To keep up with the SO’s race bike riding and on her special request, I needed something to ride fast as well.
With somewhat uncomfortable iliosacral joint issues that many bikers around my age have, and with the issue of having to move the shifters and levers to the left side on the handlebar, the BMC Alpenchallenge with its conventional sitting position and a horizontal handle bar seemed like the obvious choice rather than a race or road bike setup. The shop sales person the advised me to get the Shimano SORA version, thus making my choice a BMC Alpenchallenge AC01 SORA, not the belt variation, which was definitely the right choice.
With a 50/11 gear ratio for the Shimano SORA (this bike comes with a 3550 50/34 chainwheels and a HG50 11-32 cassette) and a 50/19 as maximal gear ratio for the belt drive, the conventional and not very expensive SORA transmission clearly wins the speed question.
Now, BMC introduced the Alpenchallenger line specifically for road bicycle riders that wanted the conventional “Herrenvelo” format, and definitely a real bicycle (not some motorized gadget), and that wanted to ride that just as fast as we rode our good old Swiss Allegro “Herrenvelos” back in the days: fast as hell. In other words, the Alpenchallenger was introduced as a commuter bike that can serve to chase e-bikes.