Road Mountain / MTB Gravel City & hybrid BMX Dirt jump Triathlon / TT Kids Women Men

BIKZER · Sizing guides

Women’s bike size guide and calculator

Fit depends on your proportions and the particular bike. Compare unisex and women’s models using the same geometry checks.

Editorial responsibility: Gonzalo Caballero González · Reviewed: 2026-09-18

BIKZER / Sizing guides

Find your reference bike size

Your sizing reference

Enter your measurements to check the chart.

Read our method and limitations →

01 / How to measure

Height

Stand barefoot against a wall and look straight ahead.
Place a level book on your head and mark its lower edge.
Measure from the floor to the mark. Repeat to check consistency.

02 / How to measure

Inseam

Stand barefoot against a wall with your feet slightly apart.
Hold a level book between your legs with firm, comfortable pressure.
Measure from the floor to the top edge. Do not use your trouser inseam.

Look for dimensions behind the label

Women do not all share the same body proportions. Some ranges offer smaller sizes or different components, but check what actually changes: reach, stack, cranks, handlebar and saddle. Branding or colour alone does not show a geometry difference.

Brake reach and control

Check that you can brake confidently from your usual hand position. Some controls allow lever reach adjustment; follow the component instructions. This can improve access but cannot by itself correct an overlong cockpit or an unsuitable frame.

When looking for a small frame

Check minimum saddle height, top tube clearance and the model’s wheel options. Do not automatically choose a children’s bike because it is shorter: compare intended use, load limits and components. If this chart does not cover your height, look for a range with documented geometry for your measurements.

Frequently asked questions

Do I need a women-specific bike?

Not necessarily. Compare each model’s fit and components. A commercial category cannot replace a test ride.

What size do I need at 160 cm?

Choose the discipline first. Road, MTB and city bikes use different references; add inseam and check the manufacturer’s chart.

Does this calculator size down for women?

No. It uses the same discipline charts and does not assume body proportions from gender.

Sources and model checks

Reference size chart

Road

Bikzer reference ranges are not universal size conversions between brands. Overlapping ranges provide several options. Charts always show both units.

Scroll the table sideways to see every column.

Reference size chart · Road
Frame (cm)	Rider height	Reference inseam
47-49	150–158 cm4′ 11.06″–5′ 2.2″	70–73 cm27.56–28.74 in
49-51	158–163 cm5′ 2.2″–5′ 4.17″	73–76 cm28.74–29.92 in
51-53	163–168 cm5′ 4.17″–5′ 6.14″	76–79 cm29.92–31.1 in
53-55	168–173 cm5′ 6.14″–5′ 8.11″	79–82 cm31.1–32.28 in
55-56	173–178 cm5′ 8.11″–5′ 10.08″	82–84 cm32.28–33.07 in
56-58	178–183 cm5′ 10.08″–6′ 0.05″	84–87 cm33.07–34.25 in
58-60	183–188 cm6′ 0.05″–6′ 2.02″	87–90 cm34.25–35.43 in
60-62	188–193 cm6′ 2.02″–6′ 3.98″	90–93 cm35.43–36.61 in
62+	193–210 cm6′ 3.98″–6′ 10.68″	93–110 cm36.61–43.31 in

Mountain / MTB

Bikzer reference ranges are not universal size conversions between brands. Overlapping ranges provide several options. Charts always show both units.

Scroll the table sideways to see every column.

Reference size chart · Mountain / MTB
Frame	Rider height	Reference inseam
XS	145–155 cm4′ 9.09″–5′ 1.02″	69–73 cm27.17–28.74 in
S	155–165 cm5′ 1.02″–5′ 4.96″	74–78 cm29.13–30.71 in
M	165–176 cm5′ 4.96″–5′ 9.29″	79–83 cm31.1–32.68 in
M/L	173–180 cm5′ 8.11″–5′ 10.87″	81–86 cm31.89–33.86 in
L	177–188 cm5′ 9.69″–6′ 2.02″	84–89 cm33.07–35.04 in
XL	188–195 cm6′ 2.02″–6′ 4.77″	89–91 cm35.04–35.83 in
2XL	195–203 cm6′ 4.77″–6′ 7.92″	91–97 cm35.83–38.19 in

BMX

Bikzer reference ranges are not universal size conversions between brands. Overlapping ranges provide several options. Charts always show both units.

Scroll the table sideways to see every column.

Reference size chart · BMX
Top tube (TT) / Wheel (in)	Rider height
TT 18"-20" / Ø 20"	135–155 cm4′ 5.15″–5′ 1.02″
TT 20"-20.25" / Ø 20"	147–162 cm4′ 9.87″–5′ 3.78″
TT 20"-20.5" / Ø 20"	157–173 cm5′ 1.81″–5′ 8.11″
TT 20.25"-21" / Ø 20"	167–183 cm5′ 5.75″–6′ 0.05″
TT 20.75"+ / Ø 20"	180–220 cm5′ 10.87″–7′ 2.61″

City & hybrid

Bikzer reference ranges are not universal size conversions between brands. Overlapping ranges provide several options. Charts always show both units.

Scroll the table sideways to see every column.

Reference size chart · City & hybrid
Frame	Rider height
XS	148–158 cm4′ 10.27″–5′ 2.2″
S	158–168 cm5′ 2.2″–5′ 6.14″
M	168–178 cm5′ 6.14″–5′ 10.08″
L	178–185 cm5′ 10.08″–6′ 0.83″
XL	185–193 cm6′ 0.83″–6′ 3.98″
XXL	193–198 cm6′ 3.98″–6′ 5.95″

Gravel

Bikzer reference ranges are not universal size conversions between brands. Overlapping ranges provide several options. Charts always show both units.

Scroll the table sideways to see every column.

Reference size chart · Gravel
Frame (cm)	Rider height	Reference inseam
43/45	144.7–152.4 cm4′ 8.97″–5′ 0″	67.3–71.2 cm26.5–28.03 in
47/48	152.4–167.6 cm5′ 0″–5′ 5.98″	71.2–75 cm28.03–29.53 in
51	167.6–172.7 cm5′ 5.98″–5′ 7.99″	75–77 cm29.53–30.31 in
54	172.7–177.8 cm5′ 7.99″–5′ 10″	76–82 cm29.92–32.28 in
56	177.8–182.8 cm5′ 10″–5′ 11.97″	81–85 cm31.89–33.46 in
58	182.8–187.9 cm5′ 11.97″–6′ 1.98″	84–87.1 cm33.07–34.29 in
61	187.9–195.5 cm6′ 1.98″–6′ 4.97″	87.1–91.1 cm34.29–35.87 in

Dirt jump

Bikzer reference ranges are not universal size conversions between brands. Overlapping ranges provide several options. Charts always show both units.

Scroll the table sideways to see every column.

Reference size chart · Dirt jump
Wheel and geometry	Rider height
24" · TT ~20"-22"	135–155 cm4′ 5.15″–5′ 1.02″
24" · TT ~20"-22.7"	150–175 cm4′ 11.06″–5′ 8.9″
26" · Reach ~410-415 mm; standover ~710-715 mm	155–170 cm5′ 1.02″–5′ 6.93″
26" · Reach ~425-435 mm; standover ~710-715 mm	170–210 cm5′ 6.93″–6′ 10.68″
26" · TT ~21"-24.5"	160–185 cm5′ 2.99″–6′ 0.83″

Triathlon / TT

Bikzer reference ranges are not universal size conversions between brands. Overlapping ranges provide several options. Charts always show both units.

Scroll the table sideways to see every column.

Reference size chart · Triathlon / TT
Frame (cm)	Rider height	Reference inseam
47-49	150–160 cm4′ 11.06″–5′ 2.99″	65–70 cm25.59–27.56 in
50-52	160–170 cm5′ 2.99″–5′ 6.93″	70–75 cm27.56–29.53 in
53-54	170–175 cm5′ 6.93″–5′ 8.9″	76–80 cm29.92–31.5 in
55-56	176–182 cm5′ 9.29″–5′ 11.65″	80–85 cm31.5–33.46 in
57-59	183–190 cm6′ 0.05″–6′ 2.8″	85–90 cm33.46–35.43 in
60-62	190–205 cm6′ 2.8″–6′ 8.71″	90–110 cm35.43–43.31 in

Kids

Children’s reference based on Trek’s guide, converted to centimetres. Fit also depends on the model, brake reach and minimum saddle height. The 26″ range is capped at 158 cm in this tool.

Scroll the table sideways to see every column.

Reference size chart · Kids
Wheel	Rider height	Reference inseam
12″	91.44–99.06 cm3′ 0″–3′ 3″	38.1–45.72 cm15–18 in
16″	104.14–121.92 cm3′ 5″–4′ 0″	40.64–55.88 cm16–22 in
20″	114.3–137.16 cm3′ 9″–4′ 6″	48.26–63.5 cm19–25 in
24″	124.46–149.86 cm4′ 1″–4′ 11″	58.42–71.12 cm23–28 in
26″	142.24–158 cm4′ 8″–5′ 2.2″	≥ 63.5 cm≥ 25 in