General Discussion Triathlon Talk » Passing; IM&ITU 1.12mph (1.82kph) faster, USAT 0.99mph (1.6kph) faster Rss Feed  
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2015-02-17 12:28 PM

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Subject: Passing; IM&ITU 1.12mph (1.82kph) faster, USAT 0.99mph (1.6kph) faster

I always wondered what the speed specifics needed were for making passes within the allotted time, never gave it much thought just made sure I got past as quickly as possible without killing myself or waited for the right opportunity if I creeped up on someone . Found an online speed calculator and played with it for a bit.

IM & ITU 2015: If you are planning a 70.3 or 140.6 this year looks like you need to be going at least 1.12mph (1.8kph) faster than the bike in front of you to make up the 6 bike lengths or 10m (~33') pass within the allowed 20 sec.

USAT: "Drafting--keep at least three bike lengths of clear space between you and the cyclist in front.  If you move into the zone, you must pass within 15 seconds."  This works out to be 0.99mph (1.6kph) faster than the bike in front of you to make up the 4 bike lengths (~22' / 6.67m) within the 15 sec. 



2015-02-17 2:37 PM
in reply to: Donto

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Subject: RE: Passing; IM&ITU 1.12mph (1.82kph) faster, USAT 0.99mph (1.6kph) faster

Originally posted by Donto

I always wondered what the speed specifics needed were for making passes within the allotted time, never gave it much thought just made sure I got past as quickly as possible without killing myself or waited for the right opportunity if I creeped up on someone . Found an online speed calculator and played with it for a bit.

IM & ITU 2015: If you are planning a 70.3 or 140.6 this year looks like you need to be going at least 1.12mph (1.8kph) faster than the bike in front of you to make up the 6 bike lengths or 10m (~33') pass within the allowed 20 sec.

USAT: "Drafting--keep at least three bike lengths of clear space between you and the cyclist in front.  If you move into the zone, you must pass within 15 seconds."  This works out to be 0.99mph (1.6kph) faster than the bike in front of you to make up the 4 bike lengths (~22' / 6.67m) within the 15 sec. 

1.12mph is a decent amount faster. 

I doubt it'll be well-enforced throughout the field.

I like your graph

2015-02-17 2:58 PM
in reply to: Donto

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Subject: RE: Passing; IM&ITU 1.12mph (1.82kph) faster, USAT 0.99mph (1.6kph) faster

1.12 mph faster than anyone in the race? Sounds like a challenge.

2015-02-17 3:33 PM
in reply to: brigby1

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Subject: RE: Passing; IM&ITU 1.12mph (1.82kph) faster, USAT 0.99mph (1.6kph) faster
Now we will see Officials with radar guns and stop watches. This should be fun.
2015-02-17 4:03 PM
in reply to: 0

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Subject: RE: Passing; IM&ITU 1.12mph (1.82kph) faster, USAT 0.99mph (1.6kph) faster
Originally posted by Donto

I always wondered what the speed specifics needed were for making passes within the allotted time, never gave it much thought just made sure I got past as quickly as possible without killing myself or waited for the right opportunity if I creeped up on someone . Found an online speed calculator and played with it for a bit.

IM & ITU 2015: If you are planning a 70.3 or 140.6 this year looks like you need to be going at least 1.12mph (1.8kph) faster than the bike in front of you to make up the 6 bike lengths or 10m (~33') pass within the allowed 20 sec.

USAT: "Drafting--keep at least three bike lengths of clear space between you and the cyclist in front.  If you move into the zone, you must pass within 15 seconds."  This works out to be 0.99mph (1.6kph) faster than the bike in front of you to make up the 4 bike lengths (~22' / 6.67m) within the 15 sec. 




cool

it is "measured from the leading edge of the front wheel and extending towards the back of the bike (5 bike lengths of clear space between bikes)"

correct ?


Edited by marcag 2015-02-17 4:06 PM
2015-02-17 4:17 PM
in reply to: marcag

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Subject: RE: Passing; IM&ITU 1.12mph (1.82kph) faster, USAT 0.99mph (1.6kph) faster

Originally posted by marcag
Originally posted by Donto

I always wondered what the speed specifics needed were for making passes within the allotted time, never gave it much thought just made sure I got past as quickly as possible without killing myself or waited for the right opportunity if I creeped up on someone . Found an online speed calculator and played with it for a bit.

IM & ITU 2015: If you are planning a 70.3 or 140.6 this year looks like you need to be going at least 1.12mph (1.8kph) faster than the bike in front of you to make up the 6 bike lengths or 10m (~33') pass within the allowed 20 sec.

USAT: "Drafting--keep at least three bike lengths of clear space between you and the cyclist in front.  If you move into the zone, you must pass within 15 seconds."  This works out to be 0.99mph (1.6kph) faster than the bike in front of you to make up the 4 bike lengths (~22' / 6.67m) within the 15 sec. 

cool it is "measured from the leading edge of the front wheel and extending towards the back of the bike (5 bike lengths of clear space between bikes)" correct ?

Yes Marc that's correct. 10m from front of wheel to other front of wheel and about 5 bike lengths of clearance.

Interestingly the pro's only need to go 1.07mph (1.73kph) faster to cover their 12m (6 bike lengths of clear space) in 25 seconds!



2015-02-17 4:31 PM
in reply to: Donto

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Subject: RE: Passing; IM&ITU 1.12mph (1.82kph) faster, USAT 0.99mph (1.6kph) faster
Originally posted by Donto
interestingly the pro's only need to go 1.07mph (1.73kph) faster to cover their 12m (6 bike lengths of clear space) in 25 seconds!




except at the speed they are going 1.73kph faster is a bigger increment of watts than at our speed :-)
2015-02-17 4:38 PM
in reply to: marcag

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Subject: RE: Passing; IM&ITU 1.12mph (1.82kph) faster, USAT 0.99mph (1.6kph) faster

Originally posted by marcag
Originally posted by Donto interestingly the pro's only need to go 1.07mph (1.73kph) faster to cover their 12m (6 bike lengths of clear space) in 25 seconds!
except at the speed they are going 1.73kph faster is a bigger increment of watts than at our speed :-)
I KNEW you'd say that!!!

2015-02-17 4:53 PM
in reply to: marcag

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Subject: RE: Passing; IM&ITU 1.12mph (1.82kph) faster, USAT 0.99mph (1.6kph) faster

Originally posted by marcag
Originally posted by Donto interestingly the pro's only need to go 1.07mph (1.73kph) faster to cover their 12m (6 bike lengths of clear space) in 25 seconds!
except at the speed they are going 1.73kph faster is a bigger increment of watts than at our speed :-)

And what is more difficult for pros is that they must move to the left before entering that 12 meter buffer in order to make a pass.  Thus they are not allowed to take advantage of the slipstream as they get closer to the cyclist ahead of them.

(b) The age-group bicycle draftzone is 10 meters long, measured from the leading edge of the front wheel and extending towards the back of the bike (5 bike lengths of clear space between bikes). An age-group athlete may enter the draft zone of another athlete when passing and must continuously progress through the draftzone. A maximum of 20 seconds will be allowed to pass through the draft zone of another athlete; (5:00 Time Penalty)

(c) The professional bicycle draft zone is 12 meters long, measured from the leading edge of the front wheel and extending towards the back of the bike (6 bike lengths of clear space between bikes). A professional athlete must immediately move to the side upon entering the draft zone of another athlete when passing (i.e., no slipstreaming) and must continuously progress through the draft zone. A maximum of 25 seconds will be allowed to pass through the zone of another athlete; (5:00 Time Penalty)

I have not had much issue making legal passes within the time frame allowed because some of the extra energy I would need to speed up is also saved by entering the slipstream of the cyclist in front of me.  So increasing you speed by 1 or 1.1 mph isn't "that bad" when you consider the fact that you are already going some amount of speed faster than the cyclist in front of you if you want to pass them in the first place.

2015-02-18 11:14 AM
in reply to: Jason N

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Subject: RE: Passing; IM&ITU 1.12mph (1.82kph) faster, USAT 0.99mph (1.6kph) faster

I hate math, so my plan is to get out fast and stay in front for the entire race. 

2015-02-18 2:18 PM
in reply to: marcag

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Subject: RE: Passing; IM&ITU 1.12mph (1.82kph) faster, USAT 0.99mph (1.6kph) faster
Originally posted by marcag

Originally posted by Donto
interestingly the pro's only need to go 1.07mph (1.73kph) faster to cover their 12m (6 bike lengths of clear space) in 25 seconds!




except at the speed they are going 1.73kph faster is a bigger increment of watts than at our speed :-)


But the bigger incremental increase in power is still a smaller percentage increase at the pro's level (and neglecting the benefit of staying in the slipstream as much as possible during the pass for the non-pros, which likely nullifies the whole comparison).


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General Discussion Triathlon Talk » Passing; IM&ITU 1.12mph (1.82kph) faster, USAT 0.99mph (1.6kph) faster Rss Feed  
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