a 9 speed shifter, as long as your XT derailleur is a 9 speed version it will be fine


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It will totally work. I broke my cassette on one of my bikes, then I replaced it with Shimano Megarange 18-34T. My command is 8 speed and the cassette is 7. As I adjusted the tension of the wire it still runs quite nice. Gear 7 and 8 on the command are representing 7 on the cassette. SO YES IT DOES WORK.



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