Kaius 01 (2027) vs. Crux 5 (2027)

A

BMC · Gravel · 700cManufacturer data · as of Oct 25, 2026Source

Cockpit: 20 mm spacers · 90 mm stem · -6° (stock)

SpacersStemAngle °

Saddle: same saddle height · 0 mm setback · centred (default)

Saddle heightSetbackForward (+)/back

B

Specialized · Gravel · 700cManufacturer data · as of Oct 18, 2026Source

Cockpit: 20 mm spacers · 90 mm stem · -6° (stock)

SpacersStemAngle °

Saddle: same saddle height · 0 mm setback · centred (default)

Saddle heightSetbackForward (+)/back

Reach: Horizontal distance from the bottom bracket to the top of the head tube. More reach = more stretched-out position. · grid 10 cm

Crux 5 (2027) 54 vs. Kaius 01 (2027) 54: 8 mm less reach · 0.7° steeper seat angle · 7 mm shorter chainstays

Measure	Kaius 01 (2027) 54	Crux 5 (2027) 54
Frame
Stackmm	561	560−1
Reachmm	396	388−8
Stack / Reach	1.42	1.44+0.03
Head angle°	70.8°	71.0°+0.2°
Seat angle°	73.8°	74.5°+0.7°
Head tubemm	126	125−1
Seat tubemm	471	473+2
Top tube (effective)mm	559	543−16
Chainstaymm	432	425−7
Rear centre (horizontal)mm	425	418−7
Wheelbasemm	1027	1026−1
Front centremm	614	613−1
BB dropmm	79	78−1
BB heightmm	277	280+3
Fork offsetmm	50	51+1
Trailmm	72	69−3
Fork axle-to-crownmm	397	401+4
Cockpit & riding position
Bar reachmm	470	463−8
Bar stackmm	619	618−1
Saddle – barmm	671	655−16
Saddle-to-bar dropmm	72	76+4

italic = calculated · tap a row to pin the measure in the drawing · Δ relative to Kaius 01 (2027)

Size finder · transfer your fit

Transfer your riding position to a new bike

Enter your well-fitting bike with saddle height, seatpost and cockpit. For every size of the new bike we calculate the stem, spacers, saddle height, setback and saddle position that reproduce the same contact points. This is a geometric approximation without guarantee and does not replace a professional bike fit.

1

Your bike – how you sit today

Saddle

mmmmmm

Cockpit

mmmm°

Saddle: 201 mm behind · 691 mm above BB
Handlebar: 470 mm ahead · 619 mm above BB
Saddle–bar: 671 mm · drop 72 mm

Saddle height: bottom bracket centre to top of saddle along the seat-tube axis. Saddle fore/aft: + forward, − back. Spacers incl. top cap, handlebar centre = stem clamp.

2

New bike – what do I need to set up?

Choose the bike you want to transfer your position to. We calculate every size.

Explore

All frame sizes at a glance

All frame sizes by stack and reach or any other measure – click a dot or line to add the bike to the comparison.

1040 of 1040 sizes · 159 models

Each dot is a frame size. Coloured dots with a letter = current comparison.

Similar to Kaius 01 (2027) 54

only Gravel

Similarity over the axes of the geometry profile below; stack and reach count 1.5×. The best-matching size per model, filters are respected.

Geometry profile

Each line is a frame size across all selected measures. Drag on an axis to filter a range – this also affects the chart and the similarity list.

Drag on an axis to filter a range · click a line to compare the bike

Add a bike

BrandModelModel year *CategoryWheel (front)Wheel rearTyre clearance, max. (mm)Source (manufacturer page with geometry table) *

Paste a geometry table

Select the table on the manufacturer's page, copy it and paste it here. Sizes as columns or rows, German or English; values like “435/432” for flip chips are recognised.

Sizes (mm / degrees · * required · setting e.g. “High”, “Low”, “Mullet”)

Size*	Setting	Stack*	Reach*	Head ∠ °*	Seat ∠ °*	Head tube*	Chainstay*	BB drop*	BB drop rear	Seat tube	Top tube	Wheelbase	Fork offset	Axle-to-crown	BB height	Front ctr.	Trail	Stem	Spacers