road bike•race geometry•2027
Spect Mira Geometry & Size Chart
Spect Mira geometry (2027), compare stack, reach, and every supported size, then open the TrainCraft calculator with this bike preselected.
- Supported sizes
- 48, 51, 54, 56, 58
- Family
- This bike leans toward an aggressive front end, faster steering, and a more performance-oriented position.
- What to compare
- Use this guide to compare stack, reach, and stock cockpit assumptions before choosing a frame size.
Quick size check
What Spect Mira size fits you?
Get an instant frame estimate, then continue into the full fit report to check cockpit reach, bar drop, and setup risks before you buy.
No account needed for this check. The full report keeps this bike preselected.
What you get after the size check
A complete setup now. A Fit Passport when you sign up.
A paid report unlocks the complete setup and print-ready PDF for this bike. No account is required. Create a free fit profile separately to save and reuse your fit.
Paid report for this bike
Compare every size and get saddle position, cockpit coordinates, stem, spacers, bar width and crank length. No account required.
Print-ready PDF included
Export the paid report as a clean A4 PDF to keep, print or take into the workshop when this bike is being set up.
Free Fit Passport for ongoing fitting
Create a free fit profile to save measurements and reports across devices, prefill new fits, recalculate after profile changes, fine-tune by symptoms and get the lower in-app report price.
Geometry and size breakdown
Use the geometry table as context, then enter your measurements above before opening the full fit report.
| Size | Stack | Reach | Top tube | Head tube | Stem | Crank | Size check |
|---|---|---|---|---|---|---|---|
| 48 | 508 mm | 362 mm | 521 mm | 69 mm | 90 mm | 165 mm | Check with my measurements |
| 51 | 519 mm | 376 mm | 535 mm | 87 mm | 90 mm | 170 mm | Check with my measurements |
| 54 | 542 mm | 384 mm | 550 mm | 109 mm | 100 mm | 170 mm | Check with my measurements |
| 56 | 565 mm | 392 mm | 565 mm | 130 mm | 100 mm | 172.5 mm | Check with my measurements |
| 58 | 588 mm | 401 mm | 581 mm | 157 mm | 110 mm | 172.5 mm | Check with my measurements |
How to use this guide
Start with the size table to narrow the geometry range you actually want. Then open the calculator to compare that geometry against your body dimensions, flexibility, and fit priorities.
The TrainCraft bike fit tool models saddle height, cockpit reach, and bar drop using the frame geometry plus stock cockpit assumptions for the Spect Mira.
That is more useful than a generic height chart because two sizes can both fit your height while requiring very different stems, spacers, or saddle positions.
FAQ
- What size Spect Mira should I get?
- It depends on more than your height. Two riders of the same height can need different Spect Mira sizes, because inseam, torso length and flexibility change the reach and bar drop that suit them. Enter your height and inseam in the size check on this page to see which size fits you.
- What height is each Spect Mira size for?
- Height ranges are only a rough guide: they overlap, and riders near the edge of a range often fit the next size better. The size check on this page uses your height and inseam to show where you land on the Spect Mira.
- Should I size up or down on the Spect Mira?
- Between two sizes, the smaller frame usually needs a longer stem and more spacers, and the larger one a shorter stem and a lower front. Which one works depends on your body and flexibility. The size check shows your size; the full fit gives the exact setup that size needs.
- What sizes are available for the Spect Mira?
- TrainCraft currently tracks these Spect Mira sizes: 48, 51, 54, 56, 58. The calculator uses each size's published geometry and stock cockpit assumptions to compare fit outcomes.
Rivals to put next to the Spect Mira
Matched sizes, stack and reach deltas, and a fit check for your measurements on both frames.
Related road bike guides
Use nearby model pages to compare positioning trends before choosing between similar bikes.
TrainCraft training
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