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[wildwood]

Just found another equation for gearing that came out of Crawl mag

Might be useful for those going up a size or 2 and who know their current ratios...........

Works like this and I'll use my own rig as example
I am going to a spit near 40" from a spit near 35" with current 4.56 ratio

40 divided by  35 x  current ratio =

So 40 div by 35 = 1.142 x 4.56 =5.21

So picking nearest 'deeper gearing' means 5.38s thank you

Seems to work with other ration equations that are more complex..... hope it is of use

[Bulldog67]

I have bookmarked it for a day when i get that far 

[scrw]

hey that works
stock WG, 29" & 3.55 to 32" and 3.91

[JamesH]

Seems good, and I like the advice about going to next deepest - makes up for the added weight as well as increased diameter (to some extent).

[Nosebolt]

or you could use the Birtys Gearing Guide or the Tyre and Gear Calculator 

[scrw]

But its wrong, certainly for my WG

[Nosebolt]

But its wrong, certainly for my WG

are you sure,

the calc says 29" & 3.55 to 32" gives 3.917

and the chart says for 32s between  3.73 for economy to 4.56 for power or 3.91, 4.11 or 4.27 for something in between