Gear combinations not to go in?

[sreten]

Hi,

Gear inches is simply the gearing of a ordinary (penny farthing) bicycle, in
terms of the size of the equivalent front wheel, for a geared safety cycle.

My bike is faster than yours ...... (ludicrous contraptions taken very seriously at the
time,and has to be said only by the very moneyed classes, a rich persons pastime,
very well illustrated by the choice of the backdrop, this person is moneyed.)

And of course advancement is times pi, not divided by pi, for any wheel diameter.

The Brits of course stuck with g.i.'s, meanwhile the French went for metres advancement.

Stiil I like a simple 20" unicycle is clearly 20 gear inches, a 35/14 BMX 50 gear inches.

rgds, sreten.

This is what 64 gear inches looks like on an ordinary (you need very long legs) :

My 20" folder does 30-60 gear inches, my road bike 40-100 gear inches.

 

[TeeQue]

I have no idea if I'm doing it "correctly" but on my ten speed triple I generally only use the largest half of the cassette in the small ring, the whole cassette in the middle ring and the smallest half of the cassette in the big ring. It seems to work for me and I rarely have to use the trim function of the shifters.

Anyone know if I'm causing undue wear with this approach?

 

[Road_Runner]

@sreten Wowzer! That's a huge bike! Imagine trying to get on that beast. The saddle must at the height of the head of an adult since 64 inches is ~5 foot 4.

@TeeQue Why do you adjust the trim function? Also from other members is this a good idea? I've read somewhere that when you hear the chain rub against something, it highlights that the chain is severely cross chainring.