TLaurent 

I have a couple tandems and find it difficult to find a willing stoker because most riders prefer to pedal at their own pace. I don’t mind doing most of the work and have been searching for a solution to enable the stoker to coast while the the captain can continue pedaling. I even bought a set of foot rests to install for the stoker but finding a location to install them w/o obstructing the captain’s heals has been a challenge. I recently discovered the Shimano FFS and think that this might be the solution that I’m looking for. One bike is a 70s Gitane tandem with an odd shaped BB so it’s not a good candidate. The other is a Yakota Grizzley that’s likely ISO so the odds of finding an FFS to fit are better. Has anyone used this system?

roytar

I'm in the process of converting my wife's FFS based Schwinn world tourist to single speed coaster brakes. If you find out the world tourist FFS is compatible with your needs, I'll gladly send it to you.

TLaurent 

Thank you for offering! I have an adapter for Schwinn bottom brackets and would like to try. Please let me know what you would like for the FFS. I’m located in Saint Paul, MN. -Trent

roytar

I pulled the cranks off but need the old style tool to remove the bottom bracket caps. Ordered it online should come in a couple of days. I want to make sure a standard BB will fit.
So it may be a few days....

TLaurent 

Sounds good. Some of those older BBs are difficult to remove. Good thing the BF has many knowledgeable members.

roytar

Are you still interested? I finally completed the FFS to coaster brake conversion.
You can have the FFS for the cost of shipping.
I couldn't separate the chainrings from the BB axle. Some photos:

roytar

Are you still interested? I finally completed the FFS to coaster brake conversion.
You can have the FFS for the cost of shipping.
I couldn't separate the chainrings from the BB axle. Some photos:

plumberroy

Ross bikes used these too . I actually think it's a good system for an around town bike. You can shift to a lower gear coasting up to a stop

Leisesturm

I don't know ... IPS has been a thing much more recently than FFS systems which (tmk) have never been offered on the Schwinn tandems of the day. I would like to see the 'math' of obtaining IPS this way vs something like a DaVinci or Santana system. To me, it's problematic that the rings cannot be removed because a standard 'crossover' system is not going to be possible (afaics). Two rings of the same size are going to be necessary on the drivetrain side of the bike. And the captains crank will need to match those sizes.

TLaurent 

@roytar DM sent. Thank you!