Can a 1x.
Bike touring gear inches.
You don t want to miss anything.
Gear inch comparisons across drivetrains.
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.
On 700c x 38mm tires this gives you a low end of 19 8 gear inches and a top end of 119 8.
The higher the gear inch number the farther your bike can travel on one revolution of the crank.
Values for gear inches typically range from 18 very low gearing via 70 medium gearing to 125 very high gearing.
So we get 26 3 gear inches.
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.
Colors group similar values.
Gear inches understanding your gear ratios.
I do my calculations with sheldon brown s gear calculator.
It has disc brakes an aluminum fork and yes a triple.
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.
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.
The higher the gear inches then the harder it will be to pedal.
The sturmey archer brompton bwr takes two sprockets but other models are included in the list for the benefit of tinkerers see discussion.
What are gear inches.
80 is green 50ish 80 blue and below 50 red.
That isn t quite right since the 700cx42 tires are more like 28 in diameter.
Gear inches is one of several relative measures of bicycle gearing.
That is a whopping 133 of the goal.
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.
26 x 44 16 giving us 71 5 gear inches.
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.
We ve also been in that situation and yes we made the mistake of buying too many things.
It s basically derived from a formula and provides an indication of the mechanical advantage of different gears.
The lowest that bike will go is 25 3 gear inches.
The trek 520 updated for 2019 is about as modern as a classic touring bike can get.
On a touring bike 18 is a great low gear and 113 is a good high gear.
There are many great resources out there explaining every piece of gear that is useful when traveling on your bicycle but not so many.
Given that touring triple cranksets 48 36 24.
A mix of shimano alivio and sora the 520 has 48 36 26t chainrings mated to an 11 36t cassette.
