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tyre size-gearing
Posted: Wed Oct 14, 2009 6:16 pm
by fred
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
Re: tyre size-gearing
Posted: Wed Oct 14, 2009 7:04 pm
by chris2470
Re: tyre size-gearing
Posted: Wed Oct 14, 2009 7:38 pm
by fred
cant view it.
Re: tyre size-gearing
Posted: Wed Oct 14, 2009 7:42 pm
by chris2470
You will find it in the tuning & maintenance section :
http://scooterotica.org/tempforum/viewt ... f=5&t=1852
Re: tyre size-gearing
Posted: Wed Oct 14, 2009 7:58 pm
by fred
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.
Re: tyre size-gearing
Posted: Wed Oct 14, 2009 8:05 pm
by chris2470
Ok Fred sure.
Basically no real world difference at all.
Re: tyre size-gearing
Posted: Wed Oct 14, 2009 8:08 pm
by joespeed
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
Re: tyre size-gearing
Posted: Wed Oct 14, 2009 8:38 pm
by fred
it's a ported cast barrel 200. pulls well with li 150-17/48.torquey not revvy
Re: tyre size-gearing
Posted: Wed Oct 14, 2009 9:33 pm
by joespeed
i sugguest you fit it and try it,being a gutsy thing you could be ok,
regards
joe
Re: tyre size-gearing
Posted: Wed Oct 14, 2009 11:17 pm
by corrado
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.