Sprocket size for 250mm wheels

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Francis Thompson (Francis40s)
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Username: Francis40s

Post Number: 2
Registered: 1-2009
Posted on Friday, January 23, 2009 - 1:38 pm:    Edit Post    Move Post (Moderator/Admin Only)

Hey, for my UGV project I'm planning on using your 10" pnuematic wheels with knobby off road tyres. Firstly, do these come with offset or non-offset wheels? And as I'm planning on fastening the sprocket to the wheel with spacers made from 22mm diameter rod, what's the smallest sprocket I could use?
Admin (Admin)
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Username: Admin

Post Number: 960
Registered: 10-2004
Posted on Friday, January 23, 2009 - 6:42 pm:    Edit Post    Move Post (Moderator/Admin Only)

Francis,

Our website lists non-offset only. When you say smallest sprocket, do you mean number of teeth or pitch?
Francis Thompson (Francis40s)
Member
Username: Francis40s

Post Number: 3
Registered: 1-2009
Posted on Saturday, January 24, 2009 - 11:12 am:    Edit Post    Move Post (Moderator/Admin Only)

Outer diameter. If it helps, I'd be using 8mm pitch chain.
Admin (Admin)
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Username: Admin

Post Number: 962
Registered: 10-2004
Posted on Monday, January 26, 2009 - 6:53 pm:    Edit Post    Move Post (Moderator/Admin Only)

Francis, the knobby wheels have a 16mm shaft requiremnet so you would need a sprocket with a boss of say >20mm, say 22mm minimum. In 8mm this would be a 16T or larger.