ASTM Classification
Understanding wheel intended use according to ASTM International standards.
What is the ASTM Classification?
The ASTM F2043 classification is an international standard defining the intended use and operating conditions for bicycles and their components, established by ASTM International (an international standards organization that develops technical standards for materials, products, systems, and services).
How Does ASTM Classify Wheels?
ASTM classifies bicycle wheels into 5 distinct groups, numbered from 1 to 5. The higher the number, the more demanding and “extreme” the intended operating conditions are (ranging from Category 1 for pure road riding up to Category 5 for downhill racing).
How VINCI Applies ASTM Classification
To help our riders quickly understand the intended application of each model, we assign our wheelsets to specific ASTM categories. This allows for a quick, general assessment of what environment a given model is engineered for.
Important Note: This classification is general in nature and does not cover every single variable. Rider weight, tire width limits, and maximum operational pressure all play a critical role and, when properly matched, can enhance the utilization scope of a wheelset. Detailed parameters for all VINCI models can be found in our technical documentation section.
ASTM F2043 Wheel Categories Breakdown
Category 1: Road, Time Trial & Triathlon
Designed for riding on smooth, paved surfaces where the tires remain in constant contact with the ground.
VINCI Models: TORE, RAPID, and SENTIERO series (note: SENTIERO wheels can also be fully utilized under Category 2 as gravel wheels).
Category 2: Gravel & Cyclocross
Designed for conditions described in Category 1, extended to include riding on paved roads, gravel roads, and unpaved paths with relatively minor irregularities. Brief losses of contact with the ground and drops/jumps from heights of up to 15 cm (approx. 6 inches) are permitted.
VINCI Models: SENTIERO and GRV series.
Category 3: XC & XCM (Cross-Country & Mountain Bike Marathons)
Designed for conditions described in Categories 1 and 2, extended to include rough and challenging off-road terrain typical of XC and marathon routes, requiring proper technical skills from the rider. Jumps from heights of up to 61 cm (approx. 24 inches) are permitted, provided the rider possesses the necessary technical proficiency.
VINCI Models: 29″ MTB series – SCUDO and ARMA models.
Category 4: Enduro
Designed for conditions described in Categories 1, 2, and 3, extended to include drops up to 122 cm (approx. 4 feet) in height and speeds up to 40 km/h (25 mph) on technically demanding sections, subject to the same rider skill requirements as Category 3.
VINCI Models: VINCI currently does not offer wheels engineered for Enduro.
Category 5: Downhill & Freeride
Designed for conditions described in Categories 1 through 4, extended to include extreme drops (without height limits) and unrestricted speeds.
VINCI Models: VINCI currently does not offer wheels engineered for Downhill or Freeride.
Key Considerations
The classification above is a generalized framework. Specific route characteristics (such as race courses designed by event organizers) may combine elements of multiple categories or exceed a single category’s scope. Similarly, a versatile wheel model can successfully bridge multiple applications.
A prime example is our SENTIERO series: while acting as fully-fledged road wheels, their increased internal rim width and structural robustness make them exceptionally well-suited for dedicated gravel riding.
For official details regarding the ASTM F2043 standard, please visit the ASTM International website.