
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
BMC (Bicycle Manufacturing Company) started in Grenchen, Switzerland, in 1994 and still designs road, mountain, and gravel bikes there. The brand grew out of a Swiss machine shop and now sells Teammachine, Roadmachine, and Fourstroke families alongside gravel. This page has BMC’s brand-level charts for those three categories. Labels overlap across types, so pick the table for the bike you will ride before comparing stack and reach.
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 154 to 204 cm. 47: 158–166 cm. 51: 164–173 cm. 54: 171–179 cm. 56: 177–185 cm. 58: 183–191 cm. 61: 189–200 cm.
Height ranges on this page, from 154 to 203 cm. S: 158–168 cm. M: 166–177 cm. L: 175–187 cm. XL: 185–199 cm.
Height ranges on this page, from 154 to 204 cm. 47: 158–166 cm. 51: 164–174 cm. 54: 172–180 cm. 56: 178–186 cm. 58: 184–193 cm. 61: 191–200 cm.
Pick the category that matches the bike, then confirm the exact model.
| Size | Height | Inseam |
|---|---|---|
| 47 | 158-166 cm | 71-75 cm |
| 51 | 164-173 cm | 74-79 cm |
| 54 | 171-179 cm | 78-83 cm |
| 56 | 177-185 cm | 82-87 cm |
| 58 | 183-191 cm | 86-91 cm |
| 61 | 189-200 cm | 90-97 cm |
Size
47
Height
158-166 cm
Inseam: 71-75 cm
Size
51
Height
164-173 cm
Inseam: 74-79 cm
Size
54
Height
171-179 cm
Inseam: 78-83 cm
Size
56
Height
177-185 cm
Inseam: 82-87 cm
Size
58
Height
183-191 cm
Inseam: 86-91 cm
Size
61
Height
189-200 cm
Inseam: 90-97 cm
| Size | Height | Inseam |
|---|---|---|
| S | 158-168 cm | 71-76 cm |
| M | 166-177 cm | 75-81 cm |
| L | 175-187 cm | 80-87 cm |
| XL | 185-199 cm | 86-95 cm |
Size
S
Height
158-168 cm
Inseam: 71-76 cm
Size
M
Height
166-177 cm
Inseam: 75-81 cm
Size
L
Height
175-187 cm
Inseam: 80-87 cm
Size
XL
Height
185-199 cm
Inseam: 86-95 cm
| Size | Height | Inseam |
|---|---|---|
| 47 | 158-166 cm | 71-76 cm |
| 51 | 164-174 cm | 75-80 cm |
| 54 | 172-180 cm | 79-84 cm |
| 56 | 178-186 cm | 83-88 cm |
| 58 | 184-193 cm | 87-92 cm |
| 61 | 191-200 cm | 91-97 cm |
Size
47
Height
158-166 cm
Inseam: 71-76 cm
Size
51
Height
164-174 cm
Inseam: 75-80 cm
Size
54
Height
172-180 cm
Inseam: 79-84 cm
Size
56
Height
178-186 cm
Inseam: 83-88 cm
Size
58
Height
184-193 cm
Inseam: 87-92 cm
Size
61
Height
191-200 cm
Inseam: 91-97 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
View on AmazonPrice and availability on Amazon

NiteRider
Compact USB headlight for commuting and dusk rides.
Handlebar mount, 300 lumens
View on AmazonPrice and availability on Amazon

Kryptonite
Hardened U-lock plus a cable for wheels or a locked-together pair.
Fits most road, gravel, and hybrid frames
View on AmazonPrice and availability on Amazon

CamelBak
Insulated squeeze bottle for everyday rides.
Fits a standard ~73 mm cage
View on AmazonPrice and availability on Amazon

Green Guru
Upcycled inner-tube strap that keeps a pant leg off the chain.
Adjustable hook-and-loop, about 16 in long
View on AmazonPrice and availability on Amazon
As an Amazon Associate we earn from qualifying purchases. Affiliate disclosure.
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, 164-166 cm sits in both 47 and 51. Cycling inseam and standover pick the side. Then check stack and reach for the exact BMC model.
Not safely. BMC Road, Mountain and Gravel charts on this page are separate. A BMC 47 on the road table and a BMC S on the mountain table are not interchangeable.
The Road, Mountain and Gravel charts on this page include 47, 51, 54 (158-200 cm on the road table). Verify the current BMC 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 BMC road sizing against common frame-size ranges.
Mountain bike size chart
Compare BMC MTB sizing against trail and hardtail fit ranges.
Gravel bike size chart
Compare BMC 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.