School Sport SAcycling time trial championship including students with disabilities

Dates and venue

Wednesday 14 March

Adelaide International Raceway

Corner Browns Road and Pt Wakefield Road.

Nominations close Friday 2 March

Championship details

Competitor information

A time trial is a race where the cyclist rides alone over a set 7.35km course in an attempt to set the fastest time. Cyclists are started at 30 second or one minute intervals. This event is also a qualifying event for the two day cycling tour for secondary students.

Entry fee

$5.50 inc GST per student.

No payment is required on the day. A tax invoice will be sent to schools after the event.

Categories and age groups

The age of the competitor shall be calculated as 31 December in the year of competition.

For example a student turning 15 years of age in 2018 must compete in the under 17 age group.

Secondary school students can compete in the state championships or the come and try category in the under 19, under 17 or under 15 age groups.

The come and try category will also have a year 6 and 7 age groups for students to compete in.

Junior gear restrictions

Junior gear restrictions apply to all students entering the state championship category. Please see the next page for more details. Rollouts will be done on the day. Gear restrictions will not apply to students in the come and try categories.

Venue and start time

The venue for the time trial is the Adelaide International Raceway (AIR) corner of Browns Road and Port Wakefield Road Virginia. Directions to AIR are to take Port Wakefield Road, drive past the AIR and take the next left (Ryan Road), take the next left (Supple Road) and take the next left (Brown Road).

Registration is from 10.00am to 10.30am with racing to commence at 11.00am. The approximate finish time is 2.00pm.

Further information

For more information on the cycling time trial championships, please contact the School Sport Team on 8416 5900 or email

Junior gear restrictions

In the schools championship as in junior cycling, gear restrictions are in force. This serves two purposes, one is to help protect growing joints from the excess forces that can be applied using too big a gears, the other is to try to keep the competition fairer considering the different strength and size of growing children.

Cyclists entering the state championship must adhere to this for the time trial. Roll outs will be done on the day.

All cyclists must adhere to the Cycling Australia policy regarding gear limitations for the cycling tour. All cyclists will complete a rollout at the start of the tour and random checks will be done through the tour.

What are they?

Gear restrictions (or “rollout”) apply to all junior (U19 and below) age groups. The gear restrictions limit the rollout, - i.e. the maximum distance a bicycle can travel with one full revolution of the pedals.

How do I measure rollout?

On a smooth surface, lay a tape measure (6m +) on the ground, and roll the bike backwards along it until the pedals have made one complete turn. Make sure you start with the pedals exactly in the vertical position. Try it with different gears to see the difference.

Who says?

Cycling Australia specifies the rollout distances for each age group in its regulations and mandates the restrictions be in place for all junior age-group races.

Which gear combinations give the junior rollouts?

This is the $64 question which cannot be answered precisely. Junior riders should be able to tell you why from their maths classes. The rollout is a mathematical relationship between the relative size of the chain wheel (front) and cogs (rear), and the circumference of the wheel. While the relative size of the front and rear gears is reasonably fixed for given numbers of teeth, the circumference of wheels is surprisingly different and is largely dependent not only on the size of the wheel (e.g. 700C for most road bikes, 650C for junior and triathlon/ time-trial bikes) but also the tyre that is fitted. For instance, a 23mm width tyre has a higher profile (and therefore greater circumference) than a 20mm tyre. But tyres by different manufacturers, even though they are for the same size wheel (e.g. 700C) will have different profiles (and circumferences). Therefore, the only accurate way of measuring this is to roll the bike out along a tape measure. However, as an indication only, we have provided below a chart showing common combinations that will get you pretty close to the correct junior rollouts. You must however check by measurement whether your tyre/wheel combination actually produces the result shown.For Junior

Age Group / U15 / U17 / U19
Rollout (m) / 6.00 / 7.00 / 7.93
Chainwheel
(no. teeth) / Rear Cog
(no. teeth) / Rear Cog
(no. teeth) / Rear Cog
(no. teeth)
36 / 15,13 / 11 / 11
39 / 14,15 / 12 / 11
42 / 15,16 / 13 / 12
44 / 16 / 14 / 12,13
48 / 18 / 15 / 14
50 / 18 / 15, 16 / 14
52 / NA / 16 / 15
53 / NA / 16, 17 / 15

Note: Where two rear cog sizes are given, the smaller one is very close to the limit and may breach the rollout with certain tyres. In any event, always measure the bike for rollout to ensure compliance. The above combinations based on 700C wheel with a 23mm tyre. This information is from the Carnegie Caufield Cycling Club junior development site.

If the combinations shown in the table go slightly over the rollout limit, try lower profile (i.e. thinner) tyres. For example, the difference between a 23mm tyre and a 20mm tyre on a 44x17 combination can be 6cm!

If you have different wheel or tyre sizes, Cycling Australia have a very useful dynamic calculator where you can enter the diameter of your wheel/tyre combination and it will calculate the rollout. It is suggest you check this anyway.

School Sport SA cycling time trial championship including students with disabilities

State championship nomination form

School:
Sports Coordinator: / Mobile:

I declare that by completing this form that all students have approval from the Principal to compete at this event under the duty care of the school. Permission has also been granted the School Sport Team to use all students’ name, school, photographs, video and/or audio recordings in printed publications, on the website and on social media accounts. Students without permission must be identified to the event convenor prior to the start of the event.

Under 19 (cannot turn 19 in 2018)
Name / Gender / Parent mobile / Date of birth / Registered cyclist
M F
M F
M F
M F
M F
Under 17 (cannot turn 17 in 2018)
Name / Gender / Parent mobile / Date of birth / Registered cyclist
M F
M F
M F
M F
M F
Under 15 (cannot turn 15 in 2018)
Name / Gender / Parent mobile / Date of birth / Registered cyclist
M F
M F
M F
M F
M F

Return form to School Sport SA by Friday 2 March.

Email: x: 8354 2325

The information collected by Secondary School Sport SA is for the purpose of facilitating the participation of students in its events. The information provided will not be used or disclosed for any other purpose and will be held securely and protected against unauthorised access to the extent that is reasonably within our control. The information provided will only be used by staff on a “needs to know” basis and the privacy of the individuals whose information is provided will be respected and will not knowingly be used for any other purpose. Upon entry, you are giving the School Sport Unit permission to take photographs and use them for School Sport Promotional and Media material, unless a written request is submitted to the School Sport Unit.

School Sport SA cycling time trial championship including students with disabilities

Come ‘n’ try nomination form

School:
Sports Coordinator: / Mobile:

I declare that by completing this form that all students have approval from the Principal to compete at this event under the duty care of the school. Permission has also been granted the School Sport Team to use all students’ name, school, photographs, video and/or audio recordings in printed publications, on the website and on social media accounts. Students without permission must be identified to the event convenor prior to the start of the event.

Under 19 (cannot turn 19 in 2018)
Name / Gender / Parent mobile / Date of birth
M F
M F
M F
M F
Under 17 (cannot turn 17 in 2018)
Name / Gender / Parent mobile / Date of birth
M F
M F
M F
M F
Under 15 (cannot turn 15 in 2018)
Name / Gender / Parent mobile / Date of birth
M F
M F
M F
M F
Year 6 or 7 students
Name / Gender / Parent mobile / Date of birth
M F
M F
M F
M F

Return form to School Sport SA by Friday 2 March.

Email: x: 8354 2325

The information collected by Secondary School Sport SA is for the purpose of facilitating the participation of students in its events. The information provided will not be used or disclosed for any other purpose and will be held securely and protected against unauthorised access to the extent that is reasonably within our control. The information provided will only be used by staff on a “needs to know” basis and the privacy of the individuals whose information is provided will be respected and will not knowingly be used for any other purpose. Upon entry, you are giving the School Sport Unit permission to take photographs and use them for School Sport Promotional and Media material, unless a written request is submitted to the School Sport Unit.

School Sport SA cycling time trial championship including students with disabilities

Students with disabilities nomination form

School:
Sports Coordinator: / Mobile:

I declare that by completing this form that all students have approval from the Principal to compete at this event under the duty care of the school. Permission has also been granted the School Sport Team to use all students’ name, school, photographs, video and/or audio recordings in printed publications, on the website and on social media accounts. Students without permission must be identified to the event convenor prior to the start of the event.

Under 19 (cannot turn 19 in 2018)
Name / Gender / Parent mobile / Date of birth
M F
M F
M F
M F
Under 17 (cannot turn 17 in 2018)
Name / Gender / Parent mobile / Date of birth
M F
M F
M F
M F
Under 15 (cannot turn 15 in 2018)
Name / Gender / Parent mobile / Date of birth
M F
M F
M F
M F
Year 6 or 7 students
Name / Gender / Parent mobile / Date of birth
M F
M F
M F
M F

Return form to School Sport SA by Friday 2 March.

Email: x: 8354 2325

The information collected by Secondary School Sport SA is for the purpose of facilitating the participation of students in its events. The information provided will not be used or disclosed for any other purpose and will be held securely and protected against unauthorised access to the extent that is reasonably within our control. The information provided will only be used by staff on a “needs to know” basis and the privacy of the individuals whose information is provided will be respected and will not knowingly be used for any other purpose. Upon entry, you are giving the School Sport Unit permission to take photographs and use them for School Sport Promotional and Media material, unless a written request is submitted to the School Sport Unit.