Discuss light weight issues concerning road bikes & parts.
Moderator: robbosmans
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tomee
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by tomee on Mon Dec 30, 2019 5:17 am
anyone here fitted 160mm front disc rotors to a Giant Propel?
They are fitted with 140mm front and rear from factory and Giant made it have a propietry mount for the front fork.
wondering if i could just swap it out with a Shimano convertor?

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jlok
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by jlok on Mon Dec 30, 2019 9:39 am
Yes, you can. Done that before.
Rikulau V9 DB Custom < BMC TM02 < Litespeed T1sl Disc < Giant Propel Advanced SL Disc 1 < Propel Adv < TCR Adv SL Disc < KTM Revelator Sky < CAAD 12 Disc < Domane S Disc < Alize < CAAD 10
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tomee
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by tomee on Mon Dec 30, 2019 11:22 am
jlok wrote: ↑Mon Dec 30, 2019 9:39 am
Yes, you can. Done that before.
would i remove the propietry giant mount and replace it with the Shimano mount, or can i pop the shimano adapter on top of it?
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ruklaw
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by ruklaw on Mon Dec 30, 2019 11:43 am
I'd try rotating the mount you have first (unscrew the mount, unscrew the caliper from the mount, rotate the mount 180 degrees and screw the caliper back onto it, screw it onto the frame).
If it's possible to use the shimano mount it's hard to imagine how the Giant one could work but not accomodate the same rotation that the shimano one does.
Just in case you aren't aware, with the standard shimano front flat mount, one way up is for 140mm rotors, the other way up is for 160mm.
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jlok
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by jlok on Mon Dec 30, 2019 6:06 pm
tomee wrote: ↑Mon Dec 30, 2019 11:22 am
jlok wrote: ↑Mon Dec 30, 2019 9:39 am
Yes, you can. Done that before.
would i remove the propietry giant mount and replace it with the Shimano mount, or can i pop the shimano adapter on top of it?
You need to replace the Giant brake mount with the Shimano mount.
Rikulau V9 DB Custom < BMC TM02 < Litespeed T1sl Disc < Giant Propel Advanced SL Disc 1 < Propel Adv < TCR Adv SL Disc < KTM Revelator Sky < CAAD 12 Disc < Domane S Disc < Alize < CAAD 10
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jlok
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by jlok on Mon Dec 30, 2019 6:08 pm
ruklaw wrote: ↑Mon Dec 30, 2019 11:43 am
I'd try rotating the mount you have first (unscrew the mount, unscrew the caliper from the mount, rotate the mount 180 degrees and screw the caliper back onto it, screw it onto the frame).
If it's possible to use the shimano mount it's hard to imagine how the Giant one could work but not accomodate the same rotation that the shimano one does.
Just in case you aren't aware, with the standard shimano front flat mount, one way up is for 140mm rotors, the other way up is for 160mm.
Maybe you could take a closer look before advising rotation of the mount... the Giant mount is actually flush with the fork. You won't want to do it unless you want a funny looking protrusion of the mount.
Rikulau V9 DB Custom < BMC TM02 < Litespeed T1sl Disc < Giant Propel Advanced SL Disc 1 < Propel Adv < TCR Adv SL Disc < KTM Revelator Sky < CAAD 12 Disc < Domane S Disc < Alize < CAAD 10
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ruklaw
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by ruklaw on Mon Dec 30, 2019 8:53 pm
jlok wrote: ↑Mon Dec 30, 2019 6:08 pm
ruklaw wrote: ↑Mon Dec 30, 2019 11:43 am
I'd try rotating the mount you have first (unscrew the mount, unscrew the caliper from the mount, rotate the mount 180 degrees and screw the caliper back onto it, screw it onto the frame).
If it's possible to use the shimano mount it's hard to imagine how the Giant one could work but not accomodate the same rotation that the shimano one does.
Just in case you aren't aware, with the standard shimano front flat mount, one way up is for 140mm rotors, the other way up is for 160mm.
Maybe you could take a closer look before advising rotation of the mount... the Giant mount is actually flush with the fork. You won't want to do it unless you want a funny looking protrusion of the mount.
Nothing that can't be fixed with a hacksaw then LOL
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jlok
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by jlok on Tue Dec 31, 2019 3:17 am
Pretty true, and it shaves grams!
Rikulau V9 DB Custom < BMC TM02 < Litespeed T1sl Disc < Giant Propel Advanced SL Disc 1 < Propel Adv < TCR Adv SL Disc < KTM Revelator Sky < CAAD 12 Disc < Domane S Disc < Alize < CAAD 10
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Patb095
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by Patb095 on Tue Dec 31, 2019 10:03 pm
ruklaw wrote:I'd try rotating the mount you have first (unscrew the mount, unscrew the caliper from the mount, rotate the mount 180 degrees and screw the caliper back onto it, screw it onto the frame).
If it's possible to use the shimano mount it's hard to imagine how the Giant one could work but not accomodate the same rotation that the shimano one does.
Just in case you aren't aware, with the standard shimano front flat mount, one way up is for 140mm rotors, the other way up is for 160mm.
Exactly, I went shopping bike at a giant dealer 1 mont ago and they said the exact same thing.
Envoyé de mon iPhone en utilisant Tapatalk
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bas
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by bas on Fri Jan 03, 2020 3:14 am
You need a Giant mount, the Shimano mounts do not work on the fork. I wanted to put a 160 on the front when I got my bike and was told I couldn't do it. But suddenly the 2020 models have 160 rotors...have ordered the 160 fork mount from Giant, you should be able to order from your bike shop.
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jlok
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by jlok on Fri Jan 03, 2020 4:16 am

- 160mm rotor on 2018 Propel Disc with Shimano mount.
Rikulau V9 DB Custom < BMC TM02 < Litespeed T1sl Disc < Giant Propel Advanced SL Disc 1 < Propel Adv < TCR Adv SL Disc < KTM Revelator Sky < CAAD 12 Disc < Domane S Disc < Alize < CAAD 10
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tomee
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by tomee on Fri Jan 03, 2020 4:42 am
bas wrote: ↑Fri Jan 03, 2020 3:14 am
You need a Giant mount, the Shimano mounts do not work on the fork. I wanted to put a 160 on the front when I got my bike and was told I couldn't do it. But suddenly the 2020 models have 160 rotors...have ordered the 160 fork mount from Giant, you should be able to order from your bike shop.
no, you don't. i just did this today. Thanks to jlok for confirming
Also for those that are saying you can just flip the Giant propietry mount are wrong also.
stock giant mount for 140mm
mount removed. you can see you cant just flip it around for 160mm rotors.
Shimano mount installed
also converted the rears to 160mm
