Crupi "OS20 Pro XXL" BMX Race Frame
- Weight : 1.4kg / 3.09lbs
- Packaging Unit: 1 Piece
- Product ID (PID): 45209
- Product safety
Weight
Source: BMX Glossary
Printed: 10/29/2026
The Crupi "OS20 Pro XXL" BMX Race Frame is the OS20 evolution of the Crupi Level. OS20 means the wheels have the 451mm rim diameter of 20 x 1-1/8" or 20 x 1-3/8" wheels but the width of pro rims. The bike stays a 20 inch bike but rolls on a larger diameter and feels a bit more stable. Like the Level it is built entirely in the USA from butted 6061-T6 aluminum.
The tapered integrated head tube (1-1/8" to 1.5") is CNC machined, and the square section down tube keeps the head tube and bottom bracket area stiff at a low weight. CNC machined dropouts, five cable guides and a Euro BSA bottom bracket shell with 68/73mm complete it. It uses a V-brake. In Pro XXL it has a 22" top tube and weighs 1.40kg according to US Pro.
Facts: Crupi "OS20 Pro XXL" BMX Race Frame
- Wheel Size: 20" (OS20) (OS20, 451mm)
- Race Size: Pro XXL
- Material: 6061-T6 aluminum, butted tubes
- Geometry:
- Top Tube Length (TT): 22"
- Chainstay Length (CS): 14.5"
- Head Tube Angle (HA): 74°
- Seat Tube Angle (SA): 72.5°
- Bottom Bracket Height: 11.38" - Headsets Size: Tapered 1-1/8" - 1.5" (integrated)
- Seat Post Diameter: 26.8mm
- Bottom Bracket: Euro BSA, 68/73mm
- Dropouts: CNC machined
- Brake Type: V-brake
- Brakemounts: V-brake posts (according to Crupi on all Crupi frames)
- Features: OS20 wheel size (451mm), made in USA, CNC machined integrated head tube, square section down tube, CNC machined dropouts, 5 cable guides
- Includes: 1 frame












