Riding the gdmbr and even on the northern stretch of the natchez trace parkway i got down to 3 5mph on steeper climbs using 17 1 gear inches.
Bike touring gear inches.
The lowest that bike will go is 25 3 gear inches.
It s basically derived from a formula and provides an indication of the mechanical advantage of different gears.
As in a car low gearing is for going up hills and high gearing is for going fast.
What are gear inches.
When you are using one of your front chainrings and shift to one of your rear cogs you are changing the gear inches of your rear wheel.
80 is green 50ish 80 blue and below 50 red.
There are many great resources out there explaining every piece of gear that is useful when traveling on your bicycle but not so many.
We ve also been in that situation and yes we made the mistake of buying too many things.
The higher the gear inch number the farther your bike can travel on one revolution of the crank.
On 700c x 38mm tires this gives you a low end of 19 8 gear inches and a top end of 119 8.
The sram sachs 3 x 7 3 x 8 3 x 9 3 x 10 and the sturmey archer cs rf3 and cs rk3 are the only recent current production internal gear hubs designed to use rear sprocket clusters.
You don t want to miss anything.
Can a 1x.
Gear inches understanding your gear ratios.
Gear inch comparisons across drivetrains.
Too high tech for you.
The trek 520 updated for 2019 is about as modern as a classic touring bike can get.
The sturmey archer brompton bwr takes two sprockets but other models are included in the list for the benefit of tinkerers see discussion.
The higher the gear inches then the harder it will be to pedal.
When planning your first tour on a bicycle it is very easy to go crazy about buying all sorts of bike touring gear for it.
A mix of shimano alivio and sora the 520 has 48 36 26t chainrings mated to an 11 36t cassette.
26 x 44 16 giving us 71 5 gear inches.
So if for example our straight gear ratio is 44 16 and the rear wheel has a standard overall diameter of 26 then the calculation would be.
Here is the most technical aspect i am going hit you with about touring bicycle gearing.
Values for gear inches typically range from 18 very low gearing via 70 medium gearing to 125 very high gearing.
Gear inches is gear ratio times the diameter of the rear wheel.
Gear inches is one of several relative measures of bicycle gearing.
It has disc brakes an aluminum fork and yes a triple.
On a touring bike 18 is a great low gear and 113 is a good high gear.
Given that touring triple cranksets 48 36 24.
The touring bike gearing has a greater range than that of a road set up as it includes a much lower set of gears to cope with the variety of terrain on a tour.
I do my calculations with sheldon brown s gear calculator.
That isn t quite right since the 700cx42 tires are more like 28 in diameter.
