tyre size-gearing

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fred
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Wed Oct 14, 2009 6:16 pm

i'm thinking of putting a 100/90 tyre on wide rims,anybody any idea how much,if at all it lowers gearing compared to a 3.50?
thanks,fred

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chris2470
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Wed Oct 14, 2009 7:04 pm

In real terms zero, use this handy tools as a guide.
http://www.tonycassidy.com/microsite/Ge ... liser.html
Best Regards

Chris

fred
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Wed Oct 14, 2009 7:38 pm

cant view it.

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chris2470
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Wed Oct 14, 2009 7:42 pm

You will find it in the tuning & maintenance section :

http://scooterotica.org/tempforum/viewt ... f=5&t=1852
Best Regards

Chris

fred
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Wed Oct 14, 2009 7:58 pm

sorry,should've put unable to view it. I haven't got excel,or whatever i need to download it.
Just handy to know,if tyre size makes a difference,as i use rev counter as speedo.

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chris2470
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Wed Oct 14, 2009 8:05 pm

Ok Fred sure.
Basically no real world difference at all.
Best Regards

Chris

joespeed
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Wed Oct 14, 2009 8:08 pm

yes it will make a difference to the gearing,just fitted one on a ts and had to come down one tooth on the front sprocket to enable it to pull top gear ,sorry cant give the engine spec,
and you do not state what you are putting it on!
regards
joe

fred
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Wed Oct 14, 2009 8:38 pm

it's a ported cast barrel 200. pulls well with li 150-17/48.torquey not revvy

joespeed
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Wed Oct 14, 2009 9:33 pm

i sugguest you fit it and try it,being a gutsy thing you could be ok,
regards
joe

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corrado
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Wed Oct 14, 2009 11:17 pm

Overall diameter of a 100/90 is 444mm a 3.50 is 448mm. In theory the 100/90 should technically lower the gearing.

*Based on tech sheets from Sava.

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