• I was offered some 10s DA levers for a tenner or something on here recently! PM for secret details...

  • I believe DA levers don't pull enough cable to work with SRAM 10-speed derailleurs. You'd have to bodge something together (assuming you want a wide-range cassette) with either a Shimano MTB derailleur or a 10-speed road derailleur with a long cage - I don't think they exist.

    It would work in friction mode with an MTB derailleur I expect though.

    Now here’s where things get tricky, as more gears are added and everything gets closer together, tolerances get tighter. This means that with a little bit of dirt in the cable system, the derailleur doesn’t quite move as far as it should, and all of a sudden you’re in the wrong gear and your bike is ghost shifting like crazy. Enter Shimano Dyna-Sys. In the simplest terms, Dyna-Sys increased the amount of cable pulled and decreased the amount of derailleur movement per millimeter of cable pull. Because Shimano 10-speed road is the same 1.7 ratio as before, lets compare the 10-speed Shimano road to the 10-Speed Shimano Dyna-Sys mountain. The cassettes are the same width, with a cog pitch of 3.95mm. But the difference is that 10-speed road pulls 2.3mm of cable, compared to the 3.4mm of cable that Dyna-Sys pulls. So in order to end up in the same gear after a shift, the derailleur ratio is reduced from 1.7 to the new Dyna-Sys 1.2 ratio. The main reasoning behind this design change is that with more cable pull, a turn of the barrel adjuster gives much more incremental fine-tuning. Dyna-Sys allowed Shimano to squeeze 10-speeds into the same freehub body and still maintain quality shifting that stays in-tune. While I can’t speak for the engineers, I would say that Dyna-Sys was considered not necessary on road systems, because they weren’t being beaten around quite like a mountain system, until 11-speed road was introduced. Now the Shimano 11-speed road systems have a type of modified Dyna-sys that keeps them in-tune with tighter cog spacing but is completely incompatible with 10-speed road or mountain.

    From here

    Edit: it might work with a 9-speed MTB derailleur, 10-speed DA shifter and 10-speed cassette. But then you have to go all the way back to 9-speed and I don't know if you get the nice features like clutch mechs. Really Shimano have totally fucked it when it comes to 1x drivetrains, wide-range cassettes, anything gravel-related. They seem to think (until now) that everyone should be happy with 11-28 cassettes and reducing the size of your chainrings until you get a low enough gear. No you dicks, I want 34/42 and 50/11 on the same bike.

  • If you wanna use Shimano bar end shifters with Shimano mountain bike rear mech, you would need something like Wolftooth TanPan or Jtek which is slightly cheaper.
    Microshift make an MTN version of bar end shifters already indexed for MTB rear mechs, so no Tanpan or Jtek needed.

  • 9-speed MTB derailleur, 10-speed DA shifter and 10-speed cassette

    This is what I run on my commuter, works great but no option of clutch mechs.

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