Shave (2026) vs. Roubaix SL8 (2024)

A

Rose · Road · 700c · tyres up to 36 mmManufacturer data · as of Oct 25, 2026Source

Cockpit: 20 mm spacers · 100 mm stem · -6° (stock)

SpacersStemAngle °

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

Saddle heightSetbackForward (+)/back

B

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

Cockpit: 20 mm spacers · 100 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

Roubaix SL8 (2024) 54 vs. Shave (2026) M: 0.7° slacker head angle · 16 mm longer wheelbase · 6 mm longer chainstays

Measure	Shave (2026) M	Roubaix SL8 (2024) 54
Frame
Stackmm	584	585+1
Reachmm	378	381+3
Stack / Reach	1.54	1.54−0.01
Head angle°	73.0°	72.3°−0.7°
Seat angle°	74.0°	74.0°±0
Head tubemm	157	122−35
Seat tubemm	492	465−27
Top tube (effective)mm	545	550+5
Chainstaymm	414	420+6
Rear centre (horizontal)mm	408	413+5
Wheelbasemm	989	1005+16
Front centremm	586	598+12
BB dropmm	73	78+5
BB heightmm	270	270±0
Fork offsetmm	45	47+2
Trailmm	58	61+3
Fork axle-to-crownmm	–	375
Cockpit & riding position
Bar reachmm	464	467+2
Bar stackmm	641	643+2
Saddle – barmm	663	665+2
Saddle-to-bar dropmm	51	49−2
Tyre clearancemm	36	–

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

mmmmmm

Cockpit

mmmm°

Saddle: 198 mm behind · 692 mm above BB
Handlebar: 464 mm ahead · 641 mm above BB
Saddle–bar: 663 mm · drop 51 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 Shave (2026) M

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

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