Any Fork length differences in Giant TCR and Defy forks?

Discuss light weight issues concerning road bikes & parts.
Post Reply
istigatrice
Posts: 756
Joined: Sat May 12, 2012 8:32 am
Location: Adelaide, Australia

by istigatrice

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.
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)

by Weenie


Stoo
Posts: 318
Joined: Thu May 23, 2013 9:22 am
Location: Warwick, UK

by Stoo

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..
'17 Giant Trinity Pro TT - DA9070 - Rotor 3D+ P2Max - Zipp 900T/HED Jet 9+
'16 Genesis Equilibrium - U6800 - FSA SRM - WH6800
'15 Cannondale Super Six Evo HM - DA9000- DA9000 SRM - CC40C
'13 Giant Trinity Composite - U6800 - QuarQ DZero

istigatrice
Posts: 756
Joined: Sat May 12, 2012 8:32 am
Location: Adelaide, Australia

by istigatrice

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)

Stoo
Posts: 318
Joined: Thu May 23, 2013 9:22 am
Location: Warwick, UK

by Stoo

Thanks buddy.

I don't have exact measurements, just assumptions.
'17 Giant Trinity Pro TT - DA9070 - Rotor 3D+ P2Max - Zipp 900T/HED Jet 9+
'16 Genesis Equilibrium - U6800 - FSA SRM - WH6800
'15 Cannondale Super Six Evo HM - DA9000- DA9000 SRM - CC40C
'13 Giant Trinity Composite - U6800 - QuarQ DZero

istigatrice
Posts: 756
Joined: Sat May 12, 2012 8:32 am
Location: Adelaide, Australia

by istigatrice

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)

Stoo
Posts: 318
Joined: Thu May 23, 2013 9:22 am
Location: Warwick, UK

by Stoo

Potentially yes, because the head tube would be lower and shortening the wheelbase, moving the wheel rearwards.
'17 Giant Trinity Pro TT - DA9070 - Rotor 3D+ P2Max - Zipp 900T/HED Jet 9+
'16 Genesis Equilibrium - U6800 - FSA SRM - WH6800
'15 Cannondale Super Six Evo HM - DA9000- DA9000 SRM - CC40C
'13 Giant Trinity Composite - U6800 - QuarQ DZero

by Weenie


Post Reply
  • Similar Topics
    Replies
    Views
    Last post