Re: Bike Mechanics Impart Their Wisdom On Vorb

Postby Velocipedestrian on Tue 18th Feb 11:59am

Are you using a front derailleur? If not, get a narrow/wide ring.
If so, yes but... The curved inner tabs on those XT rings don't play nice with all cranks and may require some filing.

Or get an SLX version for simpler fitment.
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Re: Bike Mechanics Impart Their Wisdom On Vorb

Postby DogsBollocks on Tue 18th Feb 2:08pm

Hey team,

Just changed to a 30T and new chain on my GX Eagle drivetrain and am now getting some serious "jumping" under load. It's fine on a steady cadence, it's just when you stomp on it. It's missing on the same gear, not jumping between gears. Cassette is just over 2 years old. Thoughts ?
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Re: Bike Mechanics Impart Their Wisdom On Vorb

Postby AgrAde on Tue 18th Feb 9:11pm

Your cassette is fucked.
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Re: Bike Mechanics Impart Their Wisdom On Vorb

Postby nostromo on Thu 20th Feb 4:00pm

Velocipedestrian wrote:Are you using a front derailleur? If not, get a narrow/wide ring.
If so, yes but... The curved inner tabs on those XT rings don't play nice with all cranks and may require some filing.

Or get an SLX version for simpler fitment.

I ordered the SLX one thanks
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Re: Bike Mechanics Impart Their Wisdom On Vorb

Postby nostromo on Thu 19th Mar 10:50am

I have a bike with 180mm front and 160mm rear post mount discs as standard. I want to go to 203mm front 180mm rear, but unclear about what adaptors I will need?
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Re: Bike Mechanics Impart Their Wisdom On Vorb

Postby el_booto on Thu 19th Mar 10:54pm

nostromo wrote:I have a bike with 180mm front and 160mm rear post mount discs as standard. I want to go to 203mm front 180mm rear, but unclear about what adaptors I will need?


If theres currently no adaptors under the calipers, you'll need a post mount +20mm for the rear and +23mm for the front. Shimano offer them (if you can find stock) hayes and hope also offer them too. Theirs are less faff but pricier than shimano.
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Re: Bike Mechanics Impart Their Wisdom On Vorb

Postby nostromo on Fri 20th Mar 9:31am

el_booto wrote:
nostromo wrote:I have a bike with 180mm front and 160mm rear post mount discs as standard. I want to go to 203mm front 180mm rear, but unclear about what adaptors I will need?


If theres currently no adaptors under the calipers, you'll need a post mount +20mm for the rear and +23mm for the front. Shimano offer them (if you can find stock) hayes and hope also offer them too. Theirs are less faff but pricier than shimano.


Thanks, yeah I found this info off Pinkbike

Shimano PM adapters....
SM-MA-F180P/P2 = 20mm
SM-MA-F203P/PM = 23mm
SM-MA-F203P/P = 43mm

140mm post mount + SM-MA-F180P/P2 = 160mm rotor
160mm post mount + SM-MA-F180P/P2 = 180mm rotor
160mm post mount + SM-MA-F203P/P = 203mm rotor
180mm post mount + SM-MA-F203P/PM = 203mm rotor
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Re: Bike Mechanics Impart Their Wisdom On Vorb

Postby shmoodiver on Fri 20th Mar 1:40pm

180mm post mount & sram +40mm = 220mm rotor
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