How to remove second bolt on Sram (Red) Chaingrings

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jbattermann
Posts: 75
Joined: Mon Feb 20, 2017 10:47 pm

by jbattermann

Good evening,

I want / need to switch chainrings on my Red crankset but was wondering how I can remove that second bolt (opposite to the one behind the crank)? The chainring came with a tiny rubber or plastic plug that probably goes in there once it has been removed.. but what's the 'correct' way of removing it? Punch it out with a puncher.. or pull it out somehow..?

Cheers and thanks,
.J
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pdlpsher1
Posts: 4013
Joined: Thu Jul 19, 2012 6:09 pm
Location: CO

by pdlpsher1

Drill it out. I forgot the bit size.

You also need a special hidden nut which isn't included with the new chainring. You could reuse the old one by pressing the old one out of the chainring.

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drhex
Posts: 29
Joined: Sat Feb 13, 2016 7:49 pm

by drhex

Take pliers and yank them out (really, it even says so somewhere in the docs iirc). You can put one of the old bolts into the old hidden nut and knock it out with a hammer. Will pull itself in on tightening the screw on the new ring.

PinaF8
Posts: 190
Joined: Mon Jan 23, 2017 8:05 am

by PinaF8

I used a locking vicegrip, voila!
S-WORKS VENGE 1ST GEN
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jbattermann
Posts: 75
Joined: Mon Feb 20, 2017 10:47 pm

by jbattermann

Pliers and yanking the bolt out worked perfectly fine.. thanks everyone!

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JeanMarc
Posts: 26
Joined: Sat Jul 28, 2018 12:34 pm
Location: Montbrison, France

by JeanMarc

drhex wrote:
Mon Jul 31, 2017 7:43 am
Take pliers and yank them out (really, it even says so somewhere in the docs iirc). You can put one of the old bolts into the old hidden nut and knock it out with a hammer. Will pull itself in on tightening the screw on the new ring.
Hello everybody.
No pb to knock the old hidden nut out of the big chain ring.
However, when it came to tighen it on the new chain ring, no way to reach the 9 Nm torque requested.... the bolt and nut turned free before🤬
I assume that the striations of the nut (supposed to prevent rotation) got worn in the process. I guess the female part (which is the chainring itself) is also damaged. Now, to dismantle the thing, I have first to remove the crank (8 bolts / T20 head) and try to hold in position the worn nut 😓.
Just wanted to share this poor experience.
Thanks

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