Specialized Tarmac SL8 (2024) – geometry

Name: Specialized Tarmac SL8 (2024)
Brand: Specialized

Specialized · Road · 700cManufacturer data · as of Oct 25, 2026Source

Cockpit: 20 mm spacers · 100 mm stem · -6°

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	Tarmac SL8 (2024) 54
Frame
Stackmm	544
Reachmm	384
Stack / Reach	1.42
Head angle°	73.0°
Seat angle°	74.0°
Head tubemm	137
Seat tubemm	473
Top tube (effective)mm	541
Chainstaymm	410
Rear centre (horizontal)mm	404
Wheelbasemm	978
Front centremm	579
BB dropmm	72
BB heightmm	268
Fork offsetmm	44
Trailmm	58
Fork axle-to-crownmm	370
Cockpit & riding position
Bar reachmm	470
Bar stackmm	601
Saddle – barmm	669
Saddle-to-bar dropmm	91

italic = calculated · tap a row to pin the measure in the drawing · Δ relative to Tarmac SL8 (2024)

Geometry table Specialized Tarmac SL8 (2024)

Road · 700c · Sizes 44–61 · Stack 501–612 mm · Reach 366–408 mm · Head angle 70.5–74.0°

Measure	44	49	52	54	56	58	61
Stackmm	501	514	527	544	565	591	612
Reachmm	366	375	380	384	395	402	408
Stack / Reach	1.37	1.37	1.39	1.42	1.43	1.47	1.50
Head angle°	70.5°	71.8°	72.5°	73.0°	73.5°	73.5°	74.0°
Seat angle°	75.5°	75.5°	74.0°	74.0°	73.5°	73.5°	73.0°
Head tubemm	99	109	120	137	157	184	204
Seat tubemm	433	445	456	473	494	515	545
Top tube (effective)mm	496	509	531	541	563	577	595
Chainstaymm	410	410	410	410	410	410	410
Rear centre (horizontal)mm	403	403	403	404	404	404	404
Wheelbasemm	970	973	975	978	991	1006	1013
Front centremm	572	574	577	579	592	606	613
BB dropmm	74	74	74	72	72	72	72
BB heightmm	266	266	266	268	268	268	268
Fork offsetmm	47	47	47	44	44	44	44
Trailmm	71	63	58	58	55	55	52
Fork axle-to-crownmm	370	370	370	370	370	370	370

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

Size finder · transfer your fit

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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: 198 mm behind · 692 mm above BB
Handlebar: 470 mm ahead · 601 mm above BB
Saddle–bar: 669 mm · drop 91 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.

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Similar to Tarmac SL8 (2024) 54

only Road

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

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

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

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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

Specialized Tarmac SL8 (2024) – geometry

Similar geometry

Similar to Tarmac SL8 (2024) 54

Geometry profile