pic: 18 Tooth #25 Sprockets Inside VersaChassis

[rees2001]

Nice looking model.

We have been putting 16T #25 chain inside 2 x 1.5 tube for a couple of years. If you want to do a drop center 16T is as small as you can really go. Your chain will start to stretch and loosen up, rub a bit against the wall of the tube. Assembly of 18T will be almost impossible and if you are just running a 1:1 ratio between wheels why go with an 18T?

I really believe Versa is going to really change things for teams with limited fabrication abilities.

[sdcantrell56]

Originally Posted by rees2001

Nice looking model.

We have been putting 16T #25 chain inside 2 x 1.5 tube for a couple of years. If you want to do a drop center 16T is as small as you can really go. Your chain will start to stretch and loosen up, rub a bit against the wall of the tube. Assembly of 18T will be almost impossible and if you are just running a 1:1 ratio between wheels why go with an 18T?

I really believe Versa is going to really change things for teams with limited fabrication abilities.

The main reason for going with a higher tooth count sprocket is to reduce the load in the chain and increase # of teeth that are meshed. Both influence how robust the system will be.

[ajlapp]

Two strands of #25 fit side-by-side inside a standard "1x2"x.125" wall tube.

We use 17 tooth double sprockets inside of our SimpleTube Chassis.

You cannot have any drop in this setup because of clearance around the chain.

Otherwise the system is great and is a nice volume save. FRC118 used this same setup for 2013 with zero failures and maintenance issues.

[Mike Schreiber]

Originally Posted by ajlapp

Two strands of #25 fit side-by-side inside a standard "1x2"x.125" wall tube.

We use 17 tooth double sprockets inside of our SimpleTube Chassis.

You cannot have any drop in this setup because of clearance around the chain.

Otherwise the system is great and is a nice volume save. FRC118 used this same setup for 2013 with zero failures and maintenance issues.

How do you get away without any drop? No problems turning?

[Akash Rastogi]

Originally Posted by Mike Schreiber

How do you get away without any drop? No problems turning?

They had different diameter wheels. Pretty cool stuff!