SunRace Sturmey-Archer has released the new A2 two-speed rear hub, featuring automatic shifting and four braking options.
The A2 doesn’t require a shifter on the bar, meaning it should make for a low-maintenance solution for those seeking simple and efficient shifting on their commuter bikes.
A new kids’ version of the hub has also been released, so young riders can concentrate on pedalling rather than shifting gears.
Sturmey-Archer is well known for its internal gear hubs, creating its first in 1902 and being bought by SunRace in 2000.
Many riders choose internal gear hubs because they generally require less maintenance compared to derailleur setups, due to the mechanism being protected from the elements.
Sturmey-Archer says the A2 has a gear ratio of 138 per cent and changes gear based on the RPM of the rear wheel.
For a 28in wheel, the hub will shift into the low gear at approximately 14.6km/h and shift into the high gear at 19.4km/h.
There are four braking options available for the A2 hub, with rim, disc, coast and drum brakes all supported, making it compatible with a wide range of bikes.
SunRace Sturmey-Archer has yet to confirm pricing, but we can expect to see the hubs roll out as OEM parts on commuter bikes soon.
