Lab data: 18.3/20 (0.94mm head tube deflection; 0.58mm BB deflection)
Pedaling response: 12.2/15
The Allegro comes built with 28-millimeter tires, and you’ll need them to take some of the sting out of a surprisingly stiff rear end that’s reminiscent of old loop-tail BMX bikes. In fact, the Allegro is full of surprises: Billed as an endurance bike, it accelerates almost like a racer at high speeds, where it is a capable contender.
Our lab found the head tube to be one of the least stiff we’ve tested, though, which leads to some imprecise steering out of the saddle. That’s not too surprising, given the head tube measures a tall 192 millimeters (size L). Why so tall? It puts the rider in a more comfortable, aggressive-but-more-upright position that’s ideal for all-day rides. This is perhaps where Opus has tried to add an element of comfort to the Allegro, since the bike relies so heavily on the wide tires for rear-end compliance. Comfort is, overall, a mixed bag on this bike, and it’s likely you’ll feel more comfortable on the pavement than on dirt-road chatter.
Still, the Allegro powers off the line better than an endurance bike should be expected to, largely due to a solid, 86.5-millimeter bottom bracket and thru-axles front and rear. You can stay in the mix on the group ride and put in your time at the front for a pull or two, though you probably won’t mix it up too much in town-line sprints.
Shimano RS805 disc brakes add smooth modulation, which is exactly what you need during all-conditions endurance rides. Heavy Alex rims are underwhelming, but they’ll take a beating if you’re spending most of your time on rough roads or gravel.
Component highlights: Shimano Ultegra drivetrain with 50/34 crankset and 11-28 cassette; Shimano RS805 flat-mount hydraulic disc brakes; Alex CXD4 wheels
Weight: 17.99 pounds (size L)