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The massive head tube area yields expected dividends in front triangle rigidity for sharp handling(Image credit: James Huang)
The Isaac Sonic offers off-the-charts frame rigidity that should satisfy the most discerning riders(Image credit: James Huang)
The egg-shaped head tube profile adds to the stiffness without adding much weight.(Image credit: James Huang)
We're accustomed to seeing bulbous bottom bracket shells but this one is simply huge.(Image credit: James Huang)
The top tube flows smoothly into the full-length dual seat stays.(Image credit: James Huang)
The giant front end is matched with a similarly proportioned rear triangle.(Image credit: James Huang)
All of this material requires a few extra grams but it's a worthwhile tradeoff in this case(Image credit: James Huang)
In keeping with its 'natural design' motif, the frame is virtually devoid of any sharp creases.(Image credit: James Huang)
Isaac says the frame is made of ultra high modulus tubing and in this case we believe them(Image credit: James Huang)
The dropouts are arguably a bit clunky in appearance but they get the job done.(Image credit: James Huang)
The seat tube is capped by a rather sizeable collar.(Image credit: James Huang)
The matching carbon fork uses a tapered-and-oversized 1 1/8"-to-1 1/4" steerer(Image credit: James Huang)
The Campagnolo Record Ergopower levers provided their usual excellent performance.(Image credit: James Huang)
The same can be said for the Record rear derailleur(Image credit: James Huang)
The carbon cage on the Record front derailleur matches the look of the frame well.(Image credit: James Huang)
Campagnolo was late with external-bearing bottom brackets but its Ultra-Torque design was worth it(Image credit: James Huang)
The dual-pivot front/single-pivot rear brake calliper combination gave excellent brake modulation(Image credit: James Huang)
The front rim on the Campagnolo Neutron Ultra wheel uses a symmetric spoke drilling…(Image credit: James Huang)
…while the rear is slightly offset for more even spoke tension.(Image credit: James Huang)
Both rims are milled in between the spoke holes to shave a few grams.(Image credit: James Huang)
There's more carbon to be found in the front hub shell…(Image credit: James Huang)
…as well as the rear. (Image credit: James Huang)
The included Veloflex 'open tubular' clinchers provided a stellar ride.(Image credit: James Huang)
The Deda Newton 31.8 cockpit is a well-proven design.(Image credit: James Huang)
The Selle Italia SLR Gel Flow saddle is comfortable but the Isaac seatpost was disappointing(Image credit: James Huang)
Isaac is a German company both in origin and philosophy:
The Isaac Sonic impresses you right out of the box with
