Giant OverDrive vs. OverDrive 2 fork/head tube sizing for RO

Discuss light weight issues concerning road bikes & parts.
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efeballi
Posts: 485
Joined: Tue Dec 17, 2013 2:50 pm
Location: Body in Milano, mind in Istanbul

by efeballi

Hello all,
I'm contemplating a fork change for my Giant Propel Advanced, which has an OverDrive fork.
The rep at Giant says that an OD2 fork won't fit, because the headtubes are different between Advanced and Advanced Pro/SL models. Is that really the case? Can I fit a OD2 fork into my bike with a different headset?


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Last edited by efeballi on Mon Feb 01, 2016 10:19 am, edited 1 time in total.
SHUT UP LEGS
2015 Giant Propel Advanced
2015 Cannondale Supersix Evo
2013 KTM Strada mod. (totaled)
2011 Pinarello Dogma 60.1(loaner)
2011 Scott SUB 45(sold)

Politecnico di Milano Ingegneria Meccanica

by Weenie


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kkibbler
Posts: 869
Joined: Tue Sep 09, 2014 9:30 am

by kkibbler

OD is 1-1/8" top 1-1/4" bottom. OD2 and 1-1/4" top 1-1/2" bottom.

http://www.giant-bicycles.com/en-us/tec ... rdrive/50/

efeballi
Posts: 485
Joined: Tue Dec 17, 2013 2:50 pm
Location: Body in Milano, mind in Istanbul

by efeballi

So, will it fit?


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SHUT UP LEGS
2015 Giant Propel Advanced
2015 Cannondale Supersix Evo
2013 KTM Strada mod. (totaled)
2011 Pinarello Dogma 60.1(loaner)
2011 Scott SUB 45(sold)

Politecnico di Milano Ingegneria Meccanica

mariovalentim
Posts: 226
Joined: Fri Aug 28, 2015 2:03 am

by mariovalentim

1 1/4 > 1 1/8 so no.

peted76
Posts: 346
Joined: Mon Jun 23, 2014 10:30 pm

by peted76

On this topic, does anyone know where I can get an aftermarket 'overdrive' headset bottom bearing?
Local shops says that OEM ones aren't available (UK) and I have to buy a new headset full at £35. Which seems a little steep to me.
I've looked online but I can't ssem to find one with the little 45degree schamfer.

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jekyll man
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by jekyll man

Official cafe stop tester

efeballi
Posts: 485
Joined: Tue Dec 17, 2013 2:50 pm
Location: Body in Milano, mind in Istanbul

by efeballi

I have removed the fork and took some measurements of the bearing seats.
Upper bearing seat OD: 42 mm, ID: 36,3 mm
Lower bearing seat OD: 46.9 mm, ID: 43 mm. The measurement that I find to be the most critical, which is the upper seat ID and the smallest diameter in the head tube, is larger than 1 1/4", tells me that an OverDrive 2 fork will at least go through.
The OD measurements also match the bearing sizes listed in the link jekyll man posted, reinforcing my guess that Propel Adv/Adv Pro have the same head tube dimensions.
The plot thickens...


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SHUT UP LEGS
2015 Giant Propel Advanced
2015 Cannondale Supersix Evo
2013 KTM Strada mod. (totaled)
2011 Pinarello Dogma 60.1(loaner)
2011 Scott SUB 45(sold)

Politecnico di Milano Ingegneria Meccanica

istigatrice
Posts: 822
Joined: Sat May 12, 2012 8:32 am
Location: Australia

by istigatrice

I swear I read something on another website about the forks being interchangeable, provided you use the correct headset.

If the OD measurements match on the Adv and Adv/Pro I'd be inclined to believe if you got the Adv/Pro headset and fork they will fit on your Adv. frame.
I write the weightweenies blog, hope you like it :)

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)

garlet
Posts: 36
Joined: Thu Jan 07, 2016 1:47 pm

by garlet

1 1/4 ,1 1/8

fEichert
Posts: 16
Joined: Tue May 26, 2015 6:27 am

by fEichert

I have a TCR advanced sl with OD 2 and an old one with OD 1. I can switch forks without problems. The only thing I need to do is change the upper bearing of the headset.

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by Weenie


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