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PostPosted: Thu Jul 31, 2014 10:30 am 
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Joined: Sat May 12, 2012 8:32 am
Posts: 699
Location: Adelaide, Australia
Hi guys,

Giant don't publish any fork data appart from rake, which are (apparently) both the same at 45.

I was wondering if there would be any differences in fork length between these two forks?

I'm asking because I replaced a cracked defy fork with a TCR fork, and the steering is much twitcher. I was wondering if that's in the head or if there's actually a difference in the two forks that would cause this.

For reference, I replaced a Defy Advanced fork with a TCR Composite fork.

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Posted: Thu Jul 31, 2014 10:30 am 


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PostPosted: Thu Jul 31, 2014 10:37 am 
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Joined: Thu May 23, 2013 9:22 am
Posts: 292
Location: Warwick, UK
I can only assume here, but my defy advanced had more clearance than all my TCR's with regards to mudguards etc.

If the TCR fork is slightly shorter, it will have the effect of lowering the front end and effectivel steepening the head angle so may well be the reason why it feels twitchy..

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'16 Genesis Equilibrium - U6800 - FSA SRM - WH6800
'15 Canyon Speedmax CF 9.0 Pro - DA9070 - Rotor 3D+ P2Max - Zipp 900T/808T
'15 Cannondale Super Six Evo HM - DA9000- DA9000 SRM - CC40C
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PostPosted: Thu Jul 31, 2014 10:54 am 
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Joined: Sat May 12, 2012 8:32 am
Posts: 699
Location: Adelaide, Australia
Thanks for the reply stoo, does anyone have measurements to confirm this?

P.S. Nice stable of Giants :)

_________________
I write the weightweenies blog, hope you like it :)

My SwiftCarbon Ultravox

My Velocite Selene

Disclosure: I'm sponsored by Velocite, but I do give my honest opinion about them (I'm endorsed to race their bikes, not say nice things about them)


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PostPosted: Thu Jul 31, 2014 11:01 am 
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Joined: Thu May 23, 2013 9:22 am
Posts: 292
Location: Warwick, UK
Thanks buddy.

I don't have exact measurements, just assumptions.

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'16 Genesis Equilibrium - U6800 - FSA SRM - WH6800
'15 Canyon Speedmax CF 9.0 Pro - DA9070 - Rotor 3D+ P2Max - Zipp 900T/808T
'15 Cannondale Super Six Evo HM - DA9000- DA9000 SRM - CC40C
'13 Giant Trinity Composite - U6800 - QuarQ DZero


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PostPosted: Thu Aug 07, 2014 10:53 am 
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Joined: Sat May 12, 2012 8:32 am
Posts: 699
Location: Adelaide, Australia
Bump

to add to the list of observations it looks like toe overlap has increased - does this confirm that the forks are shorter?

_________________
I write the weightweenies blog, hope you like it :)

My SwiftCarbon Ultravox

My Velocite Selene

Disclosure: I'm sponsored by Velocite, but I do give my honest opinion about them (I'm endorsed to race their bikes, not say nice things about them)


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Posted: Thu Aug 07, 2014 10:53 am 


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PostPosted: Thu Aug 07, 2014 10:57 am 
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Joined: Thu May 23, 2013 9:22 am
Posts: 292
Location: Warwick, UK
Potentially yes, because the head tube would be lower and shortening the wheelbase, moving the wheel rearwards.

_________________
'16 Genesis Equilibrium - U6800 - FSA SRM - WH6800
'15 Canyon Speedmax CF 9.0 Pro - DA9070 - Rotor 3D+ P2Max - Zipp 900T/808T
'15 Cannondale Super Six Evo HM - DA9000- DA9000 SRM - CC40C
'13 Giant Trinity Composite - U6800 - QuarQ DZero


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