Just purchsed a platypus

[Edward Garnica]

So I'm purchasing all the parts while awaiting shipment. My question:

What is the largest rear cassette/derailleur combo that I can comfortably run with a 1x white industries square taper front crank, 42t, with a single dia-compe ene 11S thumb shifter? I am building the rear wheel with a WI m15 hub shimano hyperglide compatibility. 

[Joe Bernard]

Whatever the biggest cassette/derailer combo Shimano makes is what you'll need. I use a SRAM 1 derailer and SunRace 11-50 11-speed cassette on a WI hub, but I don't think your Dia-Compe friction shifters work with SRAM 1:1 actuation ratio. 

[Joe Bernard]

*SRAM Rival 1

[Edward Garnica]

It says 11 speed compatible on friction. Anyone messed with one of these thumbies before? 

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[Joe Bernard]

It's a bigger-barrel version of Riv Silver, which works well with Shimano geometry. My understanding - others feel free to chime in - is they don't work as well with SRAM 1:1 actuation, it will require more throw than the lever delivers. It will friction-shift Shimano for sure. 

[Edward Garnica]

I figured I think it did say it wasn’t sram friendly. Wondering if the shimano eight speed 11-40 listed on the riv site is my best bet. Would like to go bigger but also want it to be as functional as possible. 

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[Joe Bernard]

Erp, strike that, this review on the Velo-Orange page for the dt shifter says it works with the SRAM Rival 1 I'm using. You're in business!