#### highwayman

##### New Member

ITS JUST COMMERN SENSE TO HAVE ONE

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- Thread starter highwayman
- Start date

ITS JUST COMMERN SENSE TO HAVE ONE

Stick a set of 15's on the back and you'll be able to raise your gearing so your Commer screams at 55 rather than 50!

Is that right? have I got it wrong? but surely if you put bigger wheels on the back it will be screaming at 45?

Just thinking back to when I was sweeeeet 16 amd had a 50cc bike,,,we used to put a bigger sprocket at the front and a smaller one at the back to get 50 out of a 30mph restricted bike!

or am I now elderly and confused[?]

''COMMER'EnSayThat''

I've got a Highwayman!!!

Is that right? have I got it wrong? but surely if you put bigger wheels on the back it will be screaming at 45?

Just thinking back to when I was sweeeeet 16 amd had a 50cc bike,,,we used to put a bigger sprocket at the front and a smaller one at the back to get 50 out of a 30mph restricted bike!

or am I now elderly and confused

When you changed to a smaller sprocket on your rear wheel, you were changing the gear ratio, not the size of your wheel. With a big sprocket at the front and small at the back, for every rotation of the front sprocket you would get more rotations of the rear sprocket. Increasing the size of your rear wheels without changing the gear ratios has a similar effect in that for every rotation of the larger wheel, the further it travels relative to a smaller wheel. If you turn the larger wheel at the same speed as the smaller wheel, that further distance travelled equals greater speed on the road.

Does that help with the confusion? Sorry, I can't do anything about the elderly bit! [}]

'I'm the same age as a Forward Control Commer'