3x1 RoadUno.
Took awhile to work out the drive bugs.
I learned you can't use sealed-bearing, high-engagement BMX freewheels with the 3x1 drivetrain - the rigid freewheels hopped the chain whenever I needed mash.
Final solution here was Shimano MX-30 freewheels, with loose roller bearings, and enough angular freeplay to adjust to the variable chainline.
I replaced my IRD Alpina triple FD with an older Shimano 600 TriColor FD, which I have older 6200 (Arabesque) and 6207 versions working fine on two other half-step triple drivetrains.
I was getting about one over-shift off the outside chainring on each ride - the Alpina triple FD worked perfectly 90% of the time, but the other 10%, it would cock a chain link and drive it off the chainring.
'92 Shimano 600 (Ultegra) FD6401 had all the travel I need, perfect penny clearance between cage and large chainring teeth, can't physically overshift, and the chain doesn't rub the cage at the two extreme shifts.
Unfortunately, the good-looking used FD had probably been on a bike and on a large chainring for its 30 years.
After 3 weeks of demanding more from it, the return spring relaxed (spring creep) so it would no longer shift to my granny ring - I could push it over by hand, but the spring was sprung in that final travel.
I made do with a Campy Racing T, improvement over Alpina, though still fighting overshift, while a NOS Ultegra FD6401 made the trek from France. Shipping was delayed, because the bike collector was a foodball fan and was on this side of the pond until FIFA ended.
Along the way, changed flip-flop freewheels and large chainring as follows -
- the logic was larger rear cog for trails and greenways (max 15 mph), and smaller rear for road groups.
The 44T big was not quite fast enough on the road, and the 45" granny was taxing on switchbacks.
It will now pace 18 mph,
All humming now like there were never any troubles, and I'm making 60 mi/wk through S. Texas summer, which is a good target that will stretch out in the fall.