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I first bought these shifters to put on a 20-year-old Bike Friday that has an old Shimano road rear derailleur and a six-speed freewheel on a 3-speed Rohloff rear hub (equivalent of a triple crank and a six speed cassette). I recently bought another set to replace 12-year-old SRAM Apex integrated shifters on a Novarra Veritas lightweight touring bike with a double-ring crankset and a 10-speed rear cassette. Here's my report out given the combined experience on both bikes:
1. The left shifter definitely works with the three speed hub and so, presumably, would work fine with a triple crank.
2. The right shifter works with both the six-speed freewheel and the SRAM 10-speed cassette. It can shift cleanly to all 10 cogs.
3. It takes some effort to shift the SRAM front derailleur with these shifters, but it also took more effort with the original SRAM integrated shifters so no complaints there.
4. The black plastic bushings on the retaining nut side of the Dia-Compe assemblies have held up OK but I wish they were made of metal. Be careful when installing, they have a raised tenon that engages the rectangular hole in the shifter and that tenon is pretty fragile, you can crush the corners if you aren't careful to fit it exactly into the rectangular hole during assembly.
5. Having done multi hour rides with these, I notice that after a while the retaining nuts loosen. Having grown up in the era of the original friction shifters (I had both Suntour and Campi) I recall that this is why the retaining nuts have the triangular pivoting grip rather than a slotted, hex, or phillips head that requires a tool...you can tighten while riding. Still, it's a bit inconvenient to have to tighten while riding--my old Suntour downtube shifters, which I still miss, never had to be tightened during a ride so this is a minus on the Dia Compes.
If the bushings were more durable and the shifters didn't require tightening at fairly frequent intervals, I would give these a five. I see other posts talking about threadlocker so the loosening issue isn't just me, but I rode those Suntours forty years ago and they didn't have this problem, so it's fair to expect a better solution from Dia Compe. For the price I think it's fair to expect that and the bushing to have been better addressed by the manufacturer. For comparison, a set of these plus Tektro brake levers is only $60 less than a set of brand-new SRAM 10-speed integrated shifter.
In summary, they get a four of five for their durability (they're bomb-proof except for that plastic bushing), ease of installation, ease of maintenance, and the fact that they'll likely work with any cogset from 10 speed back through the freewheel era. They get a point off for the cheap bushing and their loosening habit.
Fitted up right away, easy to install and work on. Shifts great. May need some blue threadlocker on threads to retain shifting pressure on bumpier roads/lots of shifting
Dia-Compe ENE Bar-End Shifters
Replaced my 10+ year old Shimano shifters on my a hybrid/fitness bike. They work fantastic and without issues mated to a Shimano deorde derailleur set 3x8. I ran the cabling internally in the handlebars and drilled out holes away from the handlebar grips.
When index shifting was developed long ago, ordinary shifters such as these became known as friction shifters, yet ordinary shifters are still welcome because they allow a rider's fingertips to intimately feel a derailleur and its chain shift through gears and sprockets, making a bicycle and its rider that much closer as a team. And while down tube shifters are more direct and sensitive, bar-end shifters are more casual and relaxed and they both are worthwhile cycling experiences.