# C3 (classification)
**C3** is a sport class in para-cycling for athletes with a physical impairment who ride a conventional bicycle and whose activity limitation is of intermediate severity within the C division. The C division runs from C1 to C5, with a lower number indicating a higher level of impairment, so C3 sits in the middle of the five bicycle classes.[1](https://www.uci.org/article/para-cycling-classification-explanations-information-and-education/57TBuVG1kH2b3fdcEg29KT)
| Key fact | Detail |
|---|---|
| Division | C (cycle): athletes with a physical impairment who ride a conventional bicycle, with adaptations such as modified cranks or prosthetic attachments where needed[1](https://www.uci.org/article/para-cycling-classification-explanations-information-and-education/57TBuVG1kH2b3fdcEg29KT) • [2](https://www.uci.org/article/para-cycling-road-a-brief-history-and-explainer/1zMEDQDpNuzp8TvO9Pjkc2) |
| Position in scale | One of five classes, C1–C5; C1 is the most severe activity limitation and C5 the least, so C3 is the median class[1](https://www.uci.org/article/para-cycling-classification-explanations-information-and-education/57TBuVG1kH2b3fdcEg29KT) • [3](https://www.paralympic.org/news/sport-week-classification-cycling) |
| Typical profiles | Cyclists with a double below-the-knee amputation who use a prosthesis are likely to compete in C3; a below-knee amputation with a prosthesis on one leg would usually be C4[3](https://www.paralympic.org/news/sport-week-classification-cycling) |
| Impairment scope | Riders with impairments in one to two limbs; class profiles include amputations, impaired muscle power or range of motion, and co-ordination impairments such as ataxia and athetosis[4](https://www.paralympic.org.au/wp-content/uploads/2021/11/PA_Para_Cycling_Information_Sheet_FINAL_Nov_21.pdf) • [3](https://www.paralympic.org/news/sport-week-classification-cycling) |
| Events | Road races and individual time trials at the UCI Para-cycling Road World Championships, World Cup rounds, and Paralympic Games; C-class riders also contest track events[2](https://www.uci.org/article/para-cycling-road-a-brief-history-and-explainer/1zMEDQDpNuzp8TvO9Pjkc2) |
| Evidence on fairness | Men's bicycling velocity differs between all adjacent classes (Cohen d = 0.14–0.73), including C3 versus C4; for women the C3–C4 difference is d = 0.48[5](https://pubmed.ncbi.nlm.nih.gov/34121066/) |
## Where C3 sits in the system
Para-cycling groups athletes into four sport divisions named for the equipment used: C (cycle, a conventional bike with adaptations if necessary), T (tricycle), B (tandem for visually impaired athletes with a sighted pilot), and H (handcycle). The C, T, and H divisions are subdivided into numbered sport classes, C1–5, T1–2, and H1–5, and in every case a lower number indicates a higher level of impairment.[1](https://www.uci.org/article/para-cycling-classification-explanations-information-and-education/57TBuVG1kH2b3fdcEg29KT) Across the whole discipline, cyclists are divided into thirteen impairment classes based on functionality.[3](https://www.paralympic.org/news/sport-week-classification-cycling)
The C classes are for athletes able to use a standard bicycle. Their profiles cover amputations, impaired muscle power or passive range of movement, and impairments affecting co-ordination such as ataxia and athetosis. C1 is allocated to athletes with the most severe activity limitation and C5 to athletes who meet only the minimum impairment criteria; C3 therefore gathers riders whose functional loss is substantial but not at either extreme.[3](https://www.paralympic.org/news/sport-week-classification-cycling) An Australian Paralympic committee guide describes C3 riders as those with impairments in one to two limbs.[4](https://www.paralympic.org.au/wp-content/uploads/2021/11/PA_Para_Cycling_Information_Sheet_FINAL_Nov_21.pdf) The class boundary with C4 is illustrated by amputation level: a cyclist with a double below-the-knee amputation who uses a prosthesis is likely to be classified C3, while an athlete with a below-knee amputation and a prosthesis on one leg would compete in C4.[3](https://www.paralympic.org/news/sport-week-classification-cycling)
## How classification works
Allocation of a sport class rests on medical information supplied by the athlete and an evaluation by a classification panel. In international para-cycling each athlete is assessed by a panel comprising a Medical Classifier, a trained health care professional such as a doctor or physiotherapist, and a Technical Classifier with a working knowledge of cycling who evaluates how the impairment affects performance on the bike. Athletes submit medical documentation such as MRIs, neurological reports, or nerve conduction studies beforehand; the technical assessment may include observing mounts, riding, or simulated standing starts, and there is often an observation period during competition before the panel makes its final decision.[1](https://www.uci.org/article/para-cycling-classification-explanations-information-and-education/57TBuVG1kH2b3fdcEg29KT)
The system is required to follow the [International Paralympic Committee](https://www.edgepedia.org/international-paralympic-committee) (IPC) Classification Code, which came into effect in 2007, was revised in 2015, and has now undergone a fresh review producing a version that took effect in 2025; whenever the code changes this way, the para-cycling classification system must be checked to confirm it meets the new requirements. The UCI describes the approach as having moved from a purely medical evaluation to one combining medical and technical assessments that group athletes with similar activity limitations.[1](https://www.uci.org/article/para-cycling-classification-explanations-information-and-education/57TBuVG1kH2b3fdcEg29KT) The UCI may also re-assign an athlete whose sport class status is Confirmed back to Review or Fixed Review Date status and require a new evaluation session, a mechanism used, for example, in the 2026 revision of H3 criteria.[6](https://assets.ctfassets.net/761l7gh5x5an/2punQJAox1L2a5uruUMYbj/db0cd9c44097562e406e56fd75cbb448/H3_Regulation_Change_Explanatory_Document.pdf)
## Performance evidence and class boundaries
Research on race results tests whether each class boundary corresponds to a real performance gap. Analyzing UCI road race competitions held from 2011 through 2019, the study showed that cycling speed differed significantly for every neighboring pair of men's classes, with [Cohen's d](https://www.edgepedia.org/cohens-d) values ranging from 0.14 to 0.73; among women, only the C1 versus C2 (d = 1.15) and the C3 versus C4 (d = 0.48) comparisons reached significance.[5](https://pubmed.ncbi.nlm.nih.gov/34121066/) Cohen's d measures the size of a difference between groups in standard-deviation units, so values in this range indicate gaps from small to moderate.
Other work points to boundaries that may need adjustment. An analysis of international-level C-division para-cyclists found closer performance levels between C3, C4, and C5 in the track 1 km and 500 m time trials than between the lower classes, and suggested that re-evaluating sport-class combinations may be warranted; the same study found differences in pacing profiles between the C1, C2, and C3 classes in road time trials.[7](https://pmc.ncbi.nlm.nih.gov/articles/PMC11982516/) Earlier work on the London 2012 Paralympic road time trial showed that C2 split times differed from C1 and C3, with C2 showing a slower start, a flatter pacing profile, and faster split times late in the race.[8](https://www.tandfonline.com/doi/full/10.1080/09638288.2020.1734106) A review of the classification system noted that the five-class C structure is mostly based on expert opinion rather than scientific evidence, which is why systematic comparisons across international events have been called for.[8](https://www.tandfonline.com/doi/full/10.1080/09638288.2020.1734106)
## Context and governance
Para cycling made its Paralympic debut in 1984 and has been officially administered by the UCI since 2007.[2](https://www.uci.org/article/para-cycling-road-a-brief-history-and-explainer/1zMEDQDpNuzp8TvO9Pjkc2) C-class riders contest road races and individual time trials at the UCI Para-cycling Road World Championships and World Cup rounds, and track events on the velodrome; in the track team sprint, squads are built from riders across the C5 to C1 classes.[2](https://www.uci.org/article/para-cycling-road-a-brief-history-and-explainer/1zMEDQDpNuzp8TvO9Pjkc2) • [9](https://assets.auscycling.org.au/s3fs-public/2023-10/2024-para-cycling-technical-regulations.pdf?VersionId=3PuQEd5Y4kMsvg9mUiYimbCgcfyGuO5V)
To strengthen the evidence base, the UCI, in collaboration with VU Amsterdam, launched a four-year research project in September 2024 aimed at further strengthening the evidence-based classification system in para cycling.[6](https://assets.ctfassets.net/761l7gh5x5an/2punQJAox1L2a5uruUMYbj/db0cd9c44097562e406e56fd75cbb448/H3_Regulation_Change_Explanatory_Document.pdf)
## References
1. [Para-cycling Classification: explanations, information and education, UCI](https://www.uci.org/article/para-cycling-classification-explanations-information-and-education/57TBuVG1kH2b3fdcEg29KT)
2. [Para cycling road: a brief history and explainer, UCI](https://www.uci.org/article/para-cycling-road-a-brief-history-and-explainer/1zMEDQDpNuzp8TvO9Pjkc2)
3. [Sport week: Classification in cycling, International Paralympic Committee](https://www.paralympic.org/news/sport-week-classification-cycling)
4. [Para-Cycling Information Sheet, Paralympics Australia](https://www.paralympic.org.au/wp-content/uploads/2021/11/PA_Para_Cycling_Information_Sheet_FINAL_Nov_21.pdf)
5. [Bicycling and Tricycling Road Race Performance in International Para-Cycling Events Between 2011 and 2019, PubMed](https://pubmed.ncbi.nlm.nih.gov/34121066/)
6. [H3 Regulation Change Explanatory Document, UCI](https://assets.ctfassets.net/761l7gh5x5an/2punQJAox1L2a5uruUMYbj/db0cd9c44097562e406e56fd75cbb448/H3_Regulation_Change_Explanatory_Document.pdf)
7. [From Sprint to Endurance: Performance Level and Pacing Profile of International Level Para-Cyclists From C Division, PMC](https://pmc.ncbi.nlm.nih.gov/articles/PMC11982516/)
8. [Para-cycling race performance in different sport classes, Disability and Rehabilitation](https://www.tandfonline.com/doi/full/10.1080/09638288.2020.1734106)
9. [2024 Para-Cycling Technical Regulations, AusCycling](https://assets.auscycling.org.au/s3fs-public/2023-10/2024-para-cycling-technical-regulations.pdf?VersionId=3PuQEd5Y4kMsvg9mUiYimbCgcfyGuO5V)
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*Topic: Encyclopedia › Sports, games, and recreation › Olympics and multisport subjects › General sport and multisport institutions › Paralympic movement › Paralympic classification and sport categories › Classification by Paralympic sport › Cycling classification (Paralympic)*
*Initially written Sep 17, 2026 · Reviewed: Sep 17, 2026; Sep 30, 2026; Oct 21, 2026 · Edited: Sep 30, 2026; Oct 21, 2026 · Last review: Oct 21, 2026*
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