Festka Spectre Gravel Geometry, Sizes & Bike Fit

Festka Spectre Gravel geometry (2026) — compare stack, reach, and every supported size, then open the TrainCraft calculator with this bike preselected.

Supported sizes

XXS, XS, S, M, L, XL, XXL

Family

race geometry

This bike leans toward an aggressive front end, faster steering, and a more performance-oriented position.

What to compare

Stack, reach, setup

Use this guide to compare stack, reach, and gravel-specific front-end assumptions before choosing a frame size.

Check my size with measurements Compare geometry first View original geometry source

Quick size check

What Festka Spectre Gravel 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.

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
XXS	530 mm	356 mm	510 mm	111 mm	70 mm	165 mm	Check with my measurements
XS	539 mm	363 mm	520 mm	118 mm	70 mm	165 mm	Check with my measurements
S	551 mm	370 mm	530 mm	130 mm	70 mm	170 mm	Check with my measurements
M	575 mm	379 mm	545 mm	150 mm	80 mm	170 mm	Check with my measurements
L	581 mm	392 mm	560 mm	160 mm	80 mm	170 mm	Check with my measurements
XL	614 mm	403 mm	580 mm	195 mm	90 mm	172.5 mm	Check with my measurements
XXL	633 mm	411 mm	600 mm	215 mm	100 mm	175 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 Festka Spectre Gravel.

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 sizes are available for the Festka Spectre Gravel?

TrainCraft currently tracks these Festka Spectre Gravel sizes: XXS, XS, S, M, L, XL, XXL. The calculator uses each size's published geometry and stock cockpit assumptions to compare fit outcomes.

Can I use the TrainCraft calculator for Festka Spectre Gravel sizing?

Yes. Open the calculator from this page to preload the Festka Spectre Gravel, then compare sizes against your body measurements, fit priorities, flexibility, and riding posture preferences.

What should I compare on the Festka Spectre Gravel before picking a size?

Start with stack, reach, effective top tube, and the stock stem/crank setup. TrainCraft uses those numbers to estimate cockpit reach, bar drop, saddle position, and how much adjustment headroom each size leaves.