Tech Question

Where speeds may exceed 60 kmph

Tech Question

Postby JB » Tue Mar 06, 2012 12:18 pm

Hi,
what combination of rear cog and chain ring does the best for a 5.5 metre rollout (U13)? (I need to place an order for sons Track bike).

cheers, :)
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by BNA » Tue Mar 06, 2012 12:22 pm

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Re: Tech Question

Postby bigfriendlyvegan » Tue Mar 06, 2012 12:22 pm

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Re: Tech Question

Postby JB » Tue Mar 06, 2012 12:53 pm

cool - thanks for that. :)
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Re: Tech Question

Postby brentono » Wed Mar 07, 2012 4:40 pm

Think 49x19 is close.
:mrgreen:

A great training gear for men and boys. :)
Lone Rider- I rode on the long, dark road... before I danced under the lights.
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Re: Tech Question - Rollout U13

Postby JB » Thu Mar 08, 2012 10:55 am

Since learnt that for a 5.5 roll-out Cycling Australia specifies sprocket 18 and Chain Ring 45

http://www.cycling.org.au/?Page=9497

Cheers
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Re: Tech Question

Postby brentono » Sat Mar 10, 2012 10:54 am

Many Clubs quote 42x16 for their U13 rollout (>5.5) :roll:
:mrgreen:
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Re: Tech Question

Postby JB » Sat Mar 10, 2012 12:07 pm

brentono wrote:Many Clubs quote 42x16 for their U13 rollout (>5.5) :roll:
:mrgreen:


they risk getting caught when roll-outs are checked at race time...not worth it.
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Re: Tech Question

Postby brawlo » Sat Mar 10, 2012 6:32 pm

Nothing worse for your little one than to have their moment of glory taken away from them!
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Re: Tech Question

Postby brentono » Sun Mar 11, 2012 3:17 pm

Nothing worse than taking the little man out, and not being able to give him a run. :)
:mrgreen:
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Re: Tech Question

Postby bigfriendlyvegan » Mon Mar 12, 2012 10:07 am

brentono wrote:Nothing worse than taking the little man out, and not being able to give him a run. :)


And it's even worse when your son can't race (boom, tish) :D

I was going to go with - "That's what she said", but think it's a bit overused.
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Re: Tech Question

Postby scotto » Mon Mar 12, 2012 1:43 pm

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Re: Tech Question

Postby bp2 » Sat Mar 31, 2012 12:32 am

with 700c x 23 rear wheel,
or height of wheel at 674mm
49 x 19 = 5.46m
45 x 18 = 5.29m
42 x 16 = 5.55m
44 x 17 = 5.48m
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