BMC Kaius 01 (2027) – geometry

Name: BMC Kaius 01 (2027)
Brand: BMC

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

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

Measure	Kaius 01 (2027) 54
Frame
Stackmm	561
Reachmm	396
Stack / Reach	1.42
Head angle°	70.8°
Seat angle°	73.8°
Head tubemm	126
Seat tubemm	471
Top tube (effective)mm	559
Chainstaymm	432
Rear centre (horizontal)mm	425
Wheelbasemm	1027
Front centremm	614
BB dropmm	79
BB heightmm	277
Fork offsetmm	50
Trailmm	72
Fork axle-to-crownmm	397
Cockpit & riding position
Bar reachmm	470
Bar stackmm	619
Saddle – barmm	671
Saddle-to-bar dropmm	72

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

Geometry table BMC Kaius 01 (2027)

Gravel · 700c · Sizes 47–61 · Stack 521–631 mm · Reach 385–409 mm · Head angle 70.8–71.6°

Measure	47	51	54	56	58	61
Stackmm	521	541	561	581	606	631
Reachmm	385	392	396	400	405	409
Stack / Reach	1.35	1.38	1.42	1.45	1.50	1.54
Head angle°	70.8°	70.8°	70.8°	71.6°	71.6°	71.6°
Seat angle°	74.3°	74.3°	73.8°	73.8°	73.8°	73.8°
Head tubemm	88	109	126	147	173	199
Seat tubemm	429	449	471	485	509	533
Top tube (effective)mm	531	544	559	569	587	598
Chainstaymm	432	432	432	432	432	432
Rear centre (horizontal)mm	425	425	425	425	425	425
Wheelbasemm	1010	1024	1027	1032	1045	1058
Front centremm	597	611	614	619	633	645
BB dropmm	79	79	79	79	79	79
BB heightmm	277	277	277	277	277	277
Fork offsetmm	50	50	50	45	45	45
Trailmm	72	72	72	72	72	72
Fork axle-to-crownmm	397	397	397	397	397	397

italic = calculated from the other values · Source: Geometry table BMC, as of Oct 25, 2026

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.

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.

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

BMC Kaius 01 (2027) – geometry

Similar geometry

Similar to Kaius 01 (2027) 54

Geometry profile