Bianchi Aquila RC geometryTime trial / Triathlon · 2026 · 3 sizes, from S to L
The Bianchi Aquila RC is a time trial / triathlon bike available in 3 sizes, from S to L. Stack ranges from 486 to 524 mm and reach from 402 to 440 mm. Its geometry is low and long, with a racing fit. All sizes share 410 mm chainstays.
What size Aquila RC do I need?
Enter the stack and reach of a bike that fits you well and we will tell you which size is closest and how to set it up.
Enter your stack and reach to see which size fits you best.
Geometry chart by size
Measurements in mm and degrees, as published by Bianchi. The ones that matter most for choosing a size are in bold.
| Size | S | M | L |
|---|---|---|---|
| Stack | 486 | 500 | 524 |
| Reach | 402 | 420 | 440 |
| Effective top tube | 510 | 535 | 556 |
| Head tube length | 75 | 90 | 115 |
| Head angle | 72.0° | 72.0° | 72.0° |
| Chainstay length | 410 | 410 | 410 |
| Wheelbase | 986 | 1,009 | 1,036 |
| Front centre | 588 | 610 | 638 |
| BB drop | 75 | 75 | 75 |
| Fork length | 371 | 371 | 371 |
| Fork offset | 45 | 45 | 45 |
| Seat tube (method not stated) | 510 | 530 | 560 |
| Seat angle (method not stated) | 77.5° | 77.5° | 77.5° |
Source: Bianchi official website · data from 11 Nov 2026. Spot a mistake?
Stack and reach of every size
Higher means a taller front end; further right means a longer reach. The blue dot is your search.
Character of each size
Compared with other time trial / triathlon bikes. Further right means more of that quality.
Bikes with similar geometry (size M)
The closest size of other time trial / triathlon models, by stack and reach.
Frequently asked questions
What size Aquila RC do I need?
It depends on your position, not just your height. The most reliable way is to compare the stack and reach of a bike that fits you with those of each size (from 486/402 mm in size S to 524/440 mm in size L). The size finder on this page shows the closest size and the stem and spacers you would need.
What are the stack and reach of the Aquila RC in size M?
Stack of 500 mm and reach of 420 mm, with an effective top tube of 535 mm and a head angle of 72.0°.
Is the Aquila RC a racing or an endurance bike?
Racing. In size M its stack-to-reach ratio is at percentile 33 of time trial / triathlon bikes: a low, stretched position.