5" wheels

[kevin.li.rit]

Try skyway wheels. (Remember them?) They used to be in the KoP and they sell a 5inch wheel.


http://www.skywaywheels.com/products_004.htm

[Dan.Tyler]

Unlike many here...

I highly recommend banebots wheels for drivetrains.

They come in 4 7/8 diameters. They have crazy high traction. They do wear more quickly because of this though, so it is usually wise to get a spare set of you go this route. Get some blue wheels for testing, orange or blue for competition.

[waialua359]

Originally Posted by kevin.li.rit

Try skyway wheels. (Remember them?) They used to be in the KoP and they sell a 5inch wheel.


http://www.skywaywheels.com/products_004.htm

Ahh, the infamous Skyway wheels.
Great find!

[Lil' Lavery]

If you do opt to go with Banebots wheels for the drive, I'd suggest going with one set of 3.875" wheels to be used on one end rather than a 4.875" to be used as the center wheel. You'll still end up with only four wheels in full contact with the carpet under normal conditions (a "pivot" as you called it), thus achieving the shortened wheelbase and improved turning. However, you'll have a much less significant difference in surface speed of the wheels (a larger diameter wheel spinning at the same rate as a smaller diameter wheel will have a faster linear velocity at the edge of the wheel). Especially if you mount the banebots wheels on the lighter end of the robot, so under nominal conditions they won't be contacting the floor (thus your four wheels with identical diamters will be in contact). You want to avoid differening surface speeds when possible, so you can harness the static friction of your treads rather than the lower dynamic friction.

[Jeffy]

Originally Posted by Gregor

Raise one of the outside wheels 1/8". Drill a clearance hole in the current existing holes for your outside wheels, then rivet or bolt a new piece of metal overtop, which the axle hole raised.

I know 610 did this last year, ask them for a few pictures.

Similar to this^

Drill the hold 1/8" higher. Insert "shims" under axle. The shims we have used were steel sheet metal.

[Dad1279]

If you have bolts as axles, (not live axles) you could re-drill the 3/8" holes with 1/2"(offset higher 1/8") and change wheel bearings to 1/2".

Or check a few 4" wheel brands, like the vex or Andymark traction and see if they are slightly bigger or smaller.

[Ikillee]

Thanks for the help everybody. We got it working by using aluminum plates riveted to the chassis as Gregor suggested. It works like a charm now