
Giro
Register II MIPS
Everyday adult helmet with MIPS and a simple dial fit.
Universal Adult, 54–61 cm
View on AmazonPrice and availability on Amazon
Orbea started in 1840 in Mallabia in the Basque Country, first as a gun maker, and has been a worker-owned bicycle cooperative for decades. It sells road, mountain, gravel, and e-bikes. This page has Orbea’s charts for those categories. Orca and Occam do not share one numbering system. Pick the category chart, then confirm stack and reach on the current Orbea geometry sheet.
Official website →Height ranges compared
Used sizes share one height scale, so overlapping and identical ranges are visible before you read a single table.
Height ranges on this page, from 151 to 202 cm. 47: 155–163 cm. 49: 160–168 cm. 51: 165–173 cm. 53: 170–178 cm. 55: 176–184 cm. 57: 182–190 cm. 60: 188–198 cm.
Height ranges on this page, from 154 to 200 cm. S: 158–168 cm. M: 166–177 cm. L: 175–186 cm. XL: 184–196 cm.
Height ranges on this page, from 151 to 201 cm. XS: 155–164 cm. S: 162–172 cm. M: 170–180 cm. L: 178–188 cm. XL: 186–197 cm.
Pick the category that matches the bike, then confirm the exact model.
| Size | Height | Inseam |
|---|---|---|
| 47 | 155-163 cm | 69-74 cm |
| 49 | 160-168 cm | 72-77 cm |
| 51 | 165-173 cm | 75-80 cm |
| 53 | 170-178 cm | 78-83 cm |
| 55 | 176-184 cm | 81-87 cm |
| 57 | 182-190 cm | 86-91 cm |
| 60 | 188-198 cm | 90-96 cm |
Size
47
Height
155-163 cm
Inseam: 69-74 cm
Size
49
Height
160-168 cm
Inseam: 72-77 cm
Size
51
Height
165-173 cm
Inseam: 75-80 cm
Size
53
Height
170-178 cm
Inseam: 78-83 cm
Size
55
Height
176-184 cm
Inseam: 81-87 cm
Size
57
Height
182-190 cm
Inseam: 86-91 cm
Size
60
Height
188-198 cm
Inseam: 90-96 cm
| Size | Height | Inseam |
|---|---|---|
| S | 158-168 cm | 71-77 cm |
| M | 166-177 cm | 76-82 cm |
| L | 175-186 cm | 81-87 cm |
| XL | 184-196 cm | 86-93 cm |
Size
S
Height
158-168 cm
Inseam: 71-77 cm
Size
M
Height
166-177 cm
Inseam: 76-82 cm
Size
L
Height
175-186 cm
Inseam: 81-87 cm
Size
XL
Height
184-196 cm
Inseam: 86-93 cm
| Size | Height | Inseam |
|---|---|---|
| XS | 155-164 cm | 69-74 cm |
| S | 162-172 cm | 73-79 cm |
| M | 170-180 cm | 78-84 cm |
| L | 178-188 cm | 83-89 cm |
| XL | 186-197 cm | 88-95 cm |
Size
XS
Height
155-164 cm
Inseam: 69-74 cm
Size
S
Height
162-172 cm
Inseam: 73-79 cm
Size
M
Height
170-180 cm
Inseam: 78-84 cm
Size
L
Height
178-188 cm
Inseam: 83-89 cm
Size
XL
Height
186-197 cm
Inseam: 88-95 cm
Helmet, light, lock, bottle, and a pant-leg strap. Size the bike here; buy the complete adult bike at a shop.

Giro
Everyday adult helmet with MIPS and a simple dial fit.
Universal Adult, 54–61 cm
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NiteRider
Compact USB headlight for commuting and dusk rides.
Handlebar mount, 300 lumens
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Kryptonite
Hardened U-lock plus a cable for wheels or a locked-together pair.
Fits most road, gravel, and hybrid frames
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CamelBak
Insulated squeeze bottle for everyday rides.
Fits a standard ~73 mm cage
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Green Guru
Upcycled inner-tube strap that keeps a pant leg off the chain.
Adjustable hook-and-loop, about 16 in long
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Height filters the chart. Cycling inseam decides which overlapping size to keep. The method is the same for every brand.
Height
Take shoes off and stand tall, looking straight ahead. A helper should rest a flat object on the crown of your head, then run a tape from the floor to the underside of that object. Save the number in inches and centimeters — charts use both.
Inseam
Stand tall and barefoot with feet slightly apart. Ask a helper to measure vertically from your crotch to the floor. Keep your legs straight and feet flat.
Need the full sequence, including between-size rules? See how to choose a bike size.
Use your height on the Road, Mountain and Gravel charts on this page. On the road table, 160-163 cm sits in both 47 and 49. Cycling inseam and standover pick the side. Then check stack and reach for the exact Orbea model.
Not safely. Orbea Road, Mountain and Gravel charts on this page are separate. A Orbea 47 on the road table and a Orbea S on the mountain table are not interchangeable.
The Road, Mountain and Gravel charts on this page include 47, 49, 51 (155-198 cm on the road table). Verify the current Orbea model chart on the official site before purchase.
Sources
Brand-level ranges on this page are compiled from published size data. Confirm the current model chart before you buy.
Related charts
Bike size chart
General height and inseam ranges before you lock a brand label.
Road bike size chart
Compare Orbea road sizing against common frame-size ranges.
Mountain bike size chart
Compare Orbea MTB sizing against trail and hardtail fit ranges.
Gravel bike size chart
Compare Orbea gravel sizing against general gravel fit ranges.
All brand size charts
Compare this brand with other bike brand size charts.
How to choose a bike size
Measure height and cycling inseam, then confirm standover and reach.