What is the difference between the A911 and A921?
Great question. It is best to go to the product section of the website and study carefully. Basically I offer the following generalities: 1. A911 @ $2500 (and soon to go to $4000) vs. the A921 @ $1300 (similarly equipped) 2. A921 can go as low as $1000 with alloy extensions, levers, arm rests and be upgraded later. 3. A911 @ 555 grams vs. A921 @ 784 grams 4. The A911 is made at a Formula 1 sub-contractor in the U.K. from carbon fiber weaves only available to Department of Defense and F1 and therefore very sexy. The A921 is made in Taiwan from less exotic materials. 5. The A911 has an 80mm drop while the A921 is basically flat. 6. A911 is custom since the extensions are bonded and the arm rests drilled and fixed. Note: the lack of a clamp system also accounts for the lower weight. The A911 is therefore limited to 1260 incremental fit adjustments (including stem lengths and angles) while the A921 has 241,920 fit adjustments. So you can play with your fit and change extensions, arm rests,
