BMX SIZE &
GEOMETRY GUIDE
Find your correct frame size, read geometry numbers, and learn how to measure your rider in minutes.
FIND YOUR SIZE
RECOMMENDED CLASS
EXPERT XL / PRO
| FRAME CLASS | RIDER HEIGHT | WHEEL | TYPICAL AGE |
|---|---|---|---|
MICRO MINI | 90–112 cm | 18" or 20×1-1/8" | 4–7 yrs |
MINI | 112–127 cm | 20×1-1/8" | 6–9 yrs |
JUNIOR | 127–142 cm | 20×1-1/8" or 1-3/8" | 9–12 yrs |
EXPERT | 142–157 cm | 20×1-3/8" or 1.50" | 12–15 yrs |
EXPERT XL / PROYOU | 157–167 cm | 20×1.50" or 1.75" | 14–17 yrs |
PRO XL | 167–178 cm | 20×1.75" | 16+ yrs |
PRO XXL | 178–188 cm | 20×1.75" | Adult |
PRO XXXL / CRUISER | 188–220 cm | 20×1.75" or 24" | Adult |
FRAME GEOMETRY
All values are published geometry. Production frames may vary ±2 mm. Rows highlighted in red match your entered rider height.
| SIZE | RIDER HEIGHT | TT | CS | HTA | STA | BB HT | WB |
|---|---|---|---|---|---|---|---|
Micro Mini | 90–112 cm | 16.50" | 13.00" | 71.0° | 71.0° | 11.3" | 33.5" |
Mini | 112–127 cm | 17.50" | 13.50" | 71.5° | 71.0° | 11.3" | 34.5" |
Junior | 127–142 cm | 18.50" | 13.50" | 72.0° | 71.0° | 11.4" | 35.5" |
Expert | 142–157 cm | 19.50" | 13.75" | 72.0° | 71.0° | 11.4" | 36.5" |
Expert XL | 157–163 cm | 20.50" | 13.75" | 72.5° | 71.0° | 11.4" | 37.5" |
ProYOU | 163–170 cm | 21.00" | 14.00" | 73.0° | 71.5° | 11.5" | 38.0" |
Pro XL | 170–178 cm | 21.50" | 14.00" | 73.0° | 71.5° | 11.5" | 38.5" |
Pro XXL | 178–188 cm | 22.00" | 14.25" | 73.0° | 71.5° | 11.5" | 39.0" |
Pro XXXL | 188–210 cm | 22.50" | 14.25" | 73.0° | 71.5° | 11.5" | 39.5" |
KELAS BALAP BMX
Sistem kelas PBSI (Persatuan Balap Motor Indonesia) berdasarkan tinggi badan & usia — bukan skill level. Setiap kelas memiliki standar lintasan & teknis tersendiri.
Badan Resmi
PBSI / UCI BMX
MICRO MINI
90–112 cm · 4–7 tahun
Kelas pembuka untuk balap. Lintasan lebih pendek, rintangan lebih kecil. Fokus pada teknik dasar gate dan keseimbangan.
MINI
112–127 cm · 6–9 tahun
Mulai berlatih teknik jumping & manuver. Kompetisi PBSI daerah aktif di kelas ini.
JUNIOR
127–142 cm · 9–12 tahun
Transisi ke teknik yang lebih agresif. Kelas kompetitif di Kejurnas PBSI tingkat pelajar.
EXPERT
142–157 cm · 12–15 tahun
Kelas remaja utama. Banyak atlet PBSI nasional memulai karir dari kelas ini.
EXPERT XL / PRO
157–167 cm · 14–17 tahun
Kelas transisi menuju level elite. Performa frame & komponen mulai sangat berpengaruh.
PRO XL
167–178 cm · 16+ tahun
Kelas dewasa muda. Digunakan di kompetisi tingkat provinsi dan nasional PBSI.
PRO XXL
178–188 cm · Dewasa
Kelas dewasa standar internasional UCI. Dipakai di PON, Kejurnas, dan kualifikasi SEA Games.
CRUISER
185+ cm · Dewasa
Kelas khusus roda 24 inci. Lebih stabil di kecepatan tinggi, populer di kategori master/veteran.
Masih ragu kelas mana? Gunakan slider di atas untuk rekomendasi otomatis berdasarkan tinggi badan, atau hubungi kami via WhatsApp — kami bantu identifikasi kelas yang tepat.
HOW TO MEASURE
Rider Height
Stand straight against a wall without shoes. Mark the top of your head and measure from the floor to the mark.
Rider Inseam
Stand flat-footed. Place a book between your legs firm against your crotch — measure from floor to the top of the book spine.
Top Tube Length (ETT)
On the bike, measure horizontally from the center of the head tube to the center of the seat tube. This is the Effective Top Tube — used in all geometry charts.
Chainstay Length
Measure from the center of the bottom bracket to the center of the rear axle. Shorter = snappier gate starts; longer = more stability at speed.
BEFORE YOU ORDER
- Charts are a starting point — riding style, experience level, and discipline (SX vs. UCI) affect the ideal size.
- Growing riders: if between sizes, size up — stem length and seat height can compensate.
- Carbon frames have no flex-adjustment margin — correct sizing is more critical than with aluminum.
- Still unsure? Message us on WhatsApp — we'll help you find the right fit before you order.