BikeGeoLab
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Santa Cruz Tallboy (2027) – geometry

A
Santa Cruz · Trail · 29″Manufacturer data · as of Oct 18, 2026Source
Cockpit: 15 mm spacers · 45 mm stem · 0°
Saddle: same saddle height · 0 mm setback · centred (default)
Fixpoint
455
Reach: Horizontal distance from the bottom bracket to the top of the head tube. More reach = more stretched-out position. · grid 10 cm
MeasureTallboy (2027) M · High
Frame
Stackmm624
Reachmm455
Stack / Reach1.37
Head angle°65.1°
Seat angle°77.3°
Head tubemm115
Seat tubemm400
Top tube (effective)mm596
Chainstaymm435
Rear centre (horizontal)mm434
Wheelbasemm1212
Front centremm777
BB dropmm36
BB heightmm336
Fork offsetmm46
Trailmm122
Fork axle-to-crownmm–
Cockpit & riding position
Bar reachmm481
Bar stackmm675
Saddle – barmm639
Saddle-to-bar dropmm28

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

Geometry table Santa Cruz Tallboy (2027)

Trail · 29″ · Sizes XS–XXL · Stack 601–662 mm · Reach 407–520 mm · Head angle 64.8–65.1°

MeasureXS · HighXS · LowS · HighS · LowM · HighM · LowL · HighL · LowXL · HighXL · LowXXL · HighXXL · Low
Stackmm601603610612624626633635646649660662
Reachmm410407435432455452475472495492520517
Stack / Reach1.471.481.401.421.371.381.331.351.311.321.271.28
Head angle°65.1°64.8°65.1°64.8°65.1°64.8°65.1°64.8°65.1°64.8°65.1°64.8°
Seat angle°77.6°77.3°77.6°77.3°77.3°77.0°77.4°77.2°77.5°77.3°77.5°77.3°
Head tubemm9090100100115115125125140140155155
Seat tubemm360370380380400400420430450450500500
Top tube (effective)mm542542569570596596616616637638666666
Chainstaymm435436435436435436438439440441444445
Rear centre (horizontal)mm434434434434434434437437439439443443
Wheelbasemm115611561185118612121212123912391267126713021303
Front centremm721721750750777776801801827827858858
BB dropmm363936393639363936393639
BB heightmm336333336333336333336333336333336333
Fork offsetmm464545464645464546454545
Trailmm122125123124122125122125122126123125

italic = calculated from the other values · Source: Geometry table Santa Cruz, as of Oct 18, 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.

1

Your bike – how you sit today

Saddle

Cockpit

Saddle
158 mm behind · 702 mm above BB
Handlebar
481 mm ahead · 675 mm above BB
Saddle–bar
639 mm · drop 28 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
350400450500550450500550600650700Reach (mm)Stack (mm)A

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

Similar to Tallboy (2027) M · High

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.

Stackmm500600Drag to filter Stack · click to remove the filterReachmm350400450500Drag to filter Reach · click to remove the filterHead angle°65.0°70.0°Drag to filter Head angle · click to remove the filterSeat angle°72.0°74.0°76.0°78.0°Drag to filter Seat angle · click to remove the filterWheelbasemm10001200Drag to filter Wheelbase · click to remove the filterChainstaymm420440Drag to filter Chainstay · click to remove the filterBB heightmm300350Drag to filter BB height · click to remove the filterTrailmm50100150Drag to filter Trail · click to remove the filter

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

BikeGeoLab

Making bike geometry visible – with verified manufacturer data, model year and source.

Geometry data comes from the manufacturers' geometry tables, each linked with source and retrieval date. No guarantee for correctness – data may be wrong or outdated, calculated values and the size finder are approximations and do not replace a professional bike fit. Brand and model names belong to their respective owners; there is no affiliation with the manufacturers.

Add a bike

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*SettingStack*Reach*Head ∠ °*Seat ∠ °*Head tube*Chainstay*BB drop*BB drop rearSeat tubeTop tubeWheelbaseFork offsetAxle-to-crownBB heightFront ctr.TrailStemSpacers