Adding a 3 ring front to the 4-speed rear was the next logical step for the browning transmission.

The SmartShift-1200 truly takes automatic bicycle shifting to the next plateau. 30, 38, 48 is the gearing that was picked as the most suitable match to our 4-speed rear. By choosing this gear combination Browning has made a true 12-speed transmission with no repetitive gears.

That's right there are no two gears on our bikes that are alike. This is just one of the features that make the Browning transmission easy and unique.

12-speed gear inch range

Gear #	Front Sprocket	Rear Sprocket	Gear Inch
1	30	32	24
2	38	32	31
3	30	23	34
4	48	32	39
5	38	23	43
6	30	17	46
7	48	23	54
8	38	17	58
9	30	12	65
10	48	17	73
11	38	12	82
12	48	12	104