Hi all I'm happy to say I finally finished my robot chassis such as it is this weekend. When I make a more square version I'm going to use the suggestions given in my earlier frame post but I figured I'd already hacked up enough aluminum to keep cocola afloat for a year so I may as well use it.

Anyway, I've had a wheel fitment problem from the start, I think I have a solution so I'll post it and would like to know if the solution will work. ( please forgive my mixture of standard and metric references in advance, I don't have as many metric measuring devices as I'd like to)

I have two jazzy 600xl motors. The motors have a 17mm dia keyed shaft (6mmx40mm keyway), the motor shaft is 1-7/8" to the beginning of the thread and 2-3/8" to the end of the thread, thread is M10x1.25

The original wheels are 13" diameter and far too large for my project (I wish I'd have realized that before I bought them). I just need a cheap 10" or so lawn wheel. Most lawn wheels in the states have a bearing bore diameter of either 5/8" (too small) or 3/4" (too large). My first thought was to buy 3/4" bearings and an adapter for a 17mm bore, a guy sells these adapters on eBay for like $12. The problem is that nothing would stop the bearing from spinning and the wheel not moving.

So I kept looking and found these:

17mm hub

A 17mm hub with a 6mm keyed bore.

I figured I could get them to bolt on to these wheels:

They are 10x2.75" wheels with a through hub diameter of 1 7/8" and a bearing hole diameter of 1 3/8"

Do you think I'd still need a bearing or would you just bolt this hub on to the wheel, attach it and go?

The answer is probably staring me in the face but I've been looking for a solution for so long I can't see the forest for the trees anymore. All assistance appreciated.

Matt