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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: 413
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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PostPosted: Thu Jul 31, 2014 10:37 am 
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Joined: Thu May 23, 2013 9:22 am
Posts: 167
Location: Northampton, 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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2013 Giant TCR Advanced 2 - Ultegra 6700 - Stans Alpha ZTR 400 - PT G3
2013 Giant TCR Advanced SL ISP - DA 7900 - Zipp 303 FC - PT G3
2011 Giant Trinity - Ultegra 6700 - Zipp 303 FC - PT G3/Disc
2012 PX Exocet 2 - SRAM Force - PX 101/82mm - PM TBC


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Posted: Thu Jul 31, 2014 10:37 am 


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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: 413
Location: Adelaide, Australia
Thanks for the reply stoo, does anyone have measurements to confirm this?

P.S. Nice stable of Giants :)

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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: 167
Location: Northampton, UK
Thanks buddy.

I don't have exact measurements, just assumptions.

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2013 Giant TCR Advanced 2 - Ultegra 6700 - Stans Alpha ZTR 400 - PT G3
2013 Giant TCR Advanced SL ISP - DA 7900 - Zipp 303 FC - PT G3
2011 Giant Trinity - Ultegra 6700 - Zipp 303 FC - PT G3/Disc
2012 PX Exocet 2 - SRAM Force - PX 101/82mm - PM TBC


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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: 413
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?

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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: 167
Location: Northampton, UK
Potentially yes, because the head tube would be lower and shortening the wheelbase, moving the wheel rearwards.

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2013 Giant TCR Advanced 2 - Ultegra 6700 - Stans Alpha ZTR 400 - PT G3
2013 Giant TCR Advanced SL ISP - DA 7900 - Zipp 303 FC - PT G3
2011 Giant Trinity - Ultegra 6700 - Zipp 303 FC - PT G3/Disc
2012 PX Exocet 2 - SRAM Force - PX 101/82mm - PM TBC


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