Geometry
Astra’s geometry is the most Basso of all, derived from the steel models. A platform improved year after year, preserving the racing DNA but making it transversal and able to adapt to those who are not an athlete who ride bikes every day. An evergreen consistent with its past, but capable of perfecting itself from model to model becoming more versatile.
| 45 | 48 | 51 | 53 | 56 | 58 | 61 | |
|---|---|---|---|---|---|---|---|
| SEAT TUBE (A1) | 450 mm | 480 mm | 510 mm | 530 mm | 560 mm | 580 mm | 610 mm |
| TOP TUBE (B) | 505 mm | 515 mm | 525 mm | 545 mm | 560 mm | 575 mm | 590 mm |
| REACH (R) | 371,1 mm | 371,1 mm | 374,5 mm | 380,4 mm | 382,1 mm | 384,4 mm | 385,5 mm |
| STACK (S) | 538,9 mm | 538,9 mm | 563,4 mm | 575,9 mm | 602,4 mm | 625,4 mm | 650,4 mm |
| SEAT TUBE ANGLE (C) | 76° | 75° | 75° | 74° | 73,5° | 73° | 72,5° |
| STEERING TUBE ANGLE (D) | 71,8° | 71,8° | 72° | 72,3° | 73,5° | 73,5° | 74° |
| CHAIN-STAY LENGTH (E) | 404 mm | 404 mm | 404 mm | 404 mm | 406 mm | 410 mm | 410 mm |
| BB TO FORK LENGTH (F) | 576,9 mm | 576,9 mm | 586,4 mm | 593,2 mm | 590 mm | 599 mm | 602 mm |
| HEAD TUBE (H) | 125 mm | 125 mm | 150 mm | 162 mm | 180 mm | 204 mm | 228 mm |
| HANDLEBAR WIDTH C/C (M) | 400 mm | 400 mm | 420 mm | 420 mm | 420 mm | 420 mm | 440 mm |
| STEM LENGTH (N) | 90 mm | 90 mm | 100 mm | 110 mm | 110 mm | 120 mm | 120 mm |
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