๐ŸŽ‚ Birthday Paradox ยท Sports
โ† All sports

Olympic Cycling Track (Cycling)

Delegation

286 team lists ยท 2,196 player entries ยท avg team size 7.7

Read this sport as a comparison between raw coincidence and what team size alone predicts. Here, the real rate is +2.6 points above the birthday-paradox baseline.

Real team lists
10.1%
teams with shared birthdays
Why it matters: This is the headline rate, but it should never be read without team size.
Expected from size
7.5%
from avg team size
Why it matters: This is the fair baseline: what same-size random teams would do.
Gap from expected
+2.6 points
real โˆ’ expected
Why it matters: Positive means the sport has more birthday matches than size alone predicts.
Team lists
286
teams analysed
Why it matters: Enough team lists for a useful sport-level read.
What to notice: The best question on a sport page is not "is the real rate high?" but "is it high after accounting for team size?" That is what the gap card is answering.

Country comparison

Countries with the most team lists for Olympic Cycling Track (Cycling), charted by the share of teams with at least one shared birthday.

What to compare: This view is best for spotting sample-shape differences inside a sport. Among the highest-sample countries, GBR has the highest observed rate, with an average team size of 9.3.

Gender split inside this sport

Real and expected rates for labelled team lists in this sport.

Why it matters: The gender gap is mostly a team-size story. Women have the larger average team size here (8.5 athletes), so their birthday-match rate naturally rises.

By country

Top 40 countries by team-list count.

CountryTeam listsAvg playersReal
GBR249.325.0%
FRA238.713.0%
USA218.00.0%
NED217.114.3%
ITA207.85.0%
DEN156.60.0%
AUS159.920.0%
GER148.921.4%
JPN106.50.0%
NZL109.320.0%
URS97.40.0%
BEL96.611.1%
ARG96.80.0%
TCH86.337.5%
SUI86.112.5%
ESP77.40.0%
COL75.90.0%
CAN67.00.0%
POL66.716.7%
GDR57.00.0%
FRG58.240.0%
RUS59.40.0%
UKR46.50.0%
KOR46.80.0%
CHN38.70.0%
CZE25.50.0%
MEX25.00.0%
AUT16.00.0%
BUL16.00.0%
CHI15.00.0%
EUN19.00.0%
HUN15.00.0%
FIN17.00.0%
LTU16.00.0%
LAT15.00.0%
ROC17.00.0%
RSA15.00.0%
TTO17.00.0%
SVK15.00.0%
URU15.00.0%
What to notice: Countries with larger average teams will naturally show more shared birthdays. The country list is most useful for finding which samples are driving this sport's overall rate.

By gender

Where the dataset records it.

GenderTeam listsRealExpectedGap
Women539.4%9.0%+0.4 points
Men23310.3%7.2%+3.1 points

Sample team lists

Largest teams in the dataset.

TeamSeasonPlayersRepeatsExpected chance
FRA Cycling Track (Cycling) (1900 Summer) ยท FRA1900 Summer26159.8%
AUS Cycling Track (Cycling) (2016 Summer) ยท AUS2016 Summer16128.4%
GER Cycling Track (Cycling) (2020 Summer) ยท GER2020 Summer15125.3%
GBR Cycling Track (Cycling) (2008 Summer) ยท GBR2008 Summer14122.3%
GBR Cycling Track (Cycling) (2016 Summer) ยท GBR2016 Summer14122.3%
GBR Cycling Track (Cycling) (2020 Summer) ยท GBR2020 Summer14122.3%
FRA Cycling Track (Cycling) (2000 Summer) ยท FRA2000 Summer13119.4%
AUS Cycling Track (Cycling) (2000 Summer) ยท AUS2000 Summer13219.4%
GER Cycling Track (Cycling) (2000 Summer) ยท GER2000 Summer12116.7%
GBR Cycling Track (Cycling) (2012 Summer) ยท GBR2012 Summer12116.7%
What to notice: The sample team lists show the mechanics: once the player count gets large, the expected chance climbs quickly, and each repeat is another player landing on a date already present.